2024, High-performance 1D CsPbBr3/CdS photodetectors, Rare Metals.

2024, High-performance 1D CsPbBr₃/CdS photodetectors, Rare Metals 

Abstract:

The emergence of all-inorganic perovskite CsPbBr3 has ignited significant interest in optoelectronic devices, However, CsPbBr3 thin film-based photodetectors face performance limitations due to grain boundaries and defect density. To address these challenges, we introduce a novel type II heterojunction photodetector utilizing CsPbBr3 microwires (MWs) and CdS nanoribbons (NBs). Remarkably, this photodetector exhibits exceptional characteristics: a high on/off current ratio (1.07 × 10⁵), a responsivity of up to 1.35 × 10⁴ A·W⁻¹, specific detectivity of 5.94 × 10¹⁵ Jones, external quantum efficiency of 2.83 × 10⁴% and rapid response/recovery time (400 μs/3 ms). These superior performances stem from the exceptional crystalline quality of CsPbBr3 MWs and CdS NBs, coupled with the establishment of a type II band alignment at their interface. This configuration enables efficient carrier separation while suppressing recombination. Importantly, 1D CsPbBr3MW/CdS NB heterojunction photodetectors demonstrate reliable imaging capabilities under visible light illumination. Our findings present an innovative solution for high-performance perovskite-based photodetectors, holding promise for future commercial applications.

Keywords: Perovskite CsPbBr3,  CdS nanoribbons,  Photodetectors, Type II band alignment.

Link: https://link.springer.com/article/10.1007/s12598-024-02741-6#citeas

High-performance 1D CsPbBr3:CdS photodetectors.pdf