標題: | Interface Engineering to Enhance the Efficiency of Conventional Polymer Solar Cells by Alcohol-/Water-Soluble C-60 Materials Doped with Alkali Carbonates |
作者: | Lai, Yu-Ying Shih, Ping-I Li, Yi-Peng Tsai, Che-En Wu, Jhong-Sian Cheng, Yen-Ju Hsu, Chain-Shu 應用化學系 Department of Applied Chemistry |
關鍵字: | polymer solar cells;interface engineering;hydrophilic fullerene materials;electron-selective layer;dopant;alkali carbonates |
公開日期: | 12-六月-2013 |
摘要: | Two new C-60-based n-type materials, EGMC-OH and EGMC-COOH, functionalized with hydrophilic triethylene glycol groups (TEGs), have been synthesized and employed in conventional polymer solar cells. With the assistance of the TEG-based surfactant, EGMC-OH and EGMC COOH can be dissolved in highly polar solvents to implement the polar/nonpolar orthogonal solvent strategy, forming an electron modification layer (EML) without eroding the basis of ITO/PEDOT:PSS/P3HT:PC61M/EML/Ca/Al configuration with the insertion of the EGMC OH and EGMC COOH EML between the active layer and the electrode have thus been successfully realized by cost-effective solution processing techniques. Moreover, the electron conductivity of the EML can be improved by incorporating alkali carbonates into the EGMC-COOH EML. Compared to the pristine device with a PCE of 3.61%, the devices modified by the Li2CO3-doped EGMC-COOH EML achieved a highest PCE of 4.29%. Furthermore, we demonstrated that the formation of the EGMC-COOH EML can be utilized as a general approach in the fabrication of highly efficient multilayer conventional devices. With the incorporation of the EGMC-COOH doped with 40 wt % Li2CO3, the PCDCTBT-C8:PC17BM-based device exhibited a superior PCE of 4.51%, which outperformed the corresponding nonmodified device with a PCE of 3.63%. |
URI: | http://dx.doi.org/10.1021/am400962e http://hdl.handle.net/11536/22296 |
ISSN: | 1944-8244 |
DOI: | 10.1021/am400962e |
期刊: | ACS APPLIED MATERIALS & INTERFACES |
Volume: | 5 |
Issue: | 11 |
起始頁: | 5122 |
結束頁: | 5128 |
顯示於類別: | 期刊論文 |