Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 70, Issue -, Pages 67-73Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2022.02.025
Keywords
Polymer solar cell; Ternary strategy; Energy loss; Trade-off
Funding
- National Nat-ural Science Foundation of China [21975115, 21733005]
- Shen-zhen Fundamental Research Program [JCYJ20190809163011543, JCYJ20200109140801751]
- Guangdong Provincial Key Labora-tory of Catalysis [2020B121201002]
- Guangdong Innovative and Entrepreneurial Research Team Program [2016ZT06G587]
- Shenzhen Sci-Tech Fund [KYTDPT20181011104007, F30]
Ask authors/readers for more resources
Ternary strategy using two new synthetic acceptors with hydroxyl and acetoxy substitution was developed to enhance the performance of polymer solar cells. By fine-tuning the morphology, reducing the energy loss, and constructing a promising pathway for charge transfer, the efficiency of the solar cells was significantly improved.
Ternary strategy is a convenient and effective method to boost the performance of polymer solar cells (PSCs). Utilizing a ternary strategy to trade-off between the energy loss and the efficiency of devices however requires further exploration. Here, through the hydroxyl (-OH) and acetoxy (-OCOMe) substitution at beta-position of the IC terminal group, we developed two new synthetic acceptors, BTIC-OH-beta and BTICOCOMe-beta, which were designed to confine the morphology aggregation. Introduction of an analogue as the third component provides a simple but efficient way to further balance the short current density (J(sc)) and open-circuit voltage (V-oc), leading to a champion efficiency based on PBDB-T:PBDB-TF:BTIC-OCOMe-beta, effectively as high as 12.45%. The results were examined mainly in terms of the morphology characterization, electroluminescence external quantum efficiency (EQE(EL)), steady-state photoluminescence (PL) and transient technology. It suggested fine-tuning of the morphology by ratio modulation, reduction of the energy loss, construction of a promising pathway for charge transfer in the ternary system and enhancing the carrier extraction. In this way, a ternary strategy with an analogue donor could provide more routes to higher-quality solar cells. (c) 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available