Pressure-Induced Phase Transformation, Reversible Amorphization, and Anomalous Visible Light Response in Organolead Bromide Perovskite
Yonggang Wang,Yonggang Wang,Yonggang Wang,Xujie Lü,Wenge Yang,Ting Wen,Liuxiang Yang,Xiangting Ren,Lin Wang,Zheshuai Lin,Yusheng Zhao +10 more
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TLDR
The results not only show that hydrostatic pressure may provide an applicable tool for the organohalide perovskites based photovoltaic device functioning as switcher or controller, but also shed light on the exploration of more amorphous organometal composites as potential light absorber.Abstract:
Hydrostatic pressure, as an alternative of chemical pressure to tune the crystal structure and physical properties, is a significant technique for novel function material design and fundamental research. In this article, we report the phase stability and visible light response of the organolead bromide perovskite, CH3NH3PbBr3 (MAPbBr3), under hydrostatic pressure up to 34 GPa at room temperature. Two phase transformations below 2 GPa (from Pm3m to Im3, then to Pnma) and a reversible amorphization starting from about 2 GPa were observed, which could be attributed to the tilting of PbBr6 octahedra and destroying of long-range ordering of MA cations, respectively. The visible light response of MAPbBr3 to pressure was studied by in situ photoluminescence, electric resistance, photocurrent measurements and first-principle simulations. The anomalous band gap evolution during compression with red-shift followed by blue-shift is explained by the competition between compression effect and pressure-induced amorph...read more
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Two-Dimensional Hybrid Halide Perovskites: Principles and Promises.
TL;DR: This Perspective begins with a historical flashback to early reports before the "perovskite fever", and follows this original work to its fruition in the present day, where 2D halide perovskites are in the spotlight of current research, offering characteristics desirable in high-performance optoelectronics.
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Chemically diverse and multifunctional hybrid organic–inorganic perovskites
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Highly Emissive Divalent Ion Doped Colloidal CsPb1–xMxBr3 Perovskite Nanocrystals through Cation Exchange
Ward van der Stam,Jaco J. Geuchies,Thomas Altantzis,Karel H. W. van den Bos,Johannes D. Meeldijk,Sandra Van Aert,Sara Bals,Daniel Vanmaekelbergh,Celso de Mello Donegá +8 more
TL;DR: This work presents a method that allows partial cation exchange in colloidal CsPbBr3 NCs, whereby Pb2+ is exchanged for several isovalent cations, resulting in doped Cspb1–xMxBr3NCs, with preservation of the original NC shape.
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High-performance direct conversion X-ray detectors based on sintered hybrid lead triiodide perovskite wafers
Shreetu Shrestha,Rene Fischer,Gebhard J. Matt,Patrick Feldner,Thilo Michel,Andres Osvet,Ievgen Levchuk,Benoit Merle,Saeedeh Golkar,Haiwei Chen,Sandro Francesco Tedde,Oliver Schmidt,Rainer Hock,Manfred Rührig,Mathias Göken,Wolfgang Heiss,Gisela Anton,Christoph J. Brabec +17 more
TL;DR: Methyl ammonium lead triiodide perovskite wafers for application in direct conversion X-ray detectors are fabricated by a room-temperature sintering process.
Journal ArticleDOI
Strain engineering and epitaxial stabilization of halide perovskites.
Yimu Chen,Yusheng Lei,Yuheng Li,Yugang Yu,Jinze Cai,Ming-Hui Chiu,Rahul Rao,Yue Gu,Chunfeng Wang,Woojin Choi,Hongjie Hu,Chonghe Wang,Yang Li,Jiawei Song,Jingxin Zhang,Baiyan Qi,Muyang Lin,Zhuorui Zhang,Ahmad E. Islam,Benji Maruyama,Shadi A. Dayeh,Lain-Jong Li,Lain-Jong Li,Kesong Yang,Yu-Hwa Lo,Sheng Xu +25 more
TL;DR: Strain engineering of α-formamidinium lead iodide (α-FAPbI 3) is investigated using both experimental techniques and theoretical calculations, and it is demonstrated that a compressive strain effectively changes the crystal structure, reduces the bandgap and increases the hole mobility of α -FAPBI 3.
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Michael M. Lee,Joël Teuscher,Tsutomu Miyasaka,Takurou N. Murakami,Takurou N. Murakami,Henry J. Snaith +5 more
TL;DR: A low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight is reported.