Air-processed, ultraresponsive NIR photodetectors using 2D perovskite hybrids.

ABSTRACT: Halide perovskites have shown tremendous potential as active materials in various optoelectronic devices, including solar cells, light-emitting diodes and photodetectors. However, their relatively large bandgaps - typically limited to ∼1.40 eV (∼885 nm) - constrain their use as near-infrared (NIR) photodetectors. Here, we present a novel two-dimensional (2D) hybrid perovskite (PDA)₂PbI₄ (PDA = 6-phenyl-3,5-hexadiynylammonium), which upon thermopolymerization forms (poly-PDA) PbI₄ (polyPDA = polymerized PDA). This material can be incorporated into NIR photodetectors exhibiting record-high responsivities of up to 10⁷ A W^-1 and external quantum efficiencies of up to (128.0 ± 3.6)% at 980 nm under a 4 V bias. Notably, the devices can be fa

SUBMITTER: Zugasti-Fernandez D 

PROVIDER: S-EPMC12315253 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature