Materials based on halide perovskites have recently revolutionized the field of photovoltaics and are currently explored for many other optoelectronic applications with highly promizing results along with low-cost processes and earth abundant elements. Clearly, these solids constitute a new family of semiconductors that deserve deeper analysis from a fundamental point of view as many microscopic mecanisms underlying their exciting properties are still poorly understood. Nature materials asked four teams of researchers to share their views on major open questions currently debated in the perovskite community. Claudine Katan and Jacky Even members of CNRS laboratories entitled ISCR and Institut FOTON, located in the city of Rennes, along with Aditya Mohite from the LANL in the United States, discuss the possible impact of various entropy contributions - namely stochastic structural fluctuations, anharmonicity and lattice softness - on the optoelectronic properties of halide perovskite materials and devices.
 Jacky EVEN, Institut FOTON jacky.even insa-rennes.fr +33 2 23 23 82 95 |
 Claudine KATAN, ISCR claudine.katan univ-rennes1.fr +33 2 23 23 56 82 |
LANL (Los Alamos, USA)
Entropy in halide perovskites, C. Katan, A.D. Mohite and J. Even. Nat. Mater. 17 377–379 (2018), DOI : 10.1038/s41563-018-0070-0
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