Investigation of Spray-cast Multilayer Perovskite Solar Cell Utilizing CuO Transport Layer

Abstract

In the research of recent years perovskite solar cells have exhibited an extraordinary advance in power conversion efficiency being regarded as an extremely promising photovoltaic material However there are two main reasons it cannot be applied to large scale manufacture First since perovskite materials are instable against moisture and oxygen in ambient condition there is much room for improvement of device stability Moreover the perovskite active layer usually needs to be deposited in N2-filled glove box also increasing the inconvenience of fabrication Second in the research of perovskite solar cells the spin coating method is the mostly applied Though it is capable of depositing thin films with good quality simply it will waste a lot of materials in the process and unconsciously increase the manufacturing costs In order to make perovskite solar cells development toward large-scale industrial manufacture in the future we improved the two points mentioned above in the thesis PEDOT:PSS is a commonly used material as hole transporting layer in perovskite solar cells even though the acidy and hygroscopicity of the material tend to accelerate the degradation of perovskite active layer further reducing the device stability significantly As a result in the first part of this thesis we replaced PEDOT:PSS with spray-casted CuO and increased the stability of devices In the second part we utilized a fast preparation of perovskite active layer by spray deposition making it capable of fabricating under ambient condition and it didn’t need any post-annealing method Finally we combined the CuO hole transporting layer in the first part demonstrating the glove-box-free spin-coating-free spray cast multilayer perovskite solar cells

Date of Award	2019
Original language	English
Supervisor	Wei-Chou Hsu (Supervisor)