Regulating crystallization to maintain balanced carrier mobility via ternary strategy in blade-coated flexible organic solar cells

Zhang, Lin; Yang, Fang; Meng, Xiangchuan; Yang, Shuzhi; Ke, Lili; Zhou, Conghua; Yan, Hongping; Hu, Xiaotian; Zhang, Shaohua; Ma, Wei; Yuan, Yongbo

doi:10.1016/j.orgel.2020.106027

Regulating crystallization to maintain balanced carrier mobility via ternary strategy in blade-coated flexible organic solar cells

Journal Article · Sat Nov 27 00:00:00 EST 2021 · Organic Electronics

DOI:https://doi.org/10.1016/j.orgel.2020.106027· OSTI ID:1778012

^[1]; Yang, Fang ^[1]; Meng, Xiangchuan ^[2]; Yang, Shuzhi ^[1]; Ke, Lili ^[1]; Zhou, Conghua ^[1]; Yan, Hongping ^[3]; Hu, Xiaotian ^[2]; Zhang, Shaohua ^[2]; Ma, Wei ^[4]; Yuan, Yongbo ^[1]

Central South University, Changsha (China)
Nanchang University (China)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Xi'an Jiaotong Univ., Shaanxi (China)

Regulating the crystallization of donor and acceptor to maintain balanced carrier mobility is of great importance to fabricate efficient organic solar cells (OSCs). Herein, the balanced crystallinity between donor and acceptor was finely controlled in blade-coated OSCs. By adding high crystalline FOIC into PBDB-T:ITIC system, a balanced carrier mobility was achieved, resulting in the much improved fill factor. The optimized ternary device exhibits an increased current density, due to the enhanced light-harvesting efficiency with complementary absorption and the morphology change. Morphology characterization demonstrated that the ternary film exhibits a highly balanced crystallinity between the donor and acceptor on account of the formation of acceptor alloy. Moreover, the ternary film not only possesses a small domain size, but also exhibits a high domain purity as compared to both binary films. Encouragingly, a highest power conversion efficiency (PCE) of 10.68% was obtained for the blade-coated ternary OSCs. In addition, the blade-coated flexible large-area (105 mm²) OSC based on PBDB-T:ITIC:FOIC ternary system also exhibits a high PCE of 9.81%, showing great potential in the high-throughput fabrication of OSCs.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1778012

Alternate ID(s):: OSTI ID: 1809774

Journal Information:: Organic Electronics, Journal Name: Organic Electronics Vol. 89; ISSN 1566-1199

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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