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Journal articles on the topic 'Methylammonium Lead Halide'

Author: Grafiati
Published: 6 September 2023

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1

Chen, Xihan, Haipeng Lu, Ye Yang, and Matthew C. Beard. "Excitonic Effects in Methylammonium Lead Halide Perovskites." Journal of Physical Chemistry Letters 9, no. 10 (May 2018): 2595–603. http://dx.doi.org/10.1021/acs.jpclett.8b00526.

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2

Freppon, Daniel J., Long Men, Sadie J. Burkhow, Jacob W. Petrich, Javier Vela, and Emily A. Smith. "Photophysical properties of wavelength-tunable methylammonium lead halide perovskite nanocrystals." Journal of Materials Chemistry C 5, no. 1 (2017): 118–26. http://dx.doi.org/10.1039/c6tc03886g.

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3

Malgras, Victor, Joel Henzie, Toshiaki Takei, and Yusuke Yamauchi. "Hybrid methylammonium lead halide perovskite nanocrystals confined in gyroidal silica templates." Chemical Communications 53, no. 15 (2017): 2359–62. http://dx.doi.org/10.1039/c6cc10245j.

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4

Mali, Sawanta S., Jyoti V. Patil, Hamidreza Arandiyan, and Chang Kook Hong. "Reduced methylammonium triple-cation Rb0.05(FAPbI3)0.95(MAPbBr3)0.05 perovskite solar cells based on a TiO2/SnO2 bilayer electron transport layer approaching a stabilized 21% efficiency: the role of antisolvents." Journal of Materials Chemistry A 7, no. 29 (2019): 17516–28. http://dx.doi.org/10.1039/c9ta05422g.

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5

García, Teresa, Rocío García-Aboal, Josep Albero, Pedro Atienzar, and Hermenegildo García. "Vapor-Phase Photocatalytic Overall Water Splitting Using Hybrid Methylammonium Copper and Lead Perovskites." Nanomaterials 10, no. 5 (May 18, 2020): 960. http://dx.doi.org/10.3390/nano10050960.

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Films or powders of hybrid methylammonium copper halide perovskite exhibit photocatalytic activity for overall water splitting in the vapor phase in the absence of any sacrificial agent, resulting in the generation of H2 and O2, reaching a maximum production rate of 6 μmol H2 × g cat−1h−1 efficiency. The photocatalytic activity depends on the composition, degreasing all inorganic Cs2CuCl2Br2 perovskite and other Cl/Br proportions in the methylammonium hybrids. XRD indicates that MA2CuCl2Br2 is stable under irradiation conditions in agreement with the linear H2 production with the irradiation time. Similar to copper analogue, hybrid methylammonium lead halide perovskites also promote the overall photocatalytic water splitting, but with four times less efficiency than the Cu analogues. The present results show that, although moisture is strongly detrimental to the photovoltaic applications of hybrid perovskites, it is still possible to use these materials as photocatalysts for processes requiring moisture due to the lack of relevance in the photocatalytic processes of interparticle charge migration.
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6

Wang, Tianyi, Benjamin Daiber, Jarvist M. Frost, Sander A. Mann, Erik C. Garnett, Aron Walsh, and Bruno Ehrler. "Indirect to direct bandgap transition in methylammonium lead halide perovskite." Energy & Environmental Science 10, no. 2 (2017): 509–15. http://dx.doi.org/10.1039/c6ee03474h.

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Unusually long charge carrier lifetime in methylammonium lead halide perovskites is a result of the Rashba-split indirect bandgap. At high pressure the bandgap becomes purely direct, with shorter carrier lifetime and higher radiative efficiency.
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Zhou, Jiyu, Na Lei, Huiqiong Zhou, Yuan Zhang, Zhiyong Tang, and Lei Jiang. "Understanding the temperature-dependent charge transport, structural variation and photoluminescent properties in methylammonium lead halide perovskite single crystals." Journal of Materials Chemistry C 6, no. 24 (2018): 6556–64. http://dx.doi.org/10.1039/c8tc01717d.

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8

Jha, Abha, Hari Shankar, Sandeep Kumar, Muniappan Sankar, and Prasenjit Kar. "Efficient charge transfer from organometal lead halide perovskite nanocrystals to free base meso-tetraphenylporphyrins." Nanoscale Advances 4, no. 7 (2022): 1779–85. http://dx.doi.org/10.1039/d1na00835h.

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9

Capitaine, Anna, and Beniamino Sciacca. "Monocrystalline Methylammonium Lead Halide Perovskite Materials for Photovoltaics." Advanced Materials 33, no. 52 (October 15, 2021): 2102588. http://dx.doi.org/10.1002/adma.202102588.

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10

Klein, Eugen, Andres Black, Öznur Tokmak, Christian Strelow, Rostyslav Lesyuk, and Christian Klinke. "Micron-Size Two-Dimensional Methylammonium Lead Halide Perovskites." ACS Nano 13, no. 6 (June 7, 2019): 6955–62. http://dx.doi.org/10.1021/acsnano.9b01907.

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11

Geng, Chong, Shu Xu, Haizheng Zhong, Andrey L. Rogach, and Wengang Bi. "Aqueous Synthesis of Methylammonium Lead Halide Perovskite Nanocrystals." Angewandte Chemie 130, no. 31 (July 4, 2018): 9798–802. http://dx.doi.org/10.1002/ange.201802670.

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12

Geng, Chong, Shu Xu, Haizheng Zhong, Andrey L. Rogach, and Wengang Bi. "Aqueous Synthesis of Methylammonium Lead Halide Perovskite Nanocrystals." Angewandte Chemie International Edition 57, no. 31 (July 4, 2018): 9650–54. http://dx.doi.org/10.1002/anie.201802670.

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13

Nguyen-Tran, Thuat, Mai Ngoc An, Trang Thu Luong, Hung Huy Nguyen, and Tu Thanh Truong. "Growth of single crystals of methylammonium lead mixedhalide perovskites." Communications in Physics 28, no. 3 (November 14, 2018): 237. http://dx.doi.org/10.15625/0868-3166/28/3/12666.

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We report the growth and characterization of different bulk single crystals of organo lead mixed halide perovskites CH3NH3PbI3−xBrx by two different crystal growth approaches: (i)anti-solvent diffusion, and (ii) inverse temperature crystallization. In order to control the size and the shape of crystals, we have investigated different experimental growth parameters such as temperature and precursor concentration. The morphology of obtained crystals was observed by optical microscope, whereas their intrinsic crystalline properties were characterized by single crystal as well as powder X-ray diffraction. The results illustrated that the growth and crystalline structure of mixed halide perovskites CH3NH3PbI3−xBrx could be easily tuned.
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14

Petrović, Miloš, Temur Maksudov, Apostolos Panagiotopoulos, Efthymis Serpetzoglou, Ioannis Konidakis, Minas M. Stylianakis, Emmanuel Stratakis, and Emmanuel Kymakis. "Limitations of a polymer-based hole transporting layer for application in planar inverted perovskite solar cells." Nanoscale Advances 1, no. 8 (2019): 3107–18. http://dx.doi.org/10.1039/c9na00246d.

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15

Bernard, Guy M., Roderick E. Wasylishen, Christopher I. Ratcliffe, Victor Terskikh, Qichao Wu, Jillian M. Buriak, and Tate Hauger. "Methylammonium Cation Dynamics in Methylammonium Lead Halide Perovskites: A Solid-State NMR Perspective." Journal of Physical Chemistry A 122, no. 6 (February 2, 2018): 1560–73. http://dx.doi.org/10.1021/acs.jpca.7b11558.

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16

Sanches, Alonso W. P., Marco A. T. da Silva, Neusmar J. A. Cordeiro, Alexandre Urbano, and Sidney A. Lourenço. "Effect of intermediate phases on the optical properties of PbI2-rich CH3NH3PbI3 organic–inorganic hybrid perovskite." Physical Chemistry Chemical Physics 21, no. 9 (2019): 5253–61. http://dx.doi.org/10.1039/c8cp06916f.

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17

Solari, Simon F., Sudhir Kumar, Jakub Jagielski, Nikolas M. Kubo, Frank Krumeich, and Chih-Jen Shih. "Ligand-assisted solid phase synthesis of mixed-halide perovskite nanocrystals for color-pure and efficient electroluminescence." Journal of Materials Chemistry C 9, no. 17 (2021): 5771–78. http://dx.doi.org/10.1039/d0tc04667a.

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We have developed a new post-synthetic approach, ligand-assisted solid phase synthesis (LASPS), to tune the optical properties of colloidal methylammonium lead halide perovskite nanocrystals with color-pure electroluminescence.
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18

Borchert, Juliane, Heidi Boht, Wolfgang Fränzel, René Csuk, Roland Scheer, and Paul Pistor. "Structural investigation of co-evaporated methyl ammonium lead halide perovskite films during growth and thermal decomposition using different PbX2 (X = I, Cl) precursors." Journal of Materials Chemistry A 3, no. 39 (2015): 19842–49. http://dx.doi.org/10.1039/c5ta04944j.

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19

Djokić, Veljko, Pavao Andričević, Márton Kollár, Anastasiia Ciers, Alla Arakcheeva, Milica Vasiljević, Dragan Damjanović, László Forró, Endre Horváth, and Trpimir Ivšić. "Fast Lead-Free Humidity Sensor Based on Hybrid Halide Perovskite." Crystals 12, no. 4 (April 14, 2022): 547. http://dx.doi.org/10.3390/cryst12040547.

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An environmentally friendly analog of the prominent methylammonium lead halide perovskite, methylammonium bismuth bromide (MA3Bi2Br9), was prepared and investigated in the form of powder, single crystals and nanowires. Complete characterization via synchrotron X-ray diffraction data showed that the bulk crystal does not incorporate water into the structure. At the same time, water is absorbed on the surface of the crystal, and this modification leads to the changes in the resistivity of the material, thus making MA3Bi2Br9 an excellent candidate for use as a humidity sensor. The novel sensor was prepared from powder-pressed pellets with attached carbon electrodes and was characterized by being able to detect relative humidity over the full range (0.7–96% RH) at ambient temperature. Compared to commercial and literature values, the response and recovery times are very fast (down to 1.5 s/1.5 s).
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20

Mydhili, B., Ancy Albert, and C. O. Sreekala. "Mixed Organic Halide Perovskite Energy Harvester for Solar Cells." Journal of Physics: Conference Series 2426, no. 1 (February 1, 2023): 012044. http://dx.doi.org/10.1088/1742-6596/2426/1/012044.

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Abstract Organic- inorganic hybrid perovskite shows promising properties such as optical, electrical, and magnetic. To address issues in the standard methylammonium lead iodide perovskite such as toxicity and stability, lead was replaced with Cu in metal ion part and iodine replaced by chlorine in the anionic position. In this work, methyl ammonium copper chloride (MA2CuCl4) and phenyl ethyl ammonium copper chloride (PEA2CuCl4) were synthesised. Optical and structural property variations of solution obtained by mixing MA2CuCl4 and PEA2CuCl4 in 1:1 ratio was studied. Methylammonium lead iodide has a wide range of applications, particularly in solar cells and photovoltaic systems. Phenylethyl ammonium copper chloride material exhibits both ferroelectric and ferromagnetic properties. Methylammonium copper chloride is hygroscopic and unstable. To increase the stability of the material the organic part can be replaced with higher-order functional groups. Phenylethyl ammonium copper chloride is found to be thermally stable and has more moisture resistance ability compared to methyl ammonium copper chloride. From angle of efficiency, methyl ammonium copper chloride possessed higher performance than phenylethyl ammonium copper chloride, particularly in the field of solar cell perovskites. Uv-vis spectroscopy, FE-SEM, XRD, FTIR characterizations were done.
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21

Kim, Hyojung, Hye Ryung Byun, Bora Kim, Sung Hyuk Kim, Hye Min Oh, and Mun Seok Jeong. "Polymer Passivation Effect on Methylammonium Lead Halide Perovskite Photodetectors." Journal of the Korean Physical Society 73, no. 11 (December 2018): 1675–78. http://dx.doi.org/10.3938/jkps.73.1675.

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22

Franssen, Wouter M. J., Sverre G. D. van Es, Rıza Dervişoğlu, Gilles A. de Wijs, and Arno P. M. Kentgens. "Symmetry, Dynamics, and Defects in Methylammonium Lead Halide Perovskites." Journal of Physical Chemistry Letters 8, no. 1 (December 12, 2016): 61–66. http://dx.doi.org/10.1021/acs.jpclett.6b02542.

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23

Yuyama, Ken-ichi, Md Jahidul Islam, Kiyonori Takahashi, Takayoshi Nakamura, and Vasudevanpillai Biju. "Crystallization of Methylammonium Lead Halide Perovskites by Optical Trapping." Angewandte Chemie 130, no. 41 (September 12, 2018): 13612–16. http://dx.doi.org/10.1002/ange.201806079.

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24

Yuyama, Ken-ichi, Md Jahidul Islam, Kiyonori Takahashi, Takayoshi Nakamura, and Vasudevanpillai Biju. "Crystallization of Methylammonium Lead Halide Perovskites by Optical Trapping." Angewandte Chemie International Edition 57, no. 41 (September 12, 2018): 13424–28. http://dx.doi.org/10.1002/anie.201806079.

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25

Nagabhushana, G. P., Radha Shivaramaiah, and Alexandra Navrotsky. "Direct calorimetric verification of thermodynamic instability of lead halide hybrid perovskites." Proceedings of the National Academy of Sciences 113, no. 28 (June 28, 2016): 7717–21. http://dx.doi.org/10.1073/pnas.1607850113.

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Hybrid perovskites, especially methylammonium lead iodide (MAPbI3), exhibit excellent solar power conversion efficiencies. However, their application is plagued by poor chemical and structural stability. Using direct calorimetric measurement of heats of formation, MAPbI3 is shown to be thermodynamically unstable with respect to decomposition to lead iodide and methylammonium iodide, even in the absence of ambient air or light or heat-induced defects, thus limiting its long-term use in devices. The formation enthalpy from binary halide components becomes less favorable in the order MAPbCl3, MAPbBr3, MAPbI3, with only the chloride having a negative heat of formation. Optimizing the geometric match of constituents as measured by the Goldschmidt tolerance factor provides a potentially quantifiable thermodynamic guide for seeking chemical substitutions to enhance stability.
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26

Tombe, Sekai, Getachew Adam, Herwig Heilbrunner, Dogukan Hazar Apaydin, Christoph Ulbricht, Niyazi Serdar Sariciftci, Christopher J. Arendse, Emmanuel Iwuoha, and Markus C. Scharber. "Optical and electronic properties of mixed halide (X = I, Cl, Br) methylammonium lead perovskite solar cells." Journal of Materials Chemistry C 5, no. 7 (2017): 1714–23. http://dx.doi.org/10.1039/c6tc04830g.

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We report on the fabrication and opto-electronic characterization of solution-processed planar heterojunction perovskite solar cells based on methylammonium (MA) lead halide derivatives, MAPbI3−xYx(Y = Cl, Br, I).
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27

Ma, Zi-Qian, Xiuli Zhu, and Chuanhui Wang. "Design of Lead Hybrid Halide Perovskite for Solar Cells." Journal of Physics: Conference Series 2473, no. 1 (April 1, 2023): 012022. http://dx.doi.org/10.1088/1742-6596/2473/1/012022.

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Abstract Hybrid organic-inorganic halide perovskites solar cells have attracted extensive interest because of their outstanding properties, including an optimal band gap, high carrier mobility, and excellent optoelectronic merits. We study the electronic and crystal structural properties of hybrid organic-inorganic halide APbX3 (A = Cs, methylammonium (MA), formamidinium (FA), X = I, Br) perovskites using first-principles calculations based on density functional theory. We find that halide atoms and A-site cations strongly affect their structural and electronic properties. The radius of a halide atom and the size of an organic molecule determine their lattice parameters and bond length. A relatively large halide atom can increase the value of the lattice parameters (a and b). Meanwhile, the electronic properties (band gap & carrier effective mass) of the Pb-based hybrid halide APbX3 can be effectively modified by adopting appropriate A- and X-site atoms or organic sections. We predict that HOIPs may have outstanding potential in solar light harvesting with promoted power conversion efficiency due to a tunable band gap and excellent electronic properties.
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28

Jong, Un-Gi, Chol-Jun Yu, Gum-Chol Ri, Andrew P. McMahon, Nicholas M. Harrison, Piers R. F. Barnes, and Aron Walsh. "Influence of water intercalation and hydration on chemical decomposition and ion transport in methylammonium lead halide perovskites." Journal of Materials Chemistry A 6, no. 3 (2018): 1067–74. http://dx.doi.org/10.1039/c7ta09112e.

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The application of methylammonium (MA) lead halide perovskites, CH3NH3PbX3 (X = I, Br, Cl), in perovskite solar cells has made great recent progress in performance efficiency during recent years.
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29

Ruan, Shuai, Jianfeng Lu, Narendra Pai, Heike Ebendorff-Heidepriem, Yi-Bing Cheng, Yinlan Ruan, and Christopher R. McNeill. "An optical fibre-based sensor for the detection of gaseous ammonia with methylammonium lead halide perovskite." Journal of Materials Chemistry C 6, no. 26 (2018): 6988–95. http://dx.doi.org/10.1039/c8tc01552j.

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30

Wu, Guangbao, Jiyu Zhou, Rui Meng, Baoda Xue, Huiqiong Zhou, Zhiyong Tang, and Yuan Zhang. "Air-stable formamidinium/methylammonium mixed lead iodide perovskite integral microcrystals with low trap density and high photo-responsivity." Physical Chemistry Chemical Physics 21, no. 6 (2019): 3106–13. http://dx.doi.org/10.1039/c8cp07271j.

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Here based on integral microcrystals (IMC) of halide perovskites containing formamidinium (FA)/methylammonium (MA) mixed cations, we investigate the impact of the addition of MAPbBr3 on the stability and optoelectronic properties in FA-based IMC films.
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31

Zhang, Yi, Fuqiang Huang, and Qixi Mi. "Preferential Facet Growth of Methylammonium Lead Halide Single Crystals Promoted by Halide Coordination." Chemistry Letters 45, no. 8 (August 5, 2016): 1030–32. http://dx.doi.org/10.1246/cl.160419.

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32

Su, Li, Zhenxuan Zhao, Huayang Li, Ying Wang, Shuangyang Kuang, Guozhong Cao, Zhonglin Wang, and Guang Zhu. "Photoinduced enhancement of a triboelectric nanogenerator based on an organolead halide perovskite." Journal of Materials Chemistry C 4, no. 43 (2016): 10395–99. http://dx.doi.org/10.1039/c6tc03513b.

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33

Game, Onkar S., Joel A. Smith, Tarek I. Alanazi, Michael Wong-Stringer, Vikas Kumar, Cornelia Rodenburg, Nick J. Terrill, and David G. Lidzey. "Solvent vapour annealing of methylammonium lead halide perovskite: what's the catch?" Journal of Materials Chemistry A 8, no. 21 (2020): 10943–56. http://dx.doi.org/10.1039/d0ta03023f.

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Solvent vapour annealing of hybrid perovskite films leads to stoichiometric changes, which adversely affect the photovoltaic device stability. This can be partially mitigated by incorporation of excess organic halide into the precursor solution.
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34

Johnson, Justin C., Zhen Li, Paul F. Ndione, and Kai Zhu. "Third-order nonlinear optical properties of methylammonium lead halide perovskite films." Journal of Materials Chemistry C 4, no. 22 (2016): 4847–52. http://dx.doi.org/10.1039/c6tc01436d.

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We report third-order nonlinear coefficient values and decay time kinetics vs. halide composition (CH3NH3PbBr3 and CH3NH3PbBr2I), temperature, and excitation wavelength.
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35

Leguy, Aurélien M. A., Pooya Azarhoosh, M. Isabel Alonso, Mariano Campoy-Quiles, Oliver J. Weber, Jizhong Yao, Daniel Bryant, et al. "Experimental and theoretical optical properties of methylammonium lead halide perovskites." Nanoscale 8, no. 12 (2016): 6317–27. http://dx.doi.org/10.1039/c5nr05435d.

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36

Chanana, Ashish, Xiaojie Liu, Chuang Zhang, Zeev Valy Vardeny, and Ajay Nahata. "Ultrafast frequency-agile terahertz devices using methylammonium lead halide perovskites." Science Advances 4, no. 5 (May 2018): eaar7353. http://dx.doi.org/10.1126/sciadv.aar7353.

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37

Khoram, Parisa, Sebastian Z. Oener, Qianpeng Zhang, Zhiyong Fan, and Erik C. Garnett. "Surface recombination velocity of methylammonium lead bromide nanowires in anodic aluminium oxide templates." Molecular Systems Design & Engineering 3, no. 5 (2018): 723–28. http://dx.doi.org/10.1039/c8me00035b.

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38

Uratani, Hiroki, Chien-Pin Chou, and Hiromi Nakai. "Quantum mechanical molecular dynamics simulations of polaron formation in methylammonium lead iodide perovskite." Physical Chemistry Chemical Physics 22, no. 1 (2020): 97–106. http://dx.doi.org/10.1039/c9cp04739e.

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39

Barnett, Jeremy L., Vivien L. Cherrette, Connor J. Hutcherson, and Monica C. So. "Effects of Solution-Based Fabrication Conditions on Morphology of Lead Halide Perovskite Thin Film Solar Cells." Advances in Materials Science and Engineering 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/4126163.

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We present a critical review of the effects of processing conditions on the morphology of methylammonium lead iodide (CH3NH3PbI3) perovskite solar cells. Though difficult to decouple from synthetic and film formation effects, a single morphological feature, specifically grain size, has been evidently linked to the photovoltaic performance of this class of solar cells. Herein, we discuss experimental aspects of optimizing the (a) temperature and time of annealing, (b) spin-coating parameters, and (c) solution temperature of methylammonium iodide (MAI) solution.
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40

Joo, Sung Hwan, Il Tae Kim, and Hyung Wook Choi. "Characteristics of Perovskite Solar Cells with Methylammonium Iodide-Added Anti-Solvent." Journal of Nanoscience and Nanotechnology 21, no. 8 (August 1, 2021): 4367–71. http://dx.doi.org/10.1166/jnn.2021.19408.

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The perovskite film—manufactured via a one-step method—was superficially improved through an anti-solvent process to increase solar cell efficiency. Although perovskite synthesis proceeds rapidly, a significant amount of lead iodide residue remains. Well-placed lead iodide in perovskite grains prevents electron–hole recombination; however, when irregularly placed, it interferes with the movement of electron and holes. In this study, we focused on improving the crystallinity of the perovskite layer, as well as reducing lead iodide residues by adding a methylammonium halide material to the anti-solvent. Methylammonium iodide in chlorobenzene used as an anti-solvent reduces lead iodide residues and improves the crystallinity of formamidinium lead iodide perovskite. The improved crystallinity of the perovskite layer increased the absorbance and, with reduced lead iodide residues, increased the efficiency of the perovskite solar cell by 1.914%.
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41

Qian, Feng, Jue Gong, Mingyu Hu, Chunyu Ge, Nitin P. Padture, Yuanyuan Zhou, and Jing Feng. "p–p orbital interaction via magnesium isovalent doping enhances optoelectronic properties of halide perovskites." Chemical Communications 56, no. 100 (2020): 15639–42. http://dx.doi.org/10.1039/d0cc02150d.

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42

Zhao, Shiping, Zhixuan Lv, Xuelin Guo, Chaoqian Liu, Hualin Wang, Weiwei Jiang, Shimin Liu, et al. "The Diffusion of Low-Energy Methyl Group on ITO Film Surface and Its Impact on Optical-Electrical Properties." Materials 11, no. 10 (October 16, 2018): 1991. http://dx.doi.org/10.3390/ma11101991.

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Indium tin oxide (ITO) film is one of the ideal candidates for transparent conductive cathode in methylammonium lead halide perovskite solar cells. Thus, the diffusion of methyl group in ITO film is inevitable, which could deteriorate the optical-electrical property of ITO film. In this study, ITO films with and without (100) preferred orientation were bombarded by the low-energy methyl group beam. After the bombardment, the optical-electrical property of ITO film without (100) preferred orientation deteriorated. The bombardment of methyl group had little influence on the optical-electrical property of ITO film with (100) preferred orientation. Finally, combining the crystallographic texture and chemical bond structure analysis, the diffusion mechanism of low-energy methyl group on ITO lattice and grain boundary, as well as the relation between the optical-electrical property and the diffusion of the methyl group, were discussed systematically. With the above results, ITO film with (100) preferred orientation could be an ideal candidate for transparent conductive cathode in methylammonium lead halide perovskite solar cells.
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43

Ben Haj Salah, Maroua, Justine Tessier, Nicolas Mercier, Magali Allain, Antonin Leblanc, Xiaoyang Che, Claudine Katan, and Mikael Kepenekian. "A 3D Lead Iodide Hybrid Based on a 2D Perovskite Subnetwork." Crystals 11, no. 12 (December 16, 2021): 1570. http://dx.doi.org/10.3390/cryst11121570.

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Lead halide perovskites have emerged as promising materials for various optoelectronic applications. For photovoltaics, the reference compound is the 3D perovskite (MA)PbI3 (MA+ = methylammonium). However, this material suffers from instabilities towards humidity or light. This makes the search of new stable 3D lead halide materials very relevant. A strategy is the use of intermediate size cations instead of MA, which are not suitable to form the 3D ABX3 perovskites or 2D perovskites. Here, we report on a novel 3D metal halide hybrid material based on the intermediate size cation hydroxypropylammonium (HPA+), (HPA)6(MA)Pb5I17. We will see that extending the carbon chain length from two CH2 units (in the hydroxylethylammonium cation, HEA+) to three (HPA+) precludes the formation of a perovskite network as found in the lead and iodide deficient perovskite (HEA,MA)1+xPbxI3−x. In (HPA)6(MA)Pb5I17 the 3D lead halide network results from a 2D perovskite subnetworks linked by a PbI6 octahedra sharing its faces. DFT calculations confirm the direct band gap and reveal the peculiar band structure of this 3D network. On one hand the valence band has a 1D nature involving the p orbitals of the halide. On the other, the conduction band possesses a clear 2D character involving hybridization between the p orbitals of the metal and the halide.
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44

Knop, Osvald, Roderick E. Wasylishen, Mary Anne White, T. Stanley Cameron, and Michiel J. M. Van Oort. "Alkylammonium lead halides. Part 2. CH3NH3PbX3 (X = Cl, Br, I) perovskites: cuboctahedral halide cages with isotropic cation reorientation." Canadian Journal of Chemistry 68, no. 3 (March 1, 1990): 412–22. http://dx.doi.org/10.1139/v90-063.

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Methylammonium lead(II) halides, CH3NH3PbX3 (X = Cl, Br, I), have been investigated by single-crystal X-ray diffraction, 2H and 14N nmr, adiabatic calorimetry, and other methods. The chloride (CL) has transitions at 171.5 and 177.4 K, the bromide (BR) at 148.4, 154.2, and 235.1 K, and the iodide (IO) at 162.7 and 326.6 K. The respective entropies of transition (J K−1 mol−1) are 11.0 and 5.1 for CL; 8.7, 3.4, and 5.3 for BR; and 16.1 and 1.9 for IO. The highest-temperature phase, phase I, of each halide is of the cubic (Pm3m) perovskite type. The cation in CL(I) and BR(I) could not be localized in the electron density maps; the thermal motion of the halogen atom is highly anisotropic. The ln T1(2H) vs. T−1 plots (N-deuterated samples as well as CD3NH3PbCl3) show significant departures from linearity: the temperature variation of T1(2H) in BR(II) and IO(II) can be represented by functions of the type ln T1(H) = k0 − k2T−2, which give adequate analytical representations of T1(2H) and T1(14N) in phase I as well. On cooling, BR(II) and IO(II) exhibit small quadrupole splittings QS(2H), which can be represented to a high degree of correlation by QS(2H) = k(Ttr − T)n, i.e. they appear to exhibit critical behaviour with respect to T. The 14N nmr results indicate that the C—N bond in phase I reorientates in an isotropic potential at a rate approaching that of the freely rotating methylammonium ion. Below phase I this motion takes place in an increasingly anisotropic potential in BR(II) and IO(II) and is essentially arrested in CL(II), BR(III), and IO(III). The temperature dependence of the activation energy Ea for the cation reorientation and other aspects of the non-Arrhenius behaviour are discussed, and the CH3NH3PbX3 perovskites are compared with the corresponding (CH3NH3)2TeX6 halides, utilizing preliminary 2H nmr results on (CH3ND3)2TeBr6. The electrical conductivity, between 0 and 95 °C, of CH3NH3PbI3 increases with temperature and exhibits no discontinuity at Ttr = 326.6 K; the activation energy for the conduction process is estimated as ~0.4 eV. Keywords: crystal structure, MeNH3PbCl3 and MeNH3PbBr3; heat capacity, MeNH3PbX3 (X = Cl, Br, I); methylammonium lead halides; solid-state NMR, 2H and 14N; spin-lattice relaxation, non-Arrhenius behaviour.
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45

Deng, Liangliang, Hanjun Yang, Ruiheng Pan, Haomiao Yu, Jinpeng Li, Ling Xu, and Kai Wang. "Achieving 20% photovoltaic efficiency by manganese doped methylammonium lead halide perovskites." Journal of Energy Chemistry 60 (September 2021): 376–83. http://dx.doi.org/10.1016/j.jechem.2021.01.028.

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46

McKenna, Barry, Abhinav Shivkumar, Bethan Charles, and Rachel C. Evans. "Synthetic factors affecting the stability of methylammonium lead halide perovskite nanocrystals." Nanoscale 12, no. 21 (2020): 11694–702. http://dx.doi.org/10.1039/d0nr03227a.

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The stability and reproducibility of perovskite nanocrystals produced by ligand-assisted reprecipitation (LARP) is investigated. Significant differences in optical properties and morphology are seen depending on specific synthetic factors.
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47

Plugaru, Neculai, George Alexandru Nemnes, Lucian Filip, Ioana Pintilie, Lucian Pintilie, Keith Tobias Butler, and Andrei Manolescu. "Atomistic Simulations of Methylammonium Lead Halide Layers on PbTiO3(001) Surfaces." Journal of Physical Chemistry C 121, no. 17 (April 19, 2017): 9096–109. http://dx.doi.org/10.1021/acs.jpcc.7b00399.

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48

Mirershadi, Soghra, Farhad Sattari, Shahla Golghasemi Sorkhabi, and Amir Masoud Shokri. "Pressure-Induced Optical Band Gap Transition in Methylammonium Lead Halide Perovskites." Journal of Physical Chemistry C 123, no. 19 (April 24, 2019): 12423–28. http://dx.doi.org/10.1021/acs.jpcc.9b02744.

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49

Glaser, Tobias, Christian Müller, Michael Sendner, Christian Krekeler, Octavi E. Semonin, Trevor D. Hull, Omer Yaffe, et al. "Infrared Spectroscopic Study of Vibrational Modes in Methylammonium Lead Halide Perovskites." Journal of Physical Chemistry Letters 6, no. 15 (July 13, 2015): 2913–18. http://dx.doi.org/10.1021/acs.jpclett.5b01309.

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50

Freestone, Benjamin G., Joel A. Smith, Giacomo Piana, Rachel C. Kilbride, Andrew J. Parnell, Luca Sortino, David M. Coles, et al. "Low-dimensional emissive states in non-stoichiometric methylammonium lead halide perovskites." Journal of Materials Chemistry A 7, no. 18 (2019): 11104–16. http://dx.doi.org/10.1039/c8ta12184b.

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