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

• Main Authors: Yi-LunChang, 張軼倫
• Other Authors: Wei-Chou Hsu
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/94ajav

碩士 === 國立成功大學 === 微電子工程研究所 === 106 === 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.