Thermal unequilibrium of strained black CsPbI  3  thin films

Steele, Julian A.; Jin, Handong; Dovgaliuk, Iurii; Berger, Robert; Braeckevelt, Tom; Yuan, Haifeng; Martín, Cristina; Solano, Eduardo; Lejaeghere, Kurt; Rogge, Sven M. J.; Notebaert, Charlotte; Vandezande, Wouter; Janssen, Kris P. F.; Goderis, Bart; Debroye, Elke; Wang, Ya‐Kun; Dong, Yitong; Ma, Dongxin; Saidaminov, Makhsud I.; Tan, Hairen; Lu, Zheng‐Hong; Dyadkin, Vadim; Chernyshov, Dmitry; Speybroeck, Véronique Van; Sargent, Edward H.; Hofkens, Johan; Roeffaers, Maarten B. J.

doi:10.1126/science.aax3878

articleScienceJul 25, 2019GREEN OA

Thermal unequilibrium of strained black CsPbI 3 thin films

JAJulian A. Steele HJHandong Jin IDIurii Dovgaliuk RBRobert Berger TBTom Braeckevelt

KU Leuven · European Synchrotron Radiation Facility · +6 more institutions

PubMed

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Abstract

Strain-stabilized perovskites The perovskite materials used for solar cells and light-emitting diodes (which are black in color) are generally less stable at room temperature than the electronically inactive nonperovskite phases (which are yellow in color). Steele et al. show that for CsPbI 3 , strain induced in a thin film after annealing the material to 330°C and then rapidly cooling it to room temperature kinetically trapped the black phase. Grazing-incidence wide-angle x-ray scattering revealed the crystal distortions and texture formation created by interfacial strain. Science , this issue p. 679

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Keywords

Materials science
Annealing (glass)
Thin film
Perovskite (structure)
Diode
Thermal
Scattering
Optics

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