期刊
ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 13, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202110743
关键词
charge transport; electronic structure; fill factor; power conversion efficiency; ternary organic solar cells
类别
资金
- National Natural Science Foundation of China [21875067]
- Shanghai Rising-Star [19QA1403100]
- East China Normal University Multifunctional Platform for Innovation
- open project of State Key Laboratory of Luminescent Materials and Devices [2021-skllmd-07]
Ternary architecture is an efficient strategy to improve the power conversion efficiency of single-junction organic solar cells. In this study, a ternary device with a power conversion efficiency of 18.13% and a fill factor of 80.10% was reported. The advantages of the designed ternary heterojunction are the complementary light absorption and the matched interfacial electronic structures, as well as the optimized microstructure and enhanced charge transport.
Ternary architecture is an efficient strategy to boost desired power conversion efficiency of single-junction organic solar cells (OSCs). Here, a ternary OSC by incorporating a compatible acceptor ITIC-M as a third component into state-of-the-art PM6:Y6 blend is reported, yielding a power conversion efficiency of 18.13% and an impressive fill factor of 80.10%. The efficiency is the highest record for the PM6:Y6 based ternary devices reported to date. The full advantages of the designed ternary heterojunction are the good complementary light absorption that increases the photocurrent, and the matched interfacial electronic structures featuring so-called pinning energies that facilitate exciton separation and suppress charge recombination loss. Furthermore, ITIC-M plays a vital role in optimizing the micromorphology of the ternary blend with better dispersity, well-formed fibrillar structure and enhanced crystallinity, thus boosting the charge transport and device performance.
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