Academic literature on the topic 'Broadband Photodetector'

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Journal articles on the topic "Broadband Photodetector"

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Zhou, Guigang, Huancheng Zhao, Xiangyang Li, Zhenhua Sun, Honglei Wu, Ling Li, Hua An, Shuangchen Ruan, and Zhengchun Peng. "Highly-Responsive Broadband Photodetector Based on Graphene-PTAA-SnS2 Hybrid." Nanomaterials 12, no. 3 (January 29, 2022): 475. http://dx.doi.org/10.3390/nano12030475.

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The development of wearable systems stimulate the exploration of flexible broadband photodetectors with high responsivity and stability. In this paper, we propose a facile liquid-exfoliating method to prepare SnS2 nanosheets with high-quality crystalline structure and optoelectronic properties. A flexible photodetector is fabricated using the SnS2 nanosheets with graphene-poly[bis(4-phenyl) (2,4,6-trimethylphenyl) amine (PTAA) hybrid structure. The liquid-exfoliated SnS2 nanosheets enable the photodetection from ultraviolet to near infrared with high responsivity and detectivity. The flexible broadband photodetector demonstrates a maximum responsivity of 1 × 105 A/W, 3.9 × 104 A/W, 8.6 × 102 A/W and 18.4 A/W under 360 nm, 405 nm, 532 nm, and 785 nm illuminations, with specific detectivity up to ~1012 Jones, ~1011 Jones, ~109 Jones, and ~108 Jones, respectively. Furthermore, the flexible photodetector exhibits nearly invariable performance over 3000 bending cycles, rendering great potentials for wearable applications.
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You, Jie, Yichi Zhang, Maolong Yang, Bo Wang, Huiyong Hu, Zimu Wang, Jinze Li, Hao Sun, and Liming Wang. "Ultraviolet-Visible-Near Infrared Broadband Photodetector Based on Electronspun Disorder ZnO Nanowires/Ge Quantum Dots Hybrid Structure." Crystals 12, no. 2 (January 25, 2022): 172. http://dx.doi.org/10.3390/cryst12020172.

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Ultraviolet-visible-near infrared broadband photodetectors have significant prospects in many fields such as image sensing, communication, chemical sensing, and day and nighttime surveillance. Hybrid one-dimensional (1D) and zero-dimensional (0D) materials are attractive for broadband-responsive photodetectors since its unique charges transfer characteristics and facile fabrication processes. Herein, a Si/ZnO nanowires/Ge quantum dots photodetector has been constructed via processes that combined electrospinning and spin-coating methods. A broadband response behavior from ultraviolet to near-infrared (from 250 to 1550 nm) is observed. The responsivity of the hybrid structure increases around three times from 550 to 1100 nm compared with the pure Si photodetector. Moreover, when the photodetector is illuminated by a light source exceeding 1100 nm, such as 1310 and 1550 nm, there is also a significant photoresponse. Additionally, the ZnO NWs/Ge quantum dots heterostructure is expected to be used in flexible substrates, which benefits from electrospinning and spin-coating processes. The strategy that combines 1D ZnO NWs and 0D solution-processed Ge QDs nanostructures may open a new avenue for flexible and broadband photodetector.
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Li, Xiangyang, Shuangchen Ruan, and Haiou Zhu. "SnS Nanoflakes/Graphene Hybrid: Towards Broadband Spectral Response and Fast Photoresponse." Nanomaterials 12, no. 16 (August 13, 2022): 2777. http://dx.doi.org/10.3390/nano12162777.

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High responsivity has been recently achieved in a graphene-based hybrid photogating mechanism photodetector using two-dimensional (2D) semiconductor nanosheets or quantum dots (QDs) sensitizers. However, there is a major challenge of obtaining photodetectors of fast photoresponse time and broad spectral photoresponse at room temperature due to the high trap density generated at the interface of nanostructure/graphene or the large band gap of QDs. The van der Waals interfacial coupling in small bandgap 2D/graphene heterostructures has enabled broadband photodetection. However, most of the photocarriers in the hybrid structure originate from the photoconductive effect, and it is still a challenge to achieve fast photodetection. Here, we directly grow SnS nanoflakes on graphene by the physical vapor deposition (PVD) method, which can avoid contamination between SnS absorbing layer and graphene and also ensures the high quality and low trap density of SnS. The results demonstrate the extended broad-spectrum photoresponse of the photodetector over a wide spectral range from 375 nm to 1550 nm. The broadband photodetecting mechanisms based on a photogating effect induced by the transferring of photo-induced carrier and photo-hot carrier are discussed in detail. More interestingly, the device also exhibits a large photoresponsivity of 41.3 AW−1 and a fast response time of around 19 ms at 1550 nm. This study reveals strategies for broadband response and sensitive photodetectors with SnS nanoflakes/graphene.
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Wang, Jiaying, Yisong Zhu, Wenhao Wang, Yunze Li, Rui Gao, Peng Yu, Hongxing Xu, and Zhiming Wang. "Broadband Tamm plasmon-enhanced planar hot-electron photodetector." Nanoscale 12, no. 47 (2020): 23945–52. http://dx.doi.org/10.1039/d0nr06294d.

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Lu, Yueheng, Xiao Sun, Huabin Zhou, Haojie Lai, Ran Liu, Pengyi Liu, Yang Zhou, and Weiguang Xie. "A high-performance and broadband two-dimensional perovskite-based photodetector via van der Waals integration." Applied Physics Letters 121, no. 16 (October 17, 2022): 161104. http://dx.doi.org/10.1063/5.0116505.

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Van der Waals (vdW) integration of two-dimensional (2D) nanosheets provides the possibility to design optoelectronic devices with extended functionality in a controllable manner. Here, by leveraging the appropriate energy band alignment and the high-efficiency charge transfer at the junction, we construct the MoS2/graphene/2D-perovskite vdW heterostructure, which realizes the highly sensitive and broadband photodetection. Particularly, at the near-infrared (NIR) wavelength (λ = 1550 nm), the heterostructure photodetector shows a balanced trade-off between the high responsivity (>3000 A/W) and fast response time (<1 ms), outperforming the previously reported NIR photodetectors based on all-inorganic vdW heterostructures. Our work not only extends the response wavelength of the 2D hybrid perovskite-based photodetector to the NIR range, but also offers additional insight into optoelectronic devices via vdW integration engineering.
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Zhang, Xinlei, Yuanfang Yu, Yueying Cui, Fang Yang, Wenhui Wang, Lin Liu, Junpeng Lu, and Zhenhua Ni. "High-performance broadband WO3x/Bi2O2Se photodetectors based on plasmon-induced hot-electron injection." Applied Physics Letters 121, no. 6 (August 8, 2022): 061103. http://dx.doi.org/10.1063/5.0106392.

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Two-dimensional (2D) Bi2O2Se has emerged as a promising candidate for broadband photodetection, owing to its superior carrier mobility, outstanding air-stability, and suitable bandgap. However, Bi2O2Se photodetectors suffer limited sensitivity at a near-infrared region due to the relatively weak light absorption at this band. Here, it is demonstrated that coupling with plasmonic nanostructures can effectively improve the performance of Bi2O2Se photodetectors at a broad spectral range of 532–1550 nm. By virtue of plasmon-induced hot-electron injection and the improved light absorption, the WO3 −x/Bi2O2Se hybrid photodetector exhibits a high responsivity of ∼1.7 × 106 A/W at 700 nm, and ∼48 A/W at a communication O-band of 1310 nm, which is nearly one order of magnitude higher than that of an intrinsic Bi2O2Se device. Moreover, profited by ultrafast hot electron transfer and the avoided defect trapping, the device maintains a high-speed photoresponse (rise time ∼326 ns, decay time ∼47 μs). Our results show that 2D materials coupled with plasmonic nanostructures is a promising architecture for developing state-of-the-art broadband photodetection.
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Yang, Jiawei, Yudong Liu, Haina Ci, Feng Zhang, Jianbo Yin, Baolu Guan, Hailin Peng, and Zhongfan Liu. "High-Performance 3D Vertically Oriented Graphene Photodetector Using a Floating Indium Tin Oxide Channel." Sensors 22, no. 3 (January 26, 2022): 959. http://dx.doi.org/10.3390/s22030959.

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Vertically oriented graphene (VG), owing to its sharp edges, non-stacking morphology, and high surface-to-volume ratio structure, is promising as a consummate material for the application of photoelectric detection. However, owing to high defect and fast photocarrier recombination, VG-absorption-based detectors inherently suffer from poor responsivity, severely limiting their viability for light detection. Herein, we report a high-performance photodetector based on a VG/indium tin oxide (ITO) composite structure, where the VG layer serves as the light absorption layer while ITO works as the carrier conduction channel, thus achieving the broadband and high response nature of a photodetector. Under the illumination of infrared light, photoinduced carriers generated in VG could transfer to the floating ITO layer, which makes them separate and diffuse to electrodes quickly, finally realizing large photocurrent detectivity. This kind of composite structure photodetector possesses a room temperature photoresponsivity as high as ~0.7 A/W at a wavelength of 980 nm, and it still maintains an acceptable performance at temperatures as low as 87 K. In addition, a response time of 5.8 s is observed, ~10 s faster than VG photodetectors. Owing to the unique three-dimensional morphology structure of the as-prepared VG, the photoresponsivity of the VG/ITO composite photodetector also presented selectivity of incidence angles. These findings demonstrate that our novel composite structure VG device is attractive and promising in highly sensitive, fast, and broadband photodetection technology.
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Lin, Zhitao, Wenbiao Zhu, Yonghong Zeng, Yiqing Shu, Haiguo Hu, Weicheng Chen, and Jianqing Li. "Enhanced Photodetection Range from Visible to Shortwave Infrared Light by ReSe2/MoTe2 van der Waals Heterostructure." Nanomaterials 12, no. 15 (August 3, 2022): 2664. http://dx.doi.org/10.3390/nano12152664.

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Type II vertical heterojunction is a good solution for long-wavelength light detection. Here, we report a rhenium selenide/molybdenum telluride (n-ReSe2/p-MoTe2) photodetector for high-performance photodetection in the broadband spectral range of 405–2000 nm. Due to the low Schottky barrier contact of the ReSe2/MoTe2 heterojunction, the rectification ratio (RR) of ~102 at ±5 V is realized. Besides, the photodetector can obtain maximum responsivity (R = 1.05 A/W) and specific detectivity (D* = 6.66 × 1011 Jones) under the illumination of 655 nm incident light. When the incident wavelength is 1550–2000 nm, a photocurrent is generated due to the interlayer transition of carriers. This compact system can provide an opportunity to realize broadband infrared photodetection.
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Li, Haixia, Bingyi Liu, Weiwei Lin, Yang Liu, Yu Wang, Zhongyuan Zhang, Lun Xiong, and Jiayou Tao. "Enhancing Performance of Broadband Photodetectors Based on Perovskite CsPbBr3 Nanocrystals/ZnO-Microwires Heterostructures." Science of Advanced Materials 13, no. 9 (September 1, 2021): 1748–55. http://dx.doi.org/10.1166/sam.2021.4072.

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A broadband photodetector response in the ultraviolet (UV)-to-green range (up to 530 nm) based on perovskite CsPbBr3 nanocrystals (NCs)/ZnO-microwires (MWs) heterostructures was realized via a convenient spin-coating method. Under UV light (365 nm) illumination, compared with a bare-ZnO-MW-based photodetector, the CsPbBr3-NCs/ZnO-MWs-heterostructure-based photodetector exhibited a faster photoresponse (<0.1 s) and higher current responsivity (93.50 AW−1), external quantum efficiency (3399%), and detectivity (4.4 × 1010). In addition, the photodetector based on CsPbBr3-NCs/ZnO-MWs heterostructures also exhibited a very fast photoresponse to green light (530 nm). These can be ascribed to the strong light-trapping ability of CsPbBr3 NCs and high charge-transfer efficiency at the CsPbBr3-NCs/ZnO-MWs-heterojunction interface due to the built-in field, which facilitates the spatial separation of the photogenerated carriers. Therefore, this work will develop perovskite/ZnO nanomaterials as promising building blocks for broadband photodetectors and wider optoelectronic applications.
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Tsai, Shang Yu, Ching-Chang Lin, Cheng-Tang Yu, Yen-Shuo Chen, Wei-Lin Wu, Yu-Cheng Chang, Chun Chi Chen, and Fu-Hsiang Ko. "Screen-Printable Silver Paste Material for Semitransparent and Flexible Metal–Semiconductor–Metal Photodetectors with Liquid-Phase Procedure." Nanomaterials 12, no. 14 (July 15, 2022): 2428. http://dx.doi.org/10.3390/nano12142428.

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Photodetectors are widely applied in modern industrial fields because they convert light energy into electrical signals. We propose a printable silver (Ag) paste electrode for a highly flexible metal–semiconductor–metal (MSM) broadband visible light photodetector as a wearable and portable device. Single-crystal and surface-textured silicon substrates with thicknesses of 37.21 μm were fabricated using a wet etching process. Surface texturization on flexible Si substrates enhances the light-trapping effect and minimizes reflectance from the incident light, and the average reflectance is reduced by 16.3% with pyramid-like structures. In this study, semitransparent, conductive Ag paste electrodes were manufactured using a screen-printing with liquid-phase process to form a flexible MSM broadband visible light photodetector. The transmittance of the homemade Ag paste solution fell between 34.83% and 36.98% in the wavelength range of visible light, from 400 nm to 800 nm. The highest visible light photosensitivity was 1.75 × 104 at 19.5 W/m2. The photocurrents of the flexible MSM broadband visible light photodetector were slightly changed under concave and convex conditions, displaying stable and durable bending properties.
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Dissertations / Theses on the topic "Broadband Photodetector"

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Konukbay, Atakan. "Design of a voltage tunable broadband quantum well infrared photodetector." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Jun%5FKonukbay.pdf.

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Arora, Himani, Renhao Dong, Tommaso Venanzi, Jens Zscharschuch, Harald Schneider, Manfred Helm, Xinliang Feng, Enrique Cánovas, and Artur Erbe. "Demonstration of a Broadband Photodetector Based on a 2D Metal–Organic Framework." Wiley-VCH, 2020. https://tud.qucosa.de/id/qucosa%3A72555.

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Metal–organic frameworks (MOFs) are emerging as an appealing class of highly tailorable electrically conducting materials with potential applications in optoelectronics. Yet, the realization of their proof-of-concept devices remains a daunting challenge, attributed to their poor electrical properties. Following the authors’ recent report on a semiconducting Fe₃(THT)₂(NH₄)₃ (THT: 2,3,6,7,10,11-triphenylenehexathiol) 2D MOF with record-high mobility and band-like charge transport, here, Fe₃(THT)₂(NH₄)₃ MOF-based photodetector operating in photoconductive mode capable of detecting a broad wavelength range from UV to NIR (400–1575 nm) is demonstrated. The narrow IR bandgap of the active layer (≈0.45 eV) constrains the performance of the photodetector at room temperature by band-to-band thermal excitation of charge carriers. At 77 K, the device performance is significantly improved; two orders of magnitude higher voltage responsivity, lower noise equivalent power, and higher specific detectivity of 7 × 10⁸ cm Hz¹/² W⁻¹ are achieved under 785 nm excitation. These figures of merit are retained over the analyzed spectral region (400–1575 nm) and are commensurate to those obtained with the first demonstrations of graphene and black phosphorus based photodetectors. This work demonstrates the feasibility of integrating conjugated MOFs as an active element into broadband photodetectors, thus bridging the gap between materials’ synthesis and technological applications.
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Zhang, Baosen. "SOLUTION-PROCESSED BROADBAND BULK HETEROJUNCTION PEROVSKITE PHOTODETECTORS." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1556551220940959.

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Zhan, Jun-Yu, and 詹竣宇. "Nanostructure-enhanced Broadband Photodetector Based on Graphene/CdSe Quantum Dot/Silicon Multiple Junctions." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/83937728306479422712.

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碩士
國立臺灣海洋大學
光電科學研究所
102
The thesis studies the fabrication of efficient broadband(380 nm ~ 940 nm) photodetector(PD) base on graphene/CdSe QDs/Si multiple junctions. At 2 V bias for the graphene side, the external quantum efficiency(EQE) up to 218 % at 510 nm and the responsivity as high as 0.9 A/W for the range from 520 nm to 660 nm were achieved. The response time and recovery time are 0.24 ms and 0.28 ms, respectively. Under bias of -2 V for the graphene side, the dark current, photocurrent and on/off ratio was fou- nd to be 1.77#westeur024#10-6 A, 2.06#westeur024#10-4 A and ~10+2, respectively. It was found that when CdSe QDs were added, the EQE and responsivity of graphene/CdSe QDs/Si PD with respect to that of graphene/Si PD were enhanced together with the increase in the absorption band of the detector ranging from ultraviolet to near-infrared. Thus the graphene/CdSe QDs/Si multiple junctions can form the efficient broadband phtodetector.
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Kung, Shu-Yen, and 孔書硯. "The Applications of InGaAs–Capped Quantum–Dot Infrared Photodetectors in Broadband Detection and Thermal Imaging." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/21463076926313106856.

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碩士
國立清華大學
電子工程研究所
99
In this thesis, we have investigated the fundamental property of the InGaAs–capped quantum dot infrared photodetectors (QDIPs) and their applications in broadband detection and thermal imaging. Compared with standard InAs/GaAs QDIPs, InGaAs–capped QDIPs have the detection wavelength which is shifted from 6 to 7.9 μm. The results suggest that the dominant transition mechanism in the InGaAs–capped QDIPs is from the QD excited state to the InGaAs QW ground state, which reduced energy difference between the two states. By decreasing the InAs QD coverage from 2.5 to 2.0 ML, an even longer detection wavelength 10.4 μm is observed. Due to the QD excited state is pushed closer to the QW ground state in the InGaAs capping layer. With the device performance of standard and InGaAs–capped QDIPs, a straightforward approach to achieve broadband QDIPs is to stack the two structures into one device. The device would exhibit a wide detection window ranging from 4 to 11 μm with high responsivities. The phenomenon is attributed to the high responsivities of the standard QD and the InGaAs–capped QD structures in the MWIR and LWIR ranges, respectively. We bring up a simple ideal that without the complicated fabrication process, precise focusing mirror lens and readout integrated circuit (ROIC) prepare for focal plane array to extract the large–format, the thermal imaging formation can be obtained easily by a single–device scanning. It is a promising step for diagnosing diseases from a tiny cell.
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You, Yan-Ting, and 游晏婷. "Low Temperature Growth of Se microstructures by A Plasma-Assisted Selenization Process Toward Broadband Photodetectors." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/6tccd6.

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Yu, Chung-Hua, and 喻忠華. "Study of broadband infrared photodetection and thermal radiation control on silicon based micro-nano hybrid structures." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/82608954397987963817.

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碩士
國立臺灣大學
材料科學與工程學研究所
105
The infrared absorption spectrum in midinfrared (mid IR, MIR) spectral range contains “fingerprints” of the most common molecular bonds, key to sample composition analysis and is useful for nondestructive and rapid analysis for material characterization and environment monitoring. Furthermore, the MIR light can be applied to thermal image that is corresponding spectral regime for the thermal radiation from room temperature to several hundred degrees Celcius. On the other hand, near infrared (NIR) spectral range is the regime for optical telecommunication. To sum the above, photodetectors, light sources, and thermal dissipation routes in infrared spectral range all perform the importance in various applications. However, the study in this field so far faces several problems, including processes being complicated, slow, expensive, and not compatible with silicon semiconductor process technology (Si-CMOS, Silicon-Complementary Metal-Oxide-Semiconductor). This thesis would like to develop silicon-based photodetectors working from NIR to MIR regimes, Moreover, using the broadband, high absorption of silicon-based structures to develop thermal radiation based heat dissipation structures. In the first part of this thesis, the titanium nitride (TiN) thin film coated on a deep trench silicon structure to generate low reflection and high absorption properties at resonace wavelengths. Also, TiN thin film can form a good Schottky contact with a p-Si substrate. When the resonanct wavelength at 10.6 μm, the optical absorption could be as high as 60.7%. The responsivity could be up to 0.632mV W-1 under CO2 laser (light intensity=4.26W/cm2) illumination and up to 246mV W-1 under low light intensity light source (light intensity=2.64mW/cm2). The excess voltage has great linear relationship with light intensity, and the measurement was highly repeatable. Also, the measurements were all conducted at room temperature which could satisfy the low energy comsumption demand. In the second part of this thesis, we would like to develop photodetectors working in optical telecommunication spectral range. We used back illuminated schemes of TiN thin film along with deep trench silicon structure that can perform broadband, wide angle of low reflection, and high absorption properties. The optical absorption was up to 85.7% at 1550nm wavelength. TiN thin film formed a Schottky contact with p-Si substrates and the locations which carriers generated were close to the contact surfaces. When devices conducted at zero bias, the responsivity was up to 0.412 mA W-1, and detectivity was 5.02 x109 Jones. The responsivity of the devices differed very little when the angle of incident light below 60o. In addition, we also demonstrated the photovoltage detection ability of the devices and its responsivity was 15.4mV W-1. In the the third part of this thesis, the TiN thin film and deep trench silicon structure performed broadband high absorption properties in MIR. The high absorption also represented the high emission property. By the optical measurement of practical devices, the average absorption was up to 61%. Use white light of Xe lamp along with AM1.5 filter in order to simulate solar light heating the devices. Its equilibrium temperature was lower 8.5oC than the flat film sample and the decay time constant of cooling was also 3 seconds shorter. The deeper trench, the closer the hole to period ratio (H/P) to 1/3, the lower the equilibrium temperature of the device, certificating that the high absorption conditions in simulations with lower equilibrium temperature. In the the fourth part of this thesis, we used gold (Au) thin film combined with shallow trench silicon oxide (SiO2) and successfully designed a narrow band and high emission device at specific wavelength (4.3μm), making it a high quality factor (Peak wavelength/ Full width at half maximum, Q= λ/Δλ), low energy comsumption thermal emission light source in MIR. In addition, this structure could also apply to enhance the surface enhanced infrared absorption because of its high electric field on its surface. The structure made CO2 absorption signal enhanced 5.3 times without changing the absorption peak ratio of the two peaks of CO2.
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Chen, Shih-Sheng, and 陳仕昇. "Efficient Broadband a-IGZO/SiO2/Si Heterojunction Photodetectors Based on a-IGZO/Graphene Nano-flakes Composites Prepared by Solution Process." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/52506121259820701608.

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碩士
國立臺灣海洋大學
光電科學研究所
102
This thesis studies the fabrication of hetero-structured broadband photodetectors fabricated by the composite consisted of indium gallium zinc oxide (IGZO) incorporated with the graphene nanoflakes (GNFs) and silicon oxide (SiO2)/silicon substrate. It was found that IGZO:GNFs film along with the increase in volume concentration (0.1 ~ 0.9 vol%), the conductivity of film increases from 0.027 S / m to 0.749 S / m, which is an increase of 27.7 times. The current-voltage relation of the IGZO:GNFs/SiO2/Si devices exhibited the p-n junction characteristics. The photoresponse range comprises the UV absorption of IGZO and visible near-infrared absorption of silicon. Under negative bias of -3 V, and the illumination of light with wavelength of 350 nm (500 nm), the photocurrent of pure IGZO/ SiO2/Si diode were found to be 8.81 10 A (1.04 10 A), while the illumination of light with wavelength of 350 nm (500 nm), the photocurrent of IGZO:GNFs (0.6 vol%)/SiO2/Si diode were found to be 4.39 10 A (4.90 10 A). The corresponding responsivity for IGZO/SiO2/Si and IGZO:GNFs (0.6 vol%)/SiO2/Si were found to be 0.109 A/W (0.164 A/W) and 0.146 A/W (0.216 A/W), respectively, for illumination of 350 nm (500 nm) light. Besides, the rising times for IGZO/SiO2/Si and IGZO:GNFS/SiO2/Si devices were found to be 8.95 ms and 8.05 ms, respectively. And the the decay times for IGZO/SiO2/Si and IGZO:GNFS/SiO2/Si devices were found to be 5.83 ms and 5.48 ms, respectively. The results showed that the response times of IGZO:GNS/SiO2/Si devices become better than that of IGZO/SiO2/Si devcies. Thus, we have successfully fabricated the IGZO:GNFs/SiO2/Si hetero-structured broadband photodetectors.
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Lin, Ching-Che, and 林敬哲. "Study of Low Power Consumption and Ultra Broadband Detection of GaAs-based Photodetectors Working from Extreme Ultraviolet to Infrared Regime." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/bf9cck.

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碩士
國立臺灣大學
材料科學與工程學研究所
106
In this thesis, we study gallium arsenide (GaAs) and hot electron based Schottky diode of photodetector performing broadband detection capability working from extreme ultraviolet (EUV) to near-infrared (NIR) regime. This study demonstrated the hot electrons generated in structured gold (Au) or molybdenum (Mo) electrodes and propagating to metal/ semiconductor (GaAs) junction can be used for optical-electrical signal conversion for detecting light with photon energies below the bandgap of the semiconductor, especially in the spectral regime for optical telecommunication. Furthermore, we investigated the optical properties of GaAs and metal films in the EUV spectral regime to demonstrate a low power consumption of photodetector having an ultra-broadband detection ability. In the first part of this thesis, metal (Au, Mo)/ semiconductor (GaAs) based Schottky junction photodetector has been designed for hot electron collection from deep-trench/ thin metal (DTTM) based active antenna which takes the advantage of surface plasmon resonance and three-dimensional cavity effects. The DTTM-based devices have attractive properties of low reflection and high absorption in the near-infrared (NIR) regime, which enables the GaAs based devices breaking the limitation of bandgap of 870 nm (1.42 eV), extending its detection capability to the spectral regime of optical communication wavelengths of 1310 nm and 1550 nm. Taking the Mo/GaAs DTTM device as an example, the photocurrent responsivities at 1310 nm and 1550 nm are 0.27 mA/W and 0.16 mA/W, respectively, which is an order of magnitude smaller than that of the Si-based DTTM device. However, in terms of photovoltage detection, the response of the Mo/GaAs DTTM device at 1310 nm and 1550 nm are 577.47 (V/W) and 435.15 (V/W), respectively, which is 10,000 times larger than the photoelectric response of a Si-based DTTM device. We suggested that the photovoltage responsivity is significant for the high resistance and trap density of GaAs substrate. In the second part of this thesis, the concept of backside-illuminated schemes of metal (Au or Mo) film along with GaAs based DTTM structure were proposed. Compared with the front-illuminated devices, the backside-illuminated devices have three main advantages: (1) Hot carriers could be effectively generated and effective collection. (2) Devices performed broadband absorption covering the wavelengths of 1310 nm and 1550 nm, (3) Devices performance were not sensitive to the angle of incident performing omnidirectional detection properties. The measured results demonstrated that the responsivity of photocurrent and photovoltage are much higher than those of the front-illuminated devices. In the case of Mo/GaAs DTTM device, the photocurrent responsivity of the back-illuminated type are 0.95 mA/W and 0.25 mA/W at 1310 nm and 1550 nm, respectively, and the photovoltage responsivity are 781.52 (V/W) and 540.96 (V/W), respectively. In the third part of this thesis, because of high transmission at the wavelength of 13.5 nm, we suggested Mo is a suitable metal as the front electrode of Schottky photodetectors in the EUV spectral regime. Moreover, GaAs has a high absorption coefficient compared to Si in the EUV regime. Therefore, it is considered that Mo/GaAs-based Schottky diodes have a good opportunity to be used as a superior photodetectors working in EUV regime. In this study, we extended the Mo/GaAs DTTM devices operating in the EUV regime. Because of high resistance of GaAs substrate, the generated excess photocurrent in the EUV regime is much smaller than that of the Si-based photodetector.
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Books on the topic "Broadband Photodetector"

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Design of a Voltage Tunable Broadband Quantum Well Infrared Photodetector. Storming Media, 2002.

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Book chapters on the topic "Broadband Photodetector"

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Singh, Manjri, Gaurav Kumar, Nisha Prakash, Suraj P. Khanna, Prabir Pal, and Surinder P. Singh. "Broadband Photodetector with Lateral n-rGO/p+Si Heterojunction." In Springer Proceedings in Physics, 99–104. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-97604-4_16.

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Ray, Samit K., Subhrajit Mukherjee, Tamal Dey, Subhajit Jana, and Elad Koren. "Two-Dimensional Material-Based Quantum Dots for Wavelength-Selective, Tunable, and Broadband Photodetector Devices." In Quantum Dot Photodetectors, 249–87. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74270-6_6.

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Su, Yanjie. "Carbon-Based Heterojunction Broadband Photodetectors." In High-Performance Carbon-Based Optoelectronic Nanodevices, 91–129. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5497-8_5.

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"Photodetectors." In Broadband Circuits for Optical Fiber Communication, 25–43. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471726400.ch3.

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Wang, Shufang, and Guangsheng Fu. "Broadband Photodetectors Based on c-Axis Tilted Layered Cobalt Oxide Thin Films." In Photodetectors. InTech, 2012. http://dx.doi.org/10.5772/36190.

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LI, SHENG S. "MULTI-COLOR, BROADBAND QUANTUM WELL INFRARED PHOTODETECTORS FOR MID-, LONG-, AND VERY LONG-WAVELENGTH INFRARED APPLICATIONS." In Intersubband Infrared Photodetectors, 169–209. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812775535_0005.

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Crisci, Teresa, Luigi Moretti, Mariano Gioffrè, and Maurizio Casalino. "Near-Infrared Schottky Silicon Photodetectors Based on Two Dimensional Materials." In Light-Emitting Diodes and Photodetectors - Advances and Future Directions [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99625.

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Abstract:
Since its discovery in 2004, graphene has attracted the interest of the scientific community due to its excellent properties of high carrier mobility, flexibility, strong light-matter interaction and broadband absorption. Despite of its weak light optical absorption and zero band gap, graphene has demonstrated impressive results as active material for optoelectronic devices. This success pushed towards the investigation of new two-dimensional (2D) materials to be employed in a next generation of optoelectronic devices with particular reference to the photodetectors. Indeed, most of 2D materials can be transferred on many substrates, including silicon, opening the path to the development of Schottky junctions to be used for the infrared detection. Although Schottky near-infrared silicon photodetectors based on metals are not a new concept in literature the employment of two-dimensional materials instead of metals is relatively new and it is leading to silicon-based photodetectors with unprecedented performance in the infrared regime. This chapter aims, first to elucidate the physical effect and the working principles of these devices, then to describe the main structures reported in literature, finally to discuss the most significant results obtained in recent years.
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Conference papers on the topic "Broadband Photodetector"

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Edelstein, Shahar, S. R. K. Chaitanya Indukuri, Noa Mazurski, and Uriel Levy. "Waveguide-Coupled Mid-IR Photodetector Based on Interlayer Excitons Absorption in a WS2/HfS2 Heterostructure." In CLEO: Science and Innovations. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sm3k.8.

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We demonstrate a waveguide-coupled mid-IR photodetector based on interlayer excitons in a WS2/HfS2 heterostructure. We measure broadband photodetection, with responsivity in the order of tens of µA/W with low losses to the waveguide mode.
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Li, Baojun, and Xianguang Yang. "Organic-inorganic broadband photodetector." In International Conference on Optical Instruments and Technology 2017: Micro/Nano Photonics: Materials and Devices, edited by Ya Sha Yi, Liquan Dong, Baojun Li, and Xingjun Wang. SPIE, 2018. http://dx.doi.org/10.1117/12.2288873.

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Zhang, Yongzhe, Jianxi Yao, and Qi Jie Wang. "Broadband high photoresponse graphene photodetector." In Asia Communications and Photonics Conference. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/acp.2013.af2a.4.

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Zhang, Yongzhe, Jianxi Yao, and Qi Jie Wang. "Broadband high photoresponse graphene photodetector." In Asia Communications and Photonics Conference. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/acpc.2013.af2a.4.

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Cai, Xinghan, Ryan J. Suess, Andrei B. Sushkov, Thomas E. Murphy, Michael S. Fuhrer, and H. Dennis Drew. "Broadband Responsivity of a Graphene Photodetector." In CLEO: Science and Innovations. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/cleo_si.2013.cth4j.7.

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Dutta, Achyut K., and M. Saif Islam. "Novel broadband photodetector for optical communication." In Optics East 2005, edited by Achyut K. Dutta, Yasutake Ohishi, Niloy K. Dutta, and Jesper Moerk. SPIE, 2005. http://dx.doi.org/10.1117/12.634119.

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Huang, Song, Jinze Cao, Jiaxin Cao, Qiang Wu, Weiqing Gao, and Jingjun Xu. "Black Silicon Photodetector with Broadband Spectral Photoresponsivity and High Gain by Ti-hyperdoping." In CLEO: Applications and Technology. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.atu4c.7.

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Ti-hyperdoped black silicon photodetector is prepared by femtosecond laser irradiation, which high comprehensive properties with broadband spectral photoresponsivity and high gain, showing great potential in high-performance imaging and large-scale optoelectronic integration.
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Gupta, Shuchi, Gerasimos Konstantatos, Gabriele Navickaite, Carles Monasterio, Juan José Piqueras, Raúl Pérez, Gregory Burwell, et al. "Colloidal Quantum Dots-Graphene based Broadband Photodetector." In nanoGe Fall Meeting 2018. València: Fundació Scito, 2018. http://dx.doi.org/10.29363/nanoge.fallmeeting.2018.134.

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Runge, Patrick, Felix Ganzer, Jonas Gläsel, Sebastian Wünsch, Sven Mutschall, and Martin Schell. "Broadband 145GHz Photodetector Module Targeting 200GBaud Applications." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/ofc.2020.m2a.1.

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Cakmakyapan, Semih, and Mona Jarrahi. "Plasmonics-enhanced broadband graphene photodetector (Conference Presentation)." In Photonic and Phononic Properties of Engineered Nanostructures VII, edited by Ali Adibi, Shawn-Yu Lin, and Axel Scherer. SPIE, 2017. http://dx.doi.org/10.1117/12.2253196.

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Reports on the topic "Broadband Photodetector"

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Sobolewski, Roman, and Philippe M. Fauchet. Ultrafast Broadband Photodetectors for High-Tc Superconductive Optoelectronics. Fort Belvoir, VA: Defense Technical Information Center, January 1997. http://dx.doi.org/10.21236/ada344891.

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