Transparent p-type CuI film based self-powered ultraviolet photodetectors with ultrahigh speed, responsivity and detectivity

Abstract

Currently, ultraviolet photodetectors attract extensive attention from people all over the world due to their applications in solar ultraviolet radiation detection, flame detection, ozone monitoring, missile tracking, and environmental monitoring....

Self-Powered Infrared Photodetectors with Ultra-High Speed and Detectivity Based on Amorphous Cu-Based MOF Films

“…This can be attributed to the photogenerated carriers increase of the p-a-Cu-HHTP film after absorbing light. The inset I – V curve exhibits a linear relationship, indicating good Ohmic contact between the p-a-Cu-HHTP film and the Ag electrode Figure c displays the current–time curve of the MSM PD when exposed to 980 nm light at 1000 μW cm –2 .…”

“…To better evaluate its performance, Figure d–f shows the photocurrent ( I ph ), responsivity ( R ), , and detectivity ( D *) at different light intensities. I ph = I light – I dark , expressed as the difference between the light and the dark current Figure d shows the photocurrent versus light intensity and the corresponding fitted curves, which follow a power-law relationship I ph ∝ P .…”

“…The inset I−V curve exhibits a linear relationship, indicating good Ohmic contact between the p-a-Cu-HHTP film and the Ag electrode. 41 Figure 5c displays the current− time curve of the MSM PD when exposed to 980 nm light at 1000 μW cm −2 . One switching cycle is 40 s, and the device switches well when the light source switches alternately.…”

“…I ph = I light − I dark , expressed as the difference between the light and the dark current. 41 Figure 4d shows the photocurrent versus light intensity and the corresponding fitted curves, which follow a power-law relationship I ph ∝ P. 0.42 Responsivity is a physical quantity that describes the photoconversion capability of a device and is defined as…”

High-performance p-type transparent conducting CuI–Cu2O thin films with enhanced hole mobility, surface, and stability

“…The surface roughness of CuI films prepared through the iodination of Cu films has been reduced to a minimum of less than 1 nm. 34 This level of smoothness is attainable when the film thickness is extremely thin, approximately 19 nm. The instability of CuI films leads to issues like recrystallization, iodine loss, and oxidation of Cu( i ), causing a notable reduction in both transparency and conductivity over time within ambient conditions.…”