High-Performing Quasi-2D Perovskite Photodetectors with Efficient Charge Transport Network Built from Vertically Orientated and Evenly Distributed 3D-Like Phases

Li, B., Huang, X., Wu, X., Zuo, Q., Cao, Y., Zhu, Q., Li, Y., Xu, Y., Zheng, G., Chen, D., Zhu, X.-H., Huang, F., Zhen, H., Hou, L., Qing, J., Cai, W., Adv. Funct. Mater. 2023, 2300216. https://doi.org/10.1002/adfm.202300216

Q-2D perovskites are promising photodetector materials, but their charge transport is limited by their hybrid low-dimensional structure. Researchers used a double-hole transport layer (PTAA & PEDOT:PSS) to create evenly-distributed 3D-like phases with vertical orientation, improving charge transport and reducing recombination.

This Ruddlesden-Popper perovskite photodetector achieved a high responsivity, specific detectivity, linear dynamic range, and fast rise/fall times. The study reveals the relationship between Q-2D perovskites' phase structure and performance, guiding future photodetector designs.

Transient photovoltage decay (TPV) measurements were performed with PAIOS instrumentation.