A rare case of brominated small molecule acceptors for high-efficiency organic solar cells

A rare case of brominated small molecule acceptors for high-efficiency organic solar cells Научная публикация

Журнал

Nature Communications
ISSN: 2041-1723

Вых. Данные

Год: 2023, Том: 14, Номер: 1, Номер статьи : 4707, Страниц : DOI: 10.1038/s41467-023-40423-6

Авторы

Liang Huazhe ¹ , Bi Xingqi ¹ , Chen Hongbin ¹ , He Tengfei ¹ , Lin Yi ² , Zhang Yunxin ³ , Ma Kangqiao ¹ , Feng Wanying ¹ , Ma Zaifei ² , Long Guankui ³ , Li Chenxi ¹ , Kan Bin ³ , Zhang Hongtao ¹ , Rakitin Oleg A. ⁴ , Wan Xiangjian ¹ , Yao Zhaoyang ¹ , Chen Yongsheng ¹

Организации

1	State Key Laboratory and Institute of Elemento-Organic Chemistry, 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, 300071, Tianjin, China
2	State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, 201620, Shanghai, China
3	School of Materials Science and Engineering, National Institute for Advanced Materials, Renewable Energy Conversion and Storage Center (RECAST), Nankai University, 300350, Tianjin, China
4	N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

Given that bromine possesses similar properties but extra merits of easily synthesizing and polarizing comparing to homomorphic fluorine and chlorine, it is quite surprising very rare high-performance brominated small molecule acceptors have been reported. This may be caused by undesirable film morphologies stemming from relatively larger steric hindrance and excessive crystallinity of bromides. To maximize the advantages of bromides while circumventing weaknesses, three acceptors (CH20, CH21 and CH22) are constructed with stepwise brominating on central units rather than conventional end groups, thus enhancing intermolecular packing, crystallinity and dielectric constant of them without damaging the favorable intermolecular packing through end groups. Consequently, PM6:CH22-based binary organic solar cells render the highest efficiency of 19.06% for brominated acceptors, more excitingly, a record-breaking efficiency of 15.70% when further thickening active layers to ~500 nm. By exhibiting such a rare high-performance brominated acceptor, our work highlights the great potential for achieving record-breaking organic solar cells through delicately brominating.

Liang H. , Bi X. , Chen H. , He T. , Lin Y. , Zhang Y. , Ma K. , Feng W. , Ma Z. , Long G. , Li C. , Kan B. , Zhang H. , Rakitin O.A. , Wan X. , Yao Z. , Chen Y.
A rare case of brominated small molecule acceptors for high-efficiency organic solar cells
Nature Communications. 2023. V.14. N1. 4707 . DOI: 10.1038/s41467-023-40423-6 WOS Scopus OpenAlex

Web of science:	WOS:001043364000006
Scopus:	2-s2.0-85166598619
OpenAlex:	W4385606413

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