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Communication Dans Un Congrès Année : 2016

Using Low Temperature Photoluminescence Spectroscopy to Investigate CH3NH3PbI3 Hybrid Perovskite Degradation

Résumé

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. Defects and grain boundaries are then thought to play an important role in the degradation mechanism.
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Dates et versions

hal-01420969 , version 1 (28-12-2016)

Identifiants

  • HAL Id : hal-01420969 , version 1

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Khaoula Jemli, Hiba Diab, Ferdinand Lédée, Gaëlle Trippé-Allard, Damien Garrot, et al.. Using Low Temperature Photoluminescence Spectroscopy to Investigate CH3NH3PbI3 Hybrid Perovskite Degradation. 2nd International Conference on Perovskite Solar Cells and Optoelectronics, Sep 2016, Genova, Italy. ⟨hal-01420969⟩
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