Reduced Nonradiative Energy Loss Caused by Aggregation of Nonfullerene Acceptor in Organic Solar Cells
Abstract
Reducing energy loss (Eloss) is of critical importance to improving the photovoltaic performance of organic solar cells (OSCs). Although nonradiative recombination () is investigated in quite a few works, the method for modulating is seldom reported. Here, a new method of depressing Eloss is reported for nonfullerene OSCs. In addition to ternary‐blend bulk heterojunction (BHJ) solar cells, it is proved that a small molecular material (NRM‐1) can be selectively dispersed into the acceptor phase in the PBDB‐T:IT‐4F‐based OSC, resulting in lower and , and hence a significant improvement in the open‐circuit voltage (VOC); under an optimal feed ratio of NRM‐1, an enhanced power conversion efficiency can also be gained. Moreover, the role of NRM‐1 in the method is illustrated and its applicability for several other representative OSCs is validated. This work paves a new pathway to reduce the Eloss for nonfullerene OSCs.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 07, 2019
- Source ID
- 10.1002/aenm.201901823
Entities
People
- Bowei Xu
- Harald Ade
- Huifeng Yao
- Jianhui Hou
- Jingyi Kong
- Long Ye
- Shaoqing Zhang
- Ye Xu
- Yi Wu
- Yunpeng Qin
Organizations
- China Postdoctoral Science Foundation
- Chinese Academy of Sciences
- Institute of Chemistry
- National Natural Science Foundation of China
- North Carolina State University
- Office of Naval Research
- United States Department of Energy
- University of Science and Technology Beijing