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- Title
Using Low Temperature Photoluminescence Spectroscopy to Investigate CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Hybrid Perovskite Degradation.
- Authors
Jemli, Khaoula; Diab, Hiba; Lédée, Ferdinand; Trippé-Allard, Gaelle; Garrot, Damien; Geffroy, Bernard; Lauret, Jean-Sébastien; Audebert, Pierre; Deleporte, Emmanuelle
- Abstract
Investigating the stability and evaluating the quality of the CH3NH3PbI3 perovskite structures is quite critical both to the design and fabrication of high-performance perovskite devices and to fundamental studies of the photophysics of the excitons. In particular, it is known that, under ambient conditions, CH3NH3PbI3 degrades producing some PbI2. We show here that low temperature Photoluminescence (PL) spectroscopy is a powerful tool to detect PbI2 traces in hybrid perovskite layers and single crystals. Because PL spectroscopy is a signal detection method on a black background, small PbI2 traces can be detected, when other methods currently used at room temperature fail. Our study highlights the extremely high stability of the single crystals compared to the thin layers and defects and grain boundaries are thought to play an important role in the degradation mechanism.
- Publication
Molecules, 2016, Vol 21, Issue 7, p885
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules21070885