Results 41 to 50 of about 29,827 (186)

Stability Trend of Tilted Perovskites

, 2018
Halide perovskites, with prototype cubic phase ABX3, undergo various phase transitions accompanied by rigid rotations of corner-sharing BX6 octahedra.
Shojaei, Fazel, Yin, Wan-Jian
core   +2 more sources

Light-induced picosecond rotational disordering of the inorganic sublattice in hybrid perovskites. [PDF]

, 2017
Femtosecond resolution electron scattering techniques are applied to resolve the first atomic-scale steps following absorption of a photon in the prototypical hybrid perovskite methylammonium lead iodide.
Coffee, Ryan, Egger, David A, Fry, Alan, Guzelturk, Burak, Hu, Te, Karunadasa, Hemamala I, Kronik, Leeor, Li, Renkai, Lindenberg, Aaron M, Liu, Shi, Makasyuk, Igor, Miyata, Kiyoshi, Rappe, Andrew M, Robinson, Joseph S, Shen, Xiaozhe, Smith, Matthew D, Tan, Liang Z, Trinh, M Tuan, Wang, Xijie, Wu, Xiaoxi, Zheng, Qiang, Zhu, Xiaoyang   +21 more
core   +2 more sources

Inhibition of Phase Segregation in Cesium Lead Mixed-Halide Perovskites by B-Site Doping

iScience, 2020
Summary: The emergence of all-inorganic halide perovskites has shown great potential in photovoltaic and optoelectronic devices. However, the photo-induced phase segregation in lead mixed-halide perovskites has severely limited their application. Herein,
Daocheng Hong, Peiyang Zhao, Yu Du, Cheng Zhao, Yuren Xia, Zhihong Wei, Zhong Jin, Yuxi Tian   +7 more
doaj   +1 more source

Minimizing energy loss in two-dimensional tin halide perovskite solar cells—A perspective

APL Materials, 2021
Tin halide perovskites have desirable photoelectric properties but are very fragile to an oxidizing atmosphere. This represents a great challenge for their full practical potential in photovoltaic technologies.
Tao Zhang, Qiang Sun, Xiaoli Zhang, Yan Shen, Mingkui Wang   +4 more
doaj   +1 more source

Low energy paths for octahedral tilting in inorganic halide perovskites

, 2018
Instabilities relating to cooperative octahedral tilting is common in materials with perovskite structures, and in particular in the sub class of halide perovskites.
Klarbring, Johan
core   +1 more source

Breakdown of the static picture of defect energetics in halide perovskites: the case of the Br vacancy in CsPbBr3

, 2019
We consider the Br vacancy in CsPbBr3 as a prototype for the impact of structural dynamics on defect energetics in halide perovskites (HaPs). Using first-principles molecular dynamics based on density functional theory, we find that the static picture of
Cohen, Ayala V., Egger, David A., Kronik, Leeor, Rappe, Andrew M.   +3 more
core   +1 more source

The study of new double perovskites K2AgAsX6 (X = Cl, Br) for energy-based applications

Journal of Taibah University for Science, 2023
Halide double perovskites are the best alternative to Pb-halide perovskites. These materials play an important role in renewable energy generation. Therefore, we explore the physical properties of K2AgAsX6 (X = Cl, Br) double halide perovskites using ...
Malak Azmat Ali, Razan A. Alshgari, Aboud Ahmed Awadh Bahajjaj, Mika Sillanpää   +3 more
doaj   +1 more source

Identification of Free and Bound Exciton States and Their Phase-Dependent Trapping Behavior in Lead Halide Perovskites

, 2017
In this work we probe the sub-gap energy states within polycrystalline and single crystal lead halide perovskites to better understand their intrinsic photophysics behaviors.
Jasieniak, Jacek J., Li, Dongmei, Li, Yiming, Li, Yusheng, Luo, Yanhong, Meng, Qingbo, Shi, Jiangjian, Wu, Huijue, Zhang, Huiyin   +8 more
core   +1 more source

Elucidation of the suppression of photoinduced segregation in 2D mixed halide, A2PbI2Br2: Critical role of A2PbBr4 photostability

iScience
Summary: 2D lead halide perovskites are used to improve device operational stability due to increased environmental stability and reduced ion migration compared to 3D perovskites.
Zhilin Ren, Zhengtian Yuan, Juraj Ovčar, Tik Lun Leung, Yanling He, Anita W.Y. Ho-Baillie, Ivor Lončarić, Jasminka Popović, Aleksandra B. Djurišić   +8 more
doaj   +1 more source

High Open-Circuit Voltages in Lead-Halide Perovskite Solar Cells - Experiment, Theory and Open Questions

, 2019
One of the most significant features of lead-halide perovskites are their ability to have comparably slow recombination despite the fact that these materials are mostly processed from solution at room temperature.
Kirchartz, Thomas
core   +1 more source