Crystal engineering based on defect passivation with metal ions doped into halide perovskites is of considerable interest for tailoring the photoelectric properties of perovskites. Herein, a simple and robust approach for doping metal ions into a thin all-inorganic CsPbBr3 perovskite film by employing metal–organic framework nanoparticles is presented. Zeolitic imidazolate framework-8 nanoparticles, which can adsorb water, are dispersed and embedded in a thin perovskite film. The particles self-decompose at a certain humidity, releasing Zn2+ ions into nearby perovskite crystals. The Zn2+ ions efficiently passivate the undercoordinated defect sites of the defective perovskite crystals, resulting in environmentally stable and enhanced photoluminescence of the perovskite with a quantum yield of ≈14%, more than 24 times greater than that without nanoparticles. Further, a thin Zn-doped CsPbBr3 film is employed to fabricate arrays of ultraviolet photodetectors, and ≈90% of the initial photocurrent is maintained over 15 d in RH 60%, facilitating the development of a dual-mode image sensor using which programmed images are visualized based on both photocurrent and photoluminescence.
|Journal||Advanced Functional Materials|
|Publication status||Published - 2022 May 2|
Bibliographical noteFunding Information:
This research was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2018M3D1A1058536). This research was also supported by a grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MEST) (No. 2020R1A2B5B03002697). This work was partially supported by the Basic Science Research Program (2021M3H4A1A03047331 and 2Z05900–19‐P096) through the National Research Foundation of Korea and the Korea Institute of Science and Technology (KIST), Republic of Korea. This research was also supported by the Yonsei Signature Research Cluster Program of 2021 (2021‐22‐0002).
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics