Abstract
? 2022 Elsevier B.V.Two-dimensional perovskite Sr2Nb3O10 (SNO) nanosheets were synthesized using a typical calcination-exfoliation method. SNO nanosheets were then directly coated on the CuZnS film to construct a p-n heterojunction responsive in ultraviolet region. The as-integrated CuZnS/SNO device achieves a maximum responsivity of 14.8 mA/W and detectivity of 1.87 × 1011 Jones at 3 V and 300 nm, greatly exceeding pure SNO. In particular, the hybrid photodetector can steadily operate at zero bias with high on/off ratio (>3000) and fast response speed (1.1/7.9 ms), which is primarily ascribed to the efficient separation of photoinduced electron-hole pairs driven by the built-in electric field at the p-n junction interface. Moreover, the device exhibits decent responsivity (0.28 mA/W), good detectivity (4.61 × 1010 Jones), high spectral selectivity (R300/R400 = 2500), and wide linear dynamic range (59 dB) at 0 V, showcasing excellent self-powered features at 300 nm. This work strongly provides a promising avenue for developing high-performance self-powered ultraviolet photodetectors for practical applications.
NSTL
Elsevier