Solution-possessed vertical photodetectors based on composition-dependent cesium lead halide (CsPbX3, X = Cl, Br, and I) perovskite quantum dots

Yu Yu; Yating Zhang; Lufan Jin; Zhiliang Chen; Yifan Li; Qingyan Li; Mingxuan Cao; Yongli Che; Jianquan Yao

doi:10.1117/12.2505580

27 February 2019 Solution-possessed vertical photodetectors based on composition-dependent cesium lead halide (CsPbX₃, X = Cl, Br, and I) perovskite quantum dots

Yu Yu, Yating Zhang, Lufan Jin, Zhiliang Chen, Yifan Li, Qingyan Li, Mingxuan Cao, Yongli Che, Jianquan Yao

Author Affiliations +

Proceedings Volume 10914, Optical Components and Materials XVI; 1091419 (2019) https://doi.org/10.1117/12.2505580
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

All-inorganic cesium lead halide perovskite quantum dots (PQDs) have been applied in optoelectronic fields owing to their unique properties including high carrier mobility, air stabilities and highly efficient photoluminescence. To overcome existing limitations in photodetection for light with particular wavelength and cost of state-of-the-art systems, new-style device structures and composite material systems are needed with low-cost fabrication and high performances. Here we synthesized the CsPbX₃ (X = Cl, Br, and I) PQDs by changing the composition at room temperature and fabricated vertical field effect phototransistors (VFEpTs) with Au/Ag nanowires as the transparent source electrode and composition-dependent CsPbX₃ (X = Cl, Br, and I) PQDs as active materials. It dominates to obtain photoresponse for specific wavelength in the visible spectrum and high performances. Particularly, VFEpTs based on CsPbCl_1.5Br_1.5 CsPbBr₃, and CsPbBr_1.5I_1.5 PQDs are sensitive for blue, green, and red lights, respectively. It is worth mentioning that the device exhibits quantitative characterization for the contents of white light. Furthermore, CsPbX₃ VFEpTs exhibit high performances including a short photoresponse time (less than 6 ms) and a high photoresponsivity (<9 × 10⁴ AW⁻¹). Allinorganic PQDs open up opportunities to integrate inorganic semiconductors, into high performances and flexible devices by using low cost, room temperature, large area, and solution based methods.

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Yu Yu, Yating Zhang, Lufan Jin, Zhiliang Chen, Yifan Li, Qingyan Li, Mingxuan Cao, Yongli Che, and Jianquan Yao "Solution-possessed vertical photodetectors based on composition-dependent cesium lead halide (CsPbX₃, X = Cl, Br, and I) perovskite quantum dots", Proc. SPIE 10914, Optical Components and Materials XVI, 1091419 (27 February 2019); https://doi.org/10.1117/12.2505580

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