Achieving High Responsivity and Detectivity in a Quantum-Dot-in-Perovskite Photodetector
Zhirong Liu, Zhiguo Zhang, Xuning Zhang, Xiongjie Li, Zhiyong Liu, Guanglan Liao, Yan Shen, Mingkui Wang
Abstract
This work reports on quantum dots (QDs) in perovskite photodetectors showing high optoelectronic performance via quantum-dot-assisted charge transmission. The self-powered broad-band photodetector constructed with SnS QDs in FAPb 0.5 Sn 0.5 I 3 perovskite can capture incoming optical signals directly at zero bias. The QDs-in-perovskite photodetector exhibits a high sensitivity in the wavelength range from 300 to 1000 nm. Its responsivity at 850 nm reaches 521.7 mA W –1, and a high specific detectivity of 2.57 × 10 12 jones can be achieved, which is well beyond the level of previous self-powered broad-band photodetectors. The capability of quantum-dot-in-perovskite photodetectors as data receivers has been further demonstrated in a visible-light communication application.