Solution-Processed Tin-Based Perovskite for Near-Infrared Lasing.

Xing, Guichuan; Kumar, Mulmudi Hemant; Chong, Wee Kiang; Liu, Xinfeng; Cai, Yao; Ding, Hong; Asta, Mark; Grätzel, Michael et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

The family of solution-processed tin-based perovskites is demonstrated as a new and superior near-infrared gain medium. Due to the large electron-hole bimolecular recombination associated with tin and the reduced trap density with SnF<sub>2</sub> treatment, these lead-free "green" perovskites yield stable coherent light emission extending to ≈1 μm at strikingly low thresholds.