Application of Nanostructured Electrodes in Halide Perovskite Solar Cells and Electrochromic Devices

Efficiency and performance for lots of heterojunction optoelectronic devices depend on charge transport at interfaces and in bulk phases, such as solar cells and electrochromic (EC) devices. In the case of halide perovskite solar cells, the photoactive layer is between 300 and 500nm thick due to the increment of dark current, electron transport resistance, and charge recombination in thicker layer. Due to the directed charge transport path, nanowires (NWs) and nanorod-structured photoanodes can improve the performance of halide perovskite solar cells. In the case of EC device, fast response time and low driving voltage are critical parameters. In order to obtain a fast response time, high contrast, and low driving voltage, EC devices based on 3D nanostructured electrodes with large roughness factor were developed. In this chapter, researches on charge transport processes in these two different optoelectronic devices (nanostructured halide perovskite solar cells and EC devices) are presented.