A Medium Bandgap Dimeric Acceptor with High Open-Circuit Voltage for Efficient Organic Solar Cells

A Medium Bandgap Dimeric Acceptor with High Open-Circuit Voltage for Efficient Organic Solar Cells Научная публикация

Журнал

Materials Horizons
ISSN: 2051-6355

Вых. Данные

Год: 2025, DOI: 10.1039/d5mh00129c

Авторы

Lan Baofa ¹ , Yuan Shaohui ¹ , Zhong Yanyi ² , Zhao Wenkai ¹ , Wang Jia ¹ , Shi Wendi ³ , Long Guankui ¹ , Rakitin Oleg A ⁴ , Zhang Jiangbin ^2,5,6 , Han Kai ^2,6 , Kan Bin ¹ , Chen Yongsheng ³

Организации

1	School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China. longgk09@nankai.edu.cn.
2	College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China. hankai0071@nudt.edu.cn.
3	State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin 300071, China.
4	N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, 47 Leninsky Prospekt, Moscow, Russia.
5	Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, China.
6	Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China.

Dimeric acceptors (DMAs) exhibit significant potential for optimizing both the efficiency and stability of organic solar cells (OSCs). However, medium band-gap DMAs with a high open-circuit voltage (Voc) for efficient OSCs remain underexplored. In this study, we designed and synthesized a medium bandgap dimeric acceptor, designated DYO-1, through the strategy of alkoxy side-chain substitutions. The resultant DYO-1 exhibited an upshifted lowest unoccupied molecular orbital (LUMO) level and blue-shifted absorption. Notably, an o-xylene (o-XY) processed OSC with a PM6:DYO-1 binary blend achieved an ultra-high Voc of 1.022 V and a fill factor (FF) of 73.9%, resulting in a power conversion efficiency (PCE) of 15.1%. To our knowledge, this is the highest PCE reported thus far for dimer-based OSCs with a Voc exceeding 1.0 V. Furthermore, DYO-1 was incorporated into a PM6:L8-BO-X blend film, effectively reducing excessive aggregation of the host blend film, thus improving the carrier transport efficiency and enhancing both the short-circuit current (Jsc) and FF. Alongside the improvement in Voc, the PM6:L8-BO-X:DYO-1 based ternary OSC, which is prepared using an o-XY solvent, achieved a prominent PCE of 19.6%. Additionally, a module device with an effective area of 13.5 cm2 exhibited a PCE of 15.8%, highlighting the potential for large-area fabrications. Our study unveils the importance of medium bandgap dimeric acceptors in achieving efficient and stable OSCs, providing valuable insights into the design of high-performance electron acceptors.

Lan B. , Yuan S. , Zhong Y. , Zhao W. , Wang J. , Shi W. , Long G. , Rakitin O.A. , Zhang J. , Han K. , Kan B. , Chen Y.
A Medium Bandgap Dimeric Acceptor with High Open-Circuit Voltage for Efficient Organic Solar Cells
Materials Horizons. 2025. DOI: 10.1039/d5mh00129c WOS Scopus OpenAlex

Web of science:	WOS:001435767300001
Scopus:	2-s2.0-85219527272
OpenAlex:	W4407893839

БД	Цитирований
OpenAlex	10
Web of science	9
Scopus	9