Robbins, Lotanna Ezeonu, Yichen Ma, Nicholas Sparta, Xiaoqing Kong, Stefan Strauf, Simon G. Ion Migration Accelerated Reaction between Oxygen and Metal Halide Perovskites in Light and Its Suppression by Cesium Incorporation. Dongxu Lin, Tingting Shi, Haipeng Xie, Fang Wan, Xiaoxue Ren, Kai Liu, Yuan Zhao, Lili Ke, Yun Lin, Yongli Gao, Xin Xu, Weiguang Xie, Pengyi Liu, Yongbo Yuan.Double-layer synergistic optimization by functional black phosphorus quantum dots for high-efficiency and stable planar perovskite solar cells. Yuhong Zhang, Lin Xu, Yanjie Wu, Qingqing Zhou, Zhichong Shi, Xinmeng Zhuang, Bin Liu, Biao Dong, Xue Bai, Wen Xu, Donglei Zhou, Hongwei Song.Growth and Degradation Kinetics of Organic–Inorganic Hybrid Perovskite Films Determined by In Situ Grazing‐Incidence X‐Ray Scattering Techniques. Jian Wang, Weijia Wang, Yonghua Chen, Lin Song, Wei Huang.Sulfur Treatment Passivates Bulk Defects in Sb Damle, Sebastian Siol, Wei Cui, Laxman Gouda, Jihye Suh, Yaakov R. Rajiv Ramanujam Prabhakar, Thomas Moehl, Dennis Friedrich, Marinus Kunst, Sudhanshu Shukla, Damilola Adeleye, Vinayaka H.Yongbo Yuan, Qing Zhao, Yuchuan Shao, Jixuan Zhou, Chao Luo, Hu Wang.In-situ photoisomerization of azobenzene to inhibit ion-migration for stable high-efficiency perovskite solar cells. Xuejiao Zuo, Yiyang He, Hongyu Ji, Yong Li, Xiuying Yang, Binxun Yu, Tao Wang, Zhike Liu, Wenliang Huang, Jing Gou, Ningyi Yuan, Jianning Ding, Shengzhong Frank Liu.Journal of Materials Chemistry A 2022, 10 The effect of caesium alloying on the ultrafast structural dynamics of hybrid organic–inorganic halide perovskites. Inhibited Degradation of Organic–Inorganic Perovskite-Based Quantum Dot Films via Rapid Annealing Temperatures. Pao-Hsun Huang, Pin-Jia Lai, Wen-Ray Chen, Chuan-Hsi Liu, Po-Wen Sze, Shui-Yang Lien, Chien-Jung Huang.Series and Parallel Module Design for Large-Area Perovskite Solar Cells. Lili Gao, Lin Chen, Shiyu Huang, Xiaolei Li, Guanjun Yang.Radiative Recombination Changes under Light-Soaking in CsPbBr3 Films on TiO2 and Insulating Glass Contacts: Interface versus Bulk Effects. Jiangang Hu, Laxman Gouda, Adi Kama, Shay Tirosh, Ronen Gottesman.The Journal of Physical Chemistry C 2020, 124 In Situ Spectroscopic Ellipsometry for Thermochromic CsPbI3 Phase Evolution Portfolio. Meng Yuan, Long Yuan, Zhiyan Hu, Zhaoliang Yu, Haibo Li, Eva M.ACS Applied Materials & Interfaces 2021, 13 Carrier Diffusion and Recombination Anisotropy in the MAPbI3 Single Crystal. Jie Zhang, Kaiyu Wang, Qing Yao, Ye Yuan, Jianxu Ding, Weiwei Zhang, Haiqing Sun, Chenyu Shang, Changqian Li, Tianliang Zhou, Shuping Pang.Identification of Enantiomers Using Low-Frequency Raman Spectroscopy. Vinayaka Harshothama Damle, Hagit Aviv, Yaakov R.The Journal of Physical Chemistry Letters 2022, 13 Anion Doping Delays Nonradiative Electron–Hole Recombination in Cs-Based All-Inorganic Perovskites: Time Domain ab Initio Analysis. This article is cited by 19 publications. This rigidizing effect can explain the importance of incorporating and alloying heavy elements into OHPs to bring both chemical stability and photostability. In addition to this, Cs incorporation rigidizes the perovskite film and sharpens all low-frequency vibrational peaks. The thermally induced structural fluctuations in pure MAPbI 3 films are damped upon Cs incorporation, thus bringing long-range stabilized order to the perovskite structure and enabling for the first time observation of low-frequency Raman scattering at room temperature for OHPs. The structural transformations observed in absorption spectra and XRD are confirmed by low-frequency Raman spectroscopy. Incorporating 59% or more Cs ions yields the yellow phase of CsPbI 3, due to alloying of Cs with the MAPbI 3 matrix. At a concentration of 20% Cs ions, we observe the existence of a stable α-CsPbI 3 phase. Incorporation of Cs into MAPbI 3 leads to formation of both α-CsPbI 3 and ∂-CsPbI 3 phases, black and yellow, respectively, as indicated by the evolution of the optical band edge and X-ray diffraction (XRD) spectrum. Here we have incorporated Cs ions into methylammonium lead iodide (MAPbI 3) films and studied the thin film structural and optical properties. Probing this intrinsic instability is one of the major milestones and challenging tasks toward enhancing the lifespan of the material. The structural instability of organometal halide perovskites (OHP) is one of the major issues concerning commercialization of perovskite solar cells.
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