期刊
ADVANCED OPTICAL MATERIALS
卷 6, 期 23, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201800979
关键词
antisolvent; PbS quantum dots; perovskites; photodetectors; visible-near-infrared region
资金
- National Key R&D Program of China [2018YFB0407100-02]
- Foundation for Innovation Research Groups of the National Natural Science Foundation of China (NSFC) [61421002]
- Foundation of NSFC [61675041, 51703019]
Organometal lead-halide perovskites demonstrate excellent photovoltaic performance in the visible (Vis) region. However, their lack of response in the near-infrared (NIR) region limits their applications in broadband photodetectors. Herein, an efficient Vis-NIR perovskite photodetector (PePD) created by doping PbS quantum dots (QDs) in perovskite precursors via an antisolvent additive solution process is reported. By changing the volume of the antisolvent additive, perovskite hybrid films of MAPbI(3): PbS QDs with good crystallinity and uniform grain size are created. The resultant Vis-NIR PePD exhibits a specific detectivity of 10(12) and 10(11) Jones in the visible and NIR regions, respectively. These results suggest that the antisolvent additive solution process can disperse PbS QDs between perovskite grain boundaries and control the perovskite crystallinity and morphology, providing a simple method to broaden the spectral response range of PePDs.
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