Nanochannel-confined growth of crystallographically orientated perovskite nanowire arrays for polarization-sensitive photodetector application

Highly ordered perovskite nanowire (PNW) arrays are important building blocks for potential application in integrated optoelectronic devices due to their unique properties. Herein, a recordable digital versatile disk-assisted nanochannel-confined growth (NCG) strategy was developed for large-scale growth of different kinds of PNW arrays with preferentially crystallographic orientation on various substrates. Photodetector constructed from MAPbI3 NW arrays exhibits prominent photoresponse properties with a responsivity of 20.56 A W−1 and specific detectivity of 4.73 × 1012 Jones, respectively. What is more, the photodetector can function as a polarization-sensitive photodetector due to the crystallographic orientation of the one-dimensional PNW arrays, with a polarization ratio of 2.2. The proposed NCG strategy provides a cost-efficient and effective method for the fabrication of high-quality PNW arrays with potential applications in future integrated devices and systems.