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- W3207350412 abstract "Abstract Understanding and manipulating the photoluminescence (PL) of all‐inorganic perovskites is significant in applications toward light‐emitting diodes. Doping has proved to be a very promising approach for tuning the luminescence properties of perovskites. Herein, rare earth (Er and Yb) doped 3D all‐inorganic perovskite flakes (CsPb(Cl/Br) 3 ) are synthesized. At room temperature, they possess a narrow emission peak at 506 nm with 10 nm linewidth and a quite broad peak at 700 nm with 170 nm linewidth, which are from band‐edge PL of α‐CsPb(Cl/Br) 3 and self‐trapped excitons of δ‐CsPb(Cl/Br) 3 , respectively. When exposing the flakes under a light‐soaking, the samples present a color tuning capability spanning from red to green by extension of the soaking time, and the emission properties can recover by removing the light‐soaking and undergoing a certain recovery time. Time‐resolved photoluminescence indicates a photoinduced reduction of defects density in the doped perovskite flakes. Based on further density functional theory calculations, a photoinduced O 2 ‐diffused defect‐passivation mechanism is proposed. The discovery is expected to promote the optical tuning capability of the all‐inorganic perovskites and expand their potential application in optoelectronics devices." @default.
- W3207350412 created "2021-10-25" @default.
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- W3207350412 date "2021-10-07" @default.
- W3207350412 modified "2023-10-18" @default.
- W3207350412 title "Light‐Soaking Induced Optical Tuning in Rare Earth‐Doped All‐Inorganic Perovskite" @default.
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- W3207350412 doi "https://doi.org/10.1002/adfm.202107086" @default.
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