Fabrication of Addressable Perovskite Film Arrays for High-Performance Photodetection and Real-Time Image Sensing Application

Abstract

Patterned growth of periodic perovskite film arrays is essential for application in sensing devices and integrated optoelectronic systems. Herein, we report on patterned growth of addressable perovskite photodetector arrays through an uncured polydimethylsiloxane (PDMS) oligomer-assisted solution-processed approach, in which a periodic hydrophilic/ hydrophobic substrate replicating the predesigned patterns of the PDMS stamp was formed due to the migration of uncured siloxane oligomers in the PDMS stamp to the intimately contacted substrate. By using this technique, MAPbI 3 film photodetector arrays with neglectable pixel-to-pixel variation, a responsivity of 2.83 A W −1 , specific detectivity of 5.4 × 10 12 Jones, and fast response speed of 52.7/57.1 μs (response/recovery time) were achieved. An 8 × 8 addressable photodetector array was further fabricated, which functioned well as a real-time image sensor with reasonable spatial resolution. It is believed that the proposed strategy will find potential application in large-scale fabrication of other photodetector arrays, which might be potentially important for future integrated optoelectronic devices.

Micro‐Nano Structure Functionalized Perovskite Optoelectronics: From Structure Functionalities to Device Applications

“…8 × 8 PD array was fabricated for real-time imaging (Figure 12d). [240] Wu et al presented an ultra-thin perovskite array via a vacuum-assisted drop-casting patterning method. The ultra-thin thickness was favorable to the excellent flexibility of PD array (Figure 12e), and the ultra-thin PD arrays can be attached a hemisphere support to realize the retina-like vision sensing.…”

“…Reproduced with permission. [ 240 ] Copyright 2021, American Chemical Society. e) Optical and SEM images of perovskite arrays (left).…”

“…8 × 8 PD array was fabricated for real‐time imaging (Figure 12d). [ 240 ] Wu et al. presented an ultra‐thin perovskite array via a vacuum‐assisted drop‐casting patterning method.…”

Advances in Photoelectric Detection Units for Imaging Based on Perovskite Materials

“…grew periodic hydrophilic and hydrophobic perovskite patterns with pixel size ≈ 25 µm by PDMS imprint method. [ 71 ] Furthermore, an 8 × 8 addressable PDUs array with good spatial resolution can be used as a real‐time image sensor (Figure 3j–l).…”

Self-Powered CsPbBr3 Perovskite Nanonet Photodetector with a Hollow Vertical Structure

“…Self-powered photodetectors (PDs) based on a semiconductor PN junction or Schottky barrier junction − have attracted much attention because they can power themselves through the detected signals, which benefits light and small PD-based systems since no external power supply equipment is required. − Currently, commercial self-powered PDs are mainly based on silicon, InGaAs, and so on. − However, for most of these devices, the incident light can only be illuminated from the top or the side during the test so that the opaque electrode (gold, copper, or aluminum, etc.) on the top will block part of the light from entering, which wastes the use of light and inhibits the improvement of device performance.…”