Self-Powered Organometal Halide Perovskite Photodetector with Embedded Silver Nanowires

Abstract

Metal–semiconductor–metal (MSM) configuration of perovskite photodetectors (PPDs) suggests easy and low-cost manufacturing. However, the basic structures of MSM PPDs include vertical and lateral configurations, which require the use of expensive materials such as transparent conductive oxides or/and sophisticated fabrication techniques such as lithography. Integrating metallic nanowire-based electrodes into the perovskite photo-absorber layer to form one-half of the MSM PPD structure could potentially resolve the key issues of both configurations. Here, a manufacturing of solution-processed and self-powered MSM PPDs with embedded silver nanowire electrodes is demonstrated. The embedding of silver nanowire electrode into the perovskite layer is achieved by treating the silver nanowire/perovskite double layer with a methylamine gas vapor. The evaporated gold layer is used as the second electrode to form MSM PPDs. The prepared MSM PPDs show a photoresponsivity of 4 × 10−5 AW−1 in the UV region and 2 × 10−5 AW−1 in the visible region. On average, the devices exhibit a photocurrent of 1.1 × 10−6 A under white light (75 mW cm−2) illumination with an ON/OFF ratio of 83.4. The results presented in this work open up a new method for development and fabrication of simple, solution-processable MSM self-powered PPDs.

Metal nanowire-based transparent electrode for flexible and stretchable optoelectronic devices

“…The devices have a sensitivity of approximately 2 Â 10 À5 A W À1 in the visible spectrum, and 4 Â 10 À5 A W À1 in the UV region. 358 In addition, to avoid the reaction between Ag and the perovskite materials, AuNWs were also incorporated into a perovskite photodetector. Bao et al utilized an in situ patterned process to produce AuNW electrodes with an excellent conductivity and low surface roughness (Fig.…”

Metallic Micro‐Nano Network‐Based Soft Transparent Electrodes: Materials, Processes, and Applications

“…Ag NWs are widely employed as soft TEs for a range of photodetectors, including metal‐oxide heterojunction Schottky photodetectors, [ 235 ] capacitive ZnS:Cu photodetectors, [ 236 ] conventional ZnO photodetectors, [ 237 , 238 ] and perovskite photodetectors, [ 239 ] etc. Although Ag NWs are the most often utilized material for MMNN TEs used in photodetectors, Au networks may be a better option for specific devices, such as perovskite photodetectors, taking the band alignment into consideration.…”