Low-temperature process for self-powered lead-free Cs2AgBiBr6 perovskite photodetector with high detectivity

Regulating interface Schottky barriers toward a high-performance self-powered imaging photodetector

“…The photoresponse time is dened as the time required to increase from 10% to 90% of the maximum photocurrent (rise time, s r ) and decrease from 90% to 10% of the maximum photocurrent (decay time, s d ). 61,62 As shown in Fig. 3c, the photoresponse speed of the Pt-Ag photodetector was very fast, stable, and reproducible.…”

Solution‐Processing of CsPbClxBr3−x Perovskite Micro/Nanostructure Near‐Ultraviolet Photodetectors with High Performance

“…Herein, SnO 2 is used as an electron transport layer due to its high electron mobility (up to 240 cm 2 V −1 s −1 ) and good energy level, which enhances electron extraction and hole blocking and improves the electron transport efficiency, and reduces the recombination loss. [7] Carbon electrodes are used for their low cost. They can more easily contact perovskites to ensure efficient carrier transport; the larger thickness ensures the convenience of subsequent testing.…”

Lead-free all-inorganic halide double perovskite materials for optoelectronic applications: progress, performance and design

“…For instance, the PSC with the device structure of FTO/c-TiO 2 /mTiO 2 /Cs 2 Ag-BiBr 6 /HTL(PTAA)/Au showed a PCE of 1.26%, 87 while the efficiency of the Cs 2 AgBiBr 6 PSC with sensitized ETL achieved a maximum PCE of 4.23%. 88 Theoretically, Savory et al 89 predicted that the efficiency of solar cells composed of the Cs 2 AgBiX 6 double perovskite can be as high as 7.92%; however, there are still several limitations that need to be overcome before Cs 2 AgBiX 6 materials can be applied as solar absorbers and potential replacements of 64,96 For instance, a thin-film photodetector based on Cs 2 AgBiBr 6 was fabricated using spin-coating technology, which exhibited a responsivity, detectivity and external quantum efficiency approach of 7.01 A W À1 , 5.66 Â 10 11 Jones and 2146%, respectively. 97 Shuang et al 96 introduced an ionic liquid for the fabrication of Cs 2 AgBiBr 6 perovskites, achieving photodetectors with high performance, flexibility and stability at low temperature.…”