Metal halide perovskite photodetectors: Material features and device engineering

Wang Ye^{1, 2}, Gao Meng-Lei^{1, 2}, Wu Jin-Liang^{1, 2}, Zhang Xing-Wang^{1, 2, †}

(a) Schematic of the working principles of CCN photodiodes. (b) Working mechanism and performance of the red narrowband CCN photodiodes. (c) EQEs at −0.5 V of the red narrowband photodiodes fabricated with different ratios of PbI₂ and PbBr₂.^[101] (d) Schematic showing a narrowband PD with a thick active layer and integrated perovskite layer. (e) Device structures of narrowband PDs with an integrated perovskite layer (left) and thick active layer (right). (f) EQE spectra of devices with a thick active layer and devices with an integrated perovskite-1 filter layer with different mixed-halides ratios.^[199]