https://scholars.lib.ntu.edu.tw/handle/123456789/503270
標題: | Enhancing efficiency with fluorinated interlayers in small molecule organic solar cells | 作者: | Han, H.-C. Tseng, C.-A. Du, C.-Y. Ganguly, A. Chong, C.-W. Wang, S.-B. Lin, C.-F. Chang, S.-H. Su, C.-C. Lee, J.-H. Chen, K.-H. JIUN-HAW LEE |
公開日期: | 2012 | 出版社: | Royal Society of Chemistry | 卷: | 22 | 期: | 43 | 起(迄)頁: | 22899-22905 | 來源出版物: | Journal of Materials Chemistry | 摘要: | This study presents a simple approach to improve the performance of small molecule based organic solar cells (OSCs) by inserting a fluorinated buffer layer (e.g., PFAS) at the hetero-interface of bilayer devices. As demonstrated in this work, the PFAS modification reduces the surface energy of the conventional PEDOT:PSS photoanode and results in a significant improvement in the pentacene based OSC. The passivated PEDOT:PSS surface after PFAS modification has a lower interface energy with pentacene and facilitates 3D single crystalline (dendritic-like) phase pentacene growth. Concurrently, the accumulated negative charges of the fluorinated PFAS layer result in the development of interfacial dipole moments that in turn lead to an enhanced built-in potential across the devices, and consequently enhanced hole transport efficiency. Improved performance of the modified OSCs is evident from the ∼97% enhancement in efficiency from 0.88% to 1.73%, along with the open-circuit voltage improvement from 0.29 to 0.42 V. As well as improving the photovoltaic performance, the PFAS treatment also enhances the stability of the device under high temperature annealing, which is essential in the fabrication process. © 2012 The Royal Society of Chemistry. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/503270 | ISSN: | 09599428 | DOI: | 10.1039/c2jm34091g | SDG/關鍵字: | Bi-layer devices; Built-in potential; Fabrication process; Hetero interfaces; High-temperature annealing; Hole transports; Interface energy; Interfacial dipoles; Negative charge; Organic solar cell; PEDOT:PSS; Pentacenes; Photoanode; Photovoltaic performance; Simple approach; Single-crystalline; Small molecules; Conducting polymers; Molecules; Open circuit voltage; Solar cells |
顯示於: | 凝態科學研究中心 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。