CVD-deposited hybrid lead halide perovskite films for high-responsivity, self-powered photodetectors with enhanced photo stability under ambient conditions

Abstract

Hybrid lead halide perovskites possess highly attractive optoelectronic properties that make them suitable for high-performance, self-powered photodetectors. Chemical vapor deposition (CVD) allows the large-area fabrication of high-quality polycrystalline perovskite thin films with large grain size, hence highly attractive as the active layer for self-powered photodetectors. In this study, CVD-deposited perovskite films were employed to realize high-performance sandwich-type photodetectors responsive in the visible range. In self-powered mode, these devices delivered a responsivity as high as 112 A/W, a specific detectivity of 3.5 × 10 14 Jones and an external quantum efficiency of 22,042% under red light. Further, these devices exhibited good moisture stability and negligible photoresponse degradation after 2160 h in ambient conditions. The long-term stability of their photoresponse was additionally demonstrated under UV (λ = 365 nm) illumination at 1 mW/cm 2 for 500 h. Our CVD-deposited perovskite films offer a promising avenue for the realization of high-performance, self-powered photodetectors with good operating stability for next-generation optoelectronic systems and their applications. Self-powered vertical photodetectors were fabricated using CVD-deposited hybrid lead halide perovskite films. These photodetectors exhibited high responsivity and specific detectivity as well as an enhanced photo stability in ambient conditions. These findings illustrate that photodetectors based on CVD-deposited perovskite films have significant potential for future integrated smart sensor systems using miniaturized patterned arrays. • CVD-fabrication provides high quality perovskite films with predominant intrinsic photostability. • The resulting hybrid perovskite photodetectors exhibits high performance and operating stability. • CVD perovskite-based photo detectors exhibited a broad detection range with excellent figure-of-merit values.