High-performance CsPbBr3 nanobelt photodetectors

All-inorganic perovskites hold great potential for applications in photodetectors due to their high absorption coefficient and excellent charge transport properties. However, they still face challenges such as high defect densities and insufficient stability. In this work, we successfully synthesized high-purity, high-crystallinity CsPbBr3 nanobelts via a hot-injection method with the introduction of the short-chain ligand octylamine. The as-prepared CsPbBr3 nanobelts can remain stable in air for more than 8 weeks. The photodetector constructed based on CsPbBr3 nanobelts exhibits excellent performance, with a responsivity, detectivity, and external quantum efficiency of 100.72 A W−1, 6.01 × 1013 Jones, and 3.34 × 104%, respectively, which are comparable to the best one-dimensional (1D) CsPbBr3 photodetectors reported to date. This study provides insights and guidance for the preparation of high-quality 1D CsPbBr3 nanomaterials and the development of high-performance ultraviolet devices.