Thermal unequilibrium of strained black CsPbI 3 thin films
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- 16 August 2019
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 365 (6454), 679-684
- https://doi.org/10.1126/science.aax3878
Abstract
The high-temperature, all-inorganic CsPbI3 perovskite black phase is metastable relative to its yellow, nonperovskite phase at room temperature. Because only the black phase is optically active, this represents an impediment for the use of CsPbI3 in optoelectronic devices. We report the use of substrate clamping and biaxial strain to render black-phase CsPbI3 thin films stable at room temperature. We used synchrotron-based, grazing incidence, wide-angle x-ray scattering to track the introduction of crystal distortions and strain-driven texture formation within black CsPbI3 thin films when they were cooled after annealing at 330°C. The thermal stability of black CsPbI3 thin films is vastly improved by the strained interface, a response verified by ab initio thermodynamic modeling.This publication has 41 references indexed in Scilit:
- Scaling of next generation solution processed organic and perovskite solar cellsNature Communications, 2018
- Stability in Perovskite Photovoltaics: A Paradigm for Newfangled TechnologiesACS Energy Letters, 2018
- Methodologies toward Highly Efficient Perovskite Solar CellsSmall, 2018
- Instilling defect tolerance in new compoundsNature Materials, 2017
- Make perovskite solar cells stableNature, 2017
- Intrinsic Thermal Instability of Methylammonium Lead Trihalide PerovskiteAdvanced Energy Materials, 2015
- Transformation of the Excited State and Photovoltaic Efficiency of CH3NH3PbI3 Perovskite upon Controlled Exposure to Humidified AirJournal of the American Chemical Society, 2015
- The emergence of perovskite solar cellsNature Photonics, 2014
- Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cellsEnergy & Environmental Science, 2014
- Electron-Hole Diffusion Lengths Exceeding 1 Micrometer in an Organometal Trihalide Perovskite AbsorberScience, 2013