期刊
NANO RESEARCH
卷 14, 期 5, 页码 1319-1325出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-020-3169-y
关键词
oscillating stratification preprocessing; graded vertical phase separation; non-fullerene organic solar cells; high performance; sequential solution deposition
类别
资金
- Foundation of National Natural Science Foundation of China (NSFC) [61421002, 61675041, 51703019]
- Sichuan Science and Technology Program [2019YFG0121, 2019YJ0178, 2020YFG0279, 2020YFG0281]
- China Scholarship Council [201806070051]
- Sichuan Province Key Laboratory of Display Science and Technology
In order to improve the power conversion efficiency of non-fullerene organic solar cells, researchers have developed a simple oscillating stratification preprocessing method to facilitate the formation of graded vertical phase separation among the bulk-heterojunction layer, resulting in a significant improvement in PCE.
Non-fullerene organic solar cell (NFOSC) has attracted tremendous attention due to their great potential for commercial applications. To improve its power conversion efficiency (PCE), generally, sequential solution deposition (SSD) methods have been employed to construct the graded vertical phase separation (VPS) of the bulk-heterojunction (BHJ) active layer for efficient exciton separation and charge transition. However, a variety of orthogonal solvents used in the SSD may lead to the unpredicted change in the BHJ morphology and introduce additional defects inside the BHJ bulk thus complicate the fabrication process. Here, a simple oscillating stratification preprocessing (OSP) is developed to facilitate the formation of graded VPS among the BHJ layer. As a result, a significant improvement is obtained in PCE from 10.96% to 12.03%, which is the highest value reported among PBDB-T: ITIC based NFOSC.
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