Self-powered, all-solution processed, trilayer heterojunction perovskite-based photodetectors

Nanotechnology
Muhammad Imran SaleemBingsuo Zou

Abstract

Heterostructures composed of nano-/micro-junctions, combining the excellent photon harvesting properties of nano-system and ultrafast carrier transfer of micro-system, have shown promising role in high-performance photodetectors. Here, in this paper a highly-sensitive trilayer self-powered perovskite-based photodetector ITO/ZnO(70nm)/CdS(150nm)/CsPbBr3(200nm)/Au, in which the CdS nanorods (NRs) layer is sandwiched between ZnO/CsPbBr3 interface to reduce the interfacial charge carriers' recombination and the charge transport resistance, is presented. Due to the strong built-in potential and the internal driving electric-field, an ultra-high On/Off current ratio of 106 with a responsivity of 86 mA/W and a specific detectivity of 6.2×1011 Jones was obtained at zero bias under 85 µW/cm2 405 nm illumination, and its rise/decay time at zero bias is 0.3/0.25 s. Therefore, the enhanced device performance strongly suggest the great potential of such a kind of trilayer heterojunction devices for high-performance perovskite photodetectors.

References

Oct 7, 2014·Nature Nanotechnology·F H L KoppensM Polini
Jan 20, 2015·ACS Nano·Hong QiaoQiaoliang Bao
Jan 27, 2016·ACS Applied Materials & Interfaces·Insung Hwang, Kijung Yong
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Citations

Jun 18, 2021·ACS Applied Materials & Interfaces·Hong-Rae KimJae-Chul Pyun

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