Chiral 2D/Quasi-2D Perovskite Heterojunction Nanowire Arrays for High-Performance Full-Stokes Polarization Detection

摘要

The realization of Stokes photodetectors accelerates the development ofvarious modern optoelectronic applications. Chiral 2D perovskites withintrinsic chiral optical activity and superior carrier mobility are promising fornext-generation full-Stokes polarization detection. So far, most of the chiral 2Dmetal-halide perovskite-based photodetectors suffer from limiteddiscrimination of circularly polarized light due to the high excitonrecombination rate in single-phase perovskite, impeding the accuratemeasurement for Stokes parameters. Here, an on-chip Stokes photodetectorbased on chiral 2D/quasi-2D perovskite lateral heterojunction nanowire (NW)arrays with high polarization selectivity and photoresponsiveness is reported.The highly-aligned heterojunction NW arrays not only build up a built-inelectric field for enhanced chiral discrimination, but also possess intrinsicanisotropy that enables outstanding linear polarization response. On thisbasis, the device exhibits reliable ability for polarization detection with a highanisotropy factor of 0.38, an outstanding polarized ratio of 1.5, and anexcellent responsivity of 22.14 A W~（?1）. These results will provide usefulenlightenment for direct full-Stokes polarization detection in optoelectronicintegrated circuits.