High-performance ultraviolet photodetectors based on MAPbCl₃ perovskites for visible-light-insensitive defect detection

Abstract

Ultraviolet (UV) sensitive photodetectors (PDs) are highly desired for surface defect detection applications. Here, an ultra-stable and high-performance UV PDs with a TiO2/MAPbCl3/PTAA pin structure is achieved by vapor-phase anion...

Strategies for suppressing dark current of perovskite photodiodes towards reliable optoelectronic applications

“…Due to their remarkable optical and electrical properties, MHPPDs have showcased unparalleled performance, surpassing commercially available inorganic counterparts in recent years. In addition, formidable progress has been made in developing robust optoelectronic applications such as static imaging for visible and X-ray spectra, 141,186 real-time dynamic imaging, 182 communications, 102,107 and health monitoring. 91,187 Despite this, MHPPDs still face challenges related to defects within their structure that impair the dynamics of charge carriers, diminishing photodetection performance metrics like J d , LDR, D *, and speed.…”

Defect Engineering and Emission Tuning of Wide-Bandgap MAPbCl3 Perovskite

“…In parallel, lead-chloride perovskites with wide bandgap are promising candidates in applications such as visible-blind UV photodetection. − Due to shorter Pb-halide bond lengths and wider band gaps, transition energy levels of defects in lead-chloride perovskites shift deeper into the bandgap, and the established defect tolerance of lead-bromide and iodide perovskites is not preserved anymore. , The deep defects of lead-chloride perovskites not only increase the nonradiative recombination rates but also introduce extra radiative recombination channels which often give rise to sub-bandgap emission features. For instance, all-inorganic CsPbCl 3 single crystal was found to exhibit an additional minor emission peak near its main emission peak. , Similarly, organic–inorganic MAPbCl 3 single crystal displayed additional emissions near − or far apart from its intrinsic peak.…”