Semitransparent, Flexible, and Self‐Powered Photodetectors Based on Ferroelectricity‐Assisted Perovskite Nanowire Arrays

Abstract

Transparent and flexible photodetectors hold great promise in next-generation portable and wearable optoelectronic devices. However, most of the previously reported devices need an external energy power source to drive its operation or require complex fabrication processes. Herein, designed is a semitransparent, flexible, and self-powered photodetector based on the integrated ferroelectric poly(vinylidene-fluoride-trifluoroethylene) (P(VDF-TrFE)) and perovskite nanowire arrays on the flexible polyethylene naphthalate substrate via a facile imprinting method. Through optimizing the treatment conditions, including polarization voltage, polarization time, and the concentration of P(VDF-TrFE), the resulting device exhibits remarkable detectivity (7.3 × 10 12 Jones), fast response time (88/154 µs) at zero bias, as well as outstanding mechanical stability. The excellent performance is attributed to the efficient charge separation and transport originating from the highly oriented 1D transport pathway and the polarization-induced internal electric field within P(VDF-TrFE)/perovskite hybrid nanowire arrays.

A Review of Diverse Halide Perovskite Morphologies for Efficient Optoelectronic Applications

“…As a result, the as‐fabricated flexible photodetectors showcased a high detectivity (7.3 × 10 12 Jones), a fast response time (the rise time of 88 µs and the decay time of 154 µs) and a superior mechanical stability. This research has provided a promising route to fabricate high‐quality semitransparent, flexible, and self‐powered photodetector …”

Air‐Stable Highly Crystalline Formamidinium Perovskite 1D Structures for Ultrasensitive Photodetectors

“…[1][2][3][4][5][6][7][8][9][10][11][12] Perovskite materials combine long carrier diffusion length, tunable bandgap and considerable carrier mobility with solution processability, which permits fabrication of high-performance optoelectronic devices in a large-scale and lowcost approach. [13][14][15][16][17][18][19][20][21][22][23][24] In perovskite family, FAPbI 3 possesses a smaller bandgap of 1.48 eV close to the Shockley-Queisser limit (1.34 eV) and enhanced thermal stability. [25][26][27][28][29] However, its α-phase experiences a spontaneous transition to a non-perovskite hexagonal polymorph (δ-phase), which is thermodynamically stable at ambient temperature.…”

Nested Inverse Opal Perovskite toward Superior Flexible and Self‐Powered Photodetection Performance

“…In this scenario, engineering perovskite films with various nano‐ and microstructures including quantum dots (QDs), nanowires, and nanosheets, can efficiently resolve the above issues, due to their large surface‐to‐volume ratios, stress relaxation behavior, and quantum confinement effects. [ 21–29 ] For example, Zheng et al prepared a flexible and transparent photodetector based on co‐electrospun MAPbI 3 QDs/TiO 2 nanotubes heterojunction. [ 21 ] The efficient carrier separation and transport through the 1D transport pathway contribute to the high responsivity and fast response speed.…”