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Article Dans Une Revue physica status solidi (b) Année : 2019

Photoluminescence Tuning Through Irradiation Defects in CH$_3$NH$_3$PbI$_3$ Perovskites

Résumé

Defect engineering is applied to hybrid (CH3NH3)PbI3 organic-inorganic perovskites. These materials have become one of the most promising low-cost alternatives to traditional semiconductors in the field of photovoltaics and light emitting devices. We use here Helium ion irradiation at low energy as a tool for the controlled introduction of point defects in both single crystals and polycrystalline thin films. The irradiation defects modify the opto-electronic properties as probed using photoluminescence spectroscopy from 10K to room-temperature. 2 Contrary to usual semiconductors, we observe a very good resilience of the PL properties with irradiation, even associated to an enhancement of the optical emission at low temperature. We discuss these results in relation with the tetragonal to orthorhombic low-temperature phase transition below T=160 K. A comparison between spectra from single crystals and polycrystalline films, both with and without irradiation defects, allow a better understanding of the light emission mechanisms in both kinds of samples. We thereby evidence radiation hardness of these materials and the specificity of defects and their impact over light emission properties.
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Dates et versions

hal-03373144 , version 1 (11-10-2021)

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Olivier Plantevin, Stéphanie Valère, Driffa Guerfa, Ferdinand Lédée, Gaëlle Trippé-Allard, et al.. Photoluminescence Tuning Through Irradiation Defects in CH$_3$NH$_3$PbI$_3$ Perovskites. physica status solidi (b), 2019, 256 (10), pp.1900199. ⟨10.1002/pssb.201900199⟩. ⟨hal-03373144⟩
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