Дисертації з теми "Hybrid quantum devices"
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Bhat, Jerome C. "Electroluminescent hybrid organic/inorganic quantum dot devices." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298766.
Повний текст джерелаBoonkoom, Thitikorn. "InP quantum dots for hybrid photovoltaic devices." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/17778.
Повний текст джерелаCoe-Sullivan, Seth (Seth Alexander). "Hybrid organic/quantum dot thin film structures and devices." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33935.
Повний текст джерелаIncludes bibliographical references (p. 157-169).
Organic light emitting diodes have undergone rapid advancement over the course of the past decade. Similarly, quantum dot synthesis has progressed to the point that room temperature highly efficient photoluminescence can be realized. It is the purpose of this work to utilize the beneficial properties of these two material sets in a robust light emitting device. New deposition techniques are necessary to the realization of this goal, enabling QD organic hybrids to be created in a quick and reliable manner compatible with known device fabrication methods. With these techniques, quantum dot light emitting devices are fabricated, measured, and analyzed. The devices are of high efficiency and color saturation, and provide us with a test bed for understanding the interactions between inorganic QDs and organic thin films.
by Seth Coe-Sullivan.
Ph.D.
Garner, Brett William. "Multifunctional Organic-Inorganic Hybrid Nanophotonic Devices." Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc6108/.
Повний текст джерелаGünel, Haci Yusuf [Verfasser]. "Quantum transport in nanowire-based hybrid devices / Haci Yusuf Günel." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/1047231794/34.
Повний текст джерелаGünel, Hacı Yusuf [Verfasser]. "Quantum transport in nanowire-based hybrid devices / Haci Yusuf Günel." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://nbn-resolving.de/urn:nbn:de:hbz:82-opus-47434.
Повний текст джерелаHaverinen, H. (Hanna). "Inkjet-printed quantum dot hybrid light-emitting devices—towards display applications." Doctoral thesis, University of Oulu, 2010. http://urn.fi/urn:isbn:9789514261275.
Повний текст джерелаBothner, Daniel [Verfasser], and Reinhold [Akademischer Betreuer] Kleiner. "Micropatterned Superconducting Film Circuitry for Operation in Hybrid Quantum Devices / Daniel Bothner ; Betreuer: Reinhold Kleiner." Tübingen : Universitätsbibliothek Tübingen, 2014. http://d-nb.info/1162897465/34.
Повний текст джерелаDabbousi, Bashir O. (Bashir Osama). "Fabrication and characterization of hybrid organic/inorganic electroluminescent devices based on cadmium selenide nanocrystallites (quantum dots)." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10434.
Повний текст джерелаHuang, Wei-Jie, and Wei-Jie Huang. "Towards Increased Photovoltaic Energy Generation Efficiency and Reliability: Quantum-Scale Spectral Sensitizers in Thin-Film Hybrid Devices and Microcracking in Monocrystalline Si." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/623175.
Повний текст джерелаPfirrmann, Marco [Verfasser]. "Adding nonlinearity to an electromagnetic-magnonic quantum hybrid device / Marco Pfirrmann." Karlsruhe : KIT Scientific Publishing, 2020. http://d-nb.info/1216997306/34.
Повний текст джерелаSchornbaum, Julia [Verfasser], and Jana [Akademischer Betreuer] Zaumseil. "Lead Chalcogenide Quantum Dots and Quantum Dot Hybrids for Optoelectronic Devices / Julia Schornbaum. Gutachter: Jana Zaumseil." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2015. http://d-nb.info/1082426415/34.
Повний текст джерелаSchornbaum, Julia Verfasser], and Jana [Akademischer Betreuer] [Zaumseil. "Lead Chalcogenide Quantum Dots and Quantum Dot Hybrids for Optoelectronic Devices / Julia Schornbaum. Gutachter: Jana Zaumseil." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2015. http://nbn-resolving.de/urn:nbn:de:bvb:29-opus4-68977.
Повний текст джерелаSilva, Barbosa Jéssica Fernanda Da. "Fabrication and characterization of a hybrid quantum device for single spin microwave detection." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP003.
Повний текст джерелаThe context of this thesis is a proposal by Haikka et al. [1] that aims at detecting individual spins with microwaves, using a superconducting micro-resonator that incorporates a nanometric constriction located close to the spin, cooled down to millikelvin temperatures. The electron spins of choice are shallow implanted ~ 20 nm depth single Nitrogen - Vacancy (NV) centers in an isotopically purified ¹²C diamond. Their transition frequency is ~ 2.88 GHz We report the fabrication of a single NV center grid with long coherence times and well localized with respect to alignment marks etched in the diamond. We demonstrate a method to determine the position of shallow individual implanted nitrogen-vacancy (NV) centers with respect to a metallic nanowire deposited on diamond. We use the NV center as a vector magnetometer [2, 3] to measure the field generated by passing a DC current through the wire, enabling to infer the NV centers position relative to the wire with a precision of ~ 10 nm. We fabricated and performed the characterization of a LC resonator of low impedance 11Ω, internal quality factor as high as 2.10⁵ and resonance frequency of ~ 2.93 GHz on top of such an ensemble of implanted NVs. The magnetic field resilience of the resonator was however not sufficient to observe the spin signal. [1] P. Haikka, Y. Kubo, A. Bienfait, P. Bertet, and K. Mølmer, “Proposal fordetecting a single electron spin in a microwave resonator,” Phys. Rev. A, vol. 95,p. 022306, Feb 2017. [2] J. M. Taylor, P. Cappellaro, L. Childress, L. Jiang, D. Budker, P. R. Hemmer, A. Yacoby, R. Walsworth, and M. D. Lukin, “High-sensitivity diamond magnetometer with nanoscaleresolution,” Nature Phys, vol. 4, pp. 810–816, Oct. 2008. [3] X.-D. Chen, F.-W. Sun, C.-L. Zou, J.-M. Cui, L.-M. Zhou, and G.-C. Guo, “Vector magneticfield sensing by a single nitrogen vacancy center in diamond,” EPL, vol. 101, p. 67003, Mar.2013
Pfirrmann, Marco [Verfasser], and M. [Akademischer Betreuer] Weides. "Adding nonlinearity to an electromagnetic-magnonic quantum hybrid device / Marco Pfirrmann ; Betreuer: M. Weides." Karlsruhe : KIT-Bibliothek, 2019. http://d-nb.info/1201414881/34.
Повний текст джерелаNUZZI, DAVIDE. "Hybrid scheme for magnetic-based quantum devices." Doctoral thesis, 2017. http://hdl.handle.net/2158/1087755.
Повний текст джерелаYang, Chi-Yu, and 楊基佑. "Organic and Hybrid Light Emission Devices Utilizing Delay Fluorescent and Quantum-Dot Emitter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4ge95k.
Повний текст джерела國立交通大學
光電工程研究所
104
In this thesis, We studied the device engineering and photophysical properties of delay fluorescent materials, quantum dots and inorganic halide perovskite light-emitting devices. In the introduction, We briefly reviewed the applications and current development of organic light-emitting diodes (OLEDs) for solid-state lighting and display. In the second chapter, We reviewed the history of OLEDs, and their operating principles and measurement methodology. In the third chapter, We investigated two novel excimer-formation materials, and studied the characteristics of the excimer emission. Careful transient photophysical measurements revealed the exciton up-conversion from triplet states to singlet states. The excimer-base OLEDs were fabricated and optimized by judicious selection of the electron transport materials. The device showed an external quantum efficiency (EQE) up to 6.5%, which is higher than the theoretical efficiency of the conventional fluorescent OLEDs. In the fourth chapter, We measured the photoluminescence (PL) quantum yield of the quantum dots (QDs). And fabricated quantum dot light-emitting devices by blending QDs with Tris(4-carbazoyl-9-ylphenyl)amine (TCTA) as an emission layer. Vertical phase separation between QDs and TCTA was observed .The device with lowest QDs concentration possessed the highest EQE of 0.62%. In the fifth chapter, We studied a series of thermally activated delayed fluorescence materials, of which the emission colors range from green to deep-blue. Large bandgap materials were selected as their host materials. We measured the temperature-dependent transient PL to analyze the delay fluorescence characteristics of these compounds. The efficient deep-blue OLEDs with International Commission on Illumination (CIE) coordinates of (0.18, 0.14) and a EQE up to 6.5% were demonstrated. In chapter six, Cesium Lead halide Perovskite films were deposited by dual source thermal evaporation. We further studied the charge transport and emission characteristics of Cesium Lead halide Perovskites. Finally, We demonstrated organic-inorganic hybrid light-emitting devices.
Pate, Ryan Jared. "Matrix-Assisted Pulsed Laser Evaporation of Conjugated Polymer and Hybrid Nanocomposite Thin Films: A Novel Deposition Technique for Organic Optoelectronic Devices." Diss., 2011. http://hdl.handle.net/10161/5664.
Повний текст джерелаThis dissertation develops a novel application of the resonant-infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE) technique toward the end goal of conjugated-polymer-based optoelectronic device fabrication. Conjugated polymers are attractive materials that are being investigated in the development of efficient optoelectronic devices due to their inexpensive material costs. Moreover, they can easily be combined with inorganic nanomaterials, such as colloidal quantum dots (CQDs), so as to realize hybrid nanocomposite-based optoelectronic devices with tunable optoelectronic characteristics and enhanced desirable features. One of the most significant challenges to the realization of optimal conjugated polymer-CQD hybrid nanocomposite-based optoelectronics has been the processes by which these materials are deposited as thin films, that is, conjugated polymer thin film processing techniques lack sufficient control so as to maintain preferred optoelectronic device behavior. More specifically, conjugated-polymer-based optoelectronics device operation and efficiency are a function of several attributes, including surface film morphology, internal polymer chain morphology, and the distribution and type of nanomaterials in the film bulk. Typical conjugated-polymer thin-film fabrication methodologies involve solution-based deposition, and the presence of the solvent has a deleterious impact, resulting in films with poor charge transport properties and subsequently poor device efficiencies. In addition, many next-generation conjugated polymer-based optoelectronics will require multi-layer device architectures, which can be difficult to achieve using traditional solution processing techniques. These issues direct the need for the development of a new polymer thin film processing technique that is less susceptible to solvent-related polymer chain morphology problems and is more capable of achieving better controlled nanocomposite thin films and multi-layer heterostructures comprising a wide range of materials. Therefore, this dissertation describes the development of a new variety of RIR-MAPLE that uses a unique target emulsion technique to address the aforementioned challenges.
The emulsion-based RIR-MAPLE technique was first developed for the controlled deposition of the conjugated polymers poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) and poly[2-methoxy-5-(2'ethylhexyloxy)-1,4-(1-cyanovinylene) phenylene] (MEH-CN-PPV) into homogenous thin films. Therein, it was identified that target composition had the most significant influence on film surface morphology, and by tuning the concentration of hydroxyl bonds in the target bulk, the laser-target absorption depth could be tuned so as to yield more or less evaporative deposition, resulting in films with tunable surface morphologies and optical behaviors.
Next, the internal morphologies of emulsion-based RIR-MAPLE-deposited MEH-PPV thin films were investigated by measuring their hole drift mobilities using the time-of-flight (TOF) photoconductivity method in the context of amorphous materials disorder models (Bässler's Gaussian Disorder model and the Correlated Disorder model) in order to provide a quantitative measure of polymer chain packing. The polymer chain packing of the RIR-MAPLE-deposited films was demonstrated to be superior and more conducive to charge transport in comparison to spin-cast and drop-cast MEH-PPV films, yielding enhanced hole mobilities.
The emulsion-based RIR-MAPLE technique was also developed for the deposition of different classes of inorganic nanoparticles, namely un-encapsulated nanoparticles and ligand-encapsulated nanoparticles. These different classes of nanoparticles were identified to have different film growth regimes, such that either rough or smooth films were obtained, respectively. The ligand-encapsulated nanoparticles were then co-deposited with MEH-PPV as conjugated polymer-CQD hybrid nanocomposites, wherein the distributions of the constituent materials in the film bulk were identified to be tunable, from homogeneous to highly clustered. The RIR-MAPLE deposition regime determined the said distributions, that is, if the polymer and CQDs were sequentially deposited from a sectioned target or simultaneously deposited from a single target, respectively. The homogeneous conjugated polymer-CQD nanocomposites were also investigated in terms of their charge transport properties using the TOF photoconductivity technique, where it was identified that despite the enhanced dispersion of CQDs in the film bulk, the presence of a high concentration of CQDs degraded hole drift mobility, which indicates that special considerations must be taken when incorporating CQDs into conjugated-polymer-based nanocomposite optoelectronics.
Finally, the unique capability of RIR-MAPLE to enable novel conjugated polymer-based optical heterostructures and optoelectronic devices was evaluated by the successful demonstration of a conjugated polymer-based distributed Bragg reflector (DBR), a plasmonic absorption enhancement layer, and a conjugated polymer-based photovoltaic solar cell featuring a novel electron-transporting layer. These optical heterostructures and optoelectronic devices demonstrate that all of the constituent polymer and nanocomposite layers have controllable thicknesses and abrupt interfaces, thereby confirming the capability of RIR-MAPLE to achieve multi-layer, conjugated polymer-based heterostructures and device architectures that are appropriate for enhancing specific desired optical behaviors and optoelectronic device efficiencies.
Dissertation
Varade, Vaibhav. "Charge Transport and Photo-Physical Studies in Conjugated Polymers, Hybrid Nanocomposites and Devices." Thesis, 2014. http://etd.iisc.ernet.in/handle/2005/2911.
Повний текст джерелаMajumdar, Kausik. "Device Structure And Material Exploration For Nanoscale Transistor." Thesis, 2011. http://etd.iisc.ernet.in/handle/2005/2097.
Повний текст джерелаChung, Cheng Hsiao, and 鄭孝忠. "The Study of Nanoporous Silicon and Quantum dot/Nanoporous Silicon Hybrid Photodetector Device." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/58345202569964397685.
Повний текст джерела國立暨南國際大學
光電科技碩士學位學程在職專班
100
In recent decades, variety of the porous silicon material components was highly discussed, investigated, & intentional developed, such as photo detectors, light emitting diodes, and solar cells.As for this case study focus the surface of the silicon substrate on its electrochemical etching experiments, together utilizing the material properties of porous silicon to further improved the rate of light absorption, thereby increasing degrees of its responsively. However, the use of the current density adjustment, by etching of the different holes in its correspondences, further through the optical conductivity measurement methodology of its ongoing light reflection & measurement. In contrast, the strength characteristics of the porous silicon surface area on its volume ratio, achieved better performance in light absorption. Simultaneously, carrying out nanoparticle quantum dots, appropriately implementing correspondent holes, moreover, further highlighted the light response degrees in the optical absorption spectrums via the phenomenon of the Band-gap Alignment, as in further illustrated the porous silicon of hybrid quantum dot will significantly improve its responsiveness. In concluded the experiment & findings of this case study, I strongly believed the porous silicon of its future application by ways of porous silicon optical sensors developments will play a great assist enhancement in a new coming era.