Written by Zhang Qing, Peking University

Perovskite (Perovskite) is named to commemorate the contribution of Lev Perovski (Perovski) in the mineralogy community. It represents the first discovered calcium titanate (CaTiO3) with the same ABX3 chemical formula and crystal structure A class of compounds. The artificial synthesis of perovskite began in 1893. In 2009, Professor T. Miyasaka of Toyin Yokohama University in Japan used methylamine lead bromide and methylamine lead iodide as light-absorbing materials to obtain a solar cell with a photoelectric conversion efficiency of 3.8%, and then calcium The excellent photovoltaic properties of titanium ore have aroused widespread concern in the academic community. At present, the photoelectric conversion efficiency of single-junction solar cells has exceeded 25%. As a kind of direct band gap semiconductor material, perovskite has many advantages such as simple and low-cost synthesis, high optical absorption/gain coefficient/fluorescence quantum yield, high defect tolerance, adjustable emission wavelength, and large exciton binding energy.It has become a star material in the fields of photonics and photoelectric information functional devices. In view of the wide application prospects of perovskite materials in the basic physics of photonics (as shown in the figure below) and the research of emerging devices, Photonics Research, an important journal in the field of photonics, launched the topic of Perovskite Photonics in due course. It was developed by Prof. Qing Zhang (Peking University) and Prof. Contributions by Carole Diederichs (Sorbonne University) and Prof. Qihua Xiong (Nanyang Technological University). The topic has received positive responses from many leading research teams in the field of perovskite photonics. The included articles cover nonlinear optical effects, photon-exciton strong coupling, optoelectronic functional devices, etc., reflecting the latest developments and breakthroughs in the field Results.

Perovskite Photonics Special On the Cover

[Yang Zhao, Fei Ma, Feng Gao, Zhigang Yin, Xingwang Zhang, Jingbi You. Research progress in large-area perovskite solar cells[J]. Photonics Research, 2020, 8(7): 070000A1.]

This topic has published 9 high-quality papers by experts and scholars from China, Australia, France and the United Kingdom: Tom Wu, University of New South Wales, Australia, studied the mechanism and inhibition of mixed halogen perovskite phase separation; Hai Son, University of Lyon, France Nguyen et al. studied the photon-exciton-exciton polarization excimer strong coupling and the formation of bound states in the quasi-continuum domain in the metal/perovskite metasurface structure; Ifor DW Samuel, University of St Andrews, UK, demonstrated the perovskite for the first time The integrated application strategy of solar cells, photoelectric detectors and information transmission in mining industry; Maria Chamarro of Sorbonne University in France and others studied magneto-optical spectroscopy. You Jingbi’s team from the Institute of Semiconductors of the Chinese Academy of Sciences reviewed the progress in the preparation of large-area perovskite solar cells; Liu Xinfeng’s team from the National Nanoscience Center reviewed the phenomenon of two-dimensional perovskite microcavity lasers and photon-exciton strong coupling; Southern University of Science and Technology Chen Rui’s team reported the non-linear effects caused by the coexistence of two-photon absorption and saturated absorption of mixed cation perovskites; Leng Yuxin’s team from Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences realized the Fabry-Perot and whispering gallery dual modes at room temperature Down-conversion laser; The Pan Hui team of the University of Macau reported that toluene treatment improved the film quality and battery performance of perovskite on the hole transport layer. It is hoped that through the sharing of this topic, the cutting-edge progress of perovskite photonics will be shown, and more scholars will be attracted to participate in the scientific and applied research of perovskite photonics in basic physics and emerging devices.

Information source: China Laser

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