A microwave-assisted template-free route for large-scale synthesis of photoluminescent single crystal CsPbI3 nanotubes

Great efforts have been devoted to the synthesis of various CsPbX3 nanostructures in view of their excellent photovoltaic performance and promising optoelectronic applications. However, the preparation of high-quality one-dimensional cesium lead halide nanotubes still remains challenging and unexplored. Here, we report a microwave-assisted synthetic approach for high-quality single crystalline CsPbI3 nanotubes featuring highly uniform sizes and stable and bright photoluminescence. Furthermore, a CsPbI3 nanotube based photodetector was assembled, which exhibits high sensitivity, stability and a fast response to 405 nm wavelength light. As a new member of the all-inorganic CsPbX3 nanostructure family, CsPbI3 nanotubes could provide a potential platform for understanding their fundamental properties and paving the way for their future application in optoelectronic devices.