TY - JOUR
T1 - Design of Halogenated Donors for Efficient All-Small-Molecular Organic Solar Cells
AU - Zhang, Chenyang
AU - Chang, Meijia
AU - Zhang, Yuanyuan
AU - Hu, Bin
AU - Lu, Guanghao
AU - Ding, Yun Tao
AU - Liu, Shuiren
AU - Liu, Xuying
AU - Meng, Lingxian
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/5/6
Y1 - 2024/5/6
N2 - Precise adjustment of the nanoscale morphology within the active layers is crucial for optimizing the photovoltaic performance of all-small-molecule organic solar cells (ASM-OSCs), and the halogen substituent strategy for photovoltaic materials plays a vital role in the development of the morphology evolution. In this work, we systematically study a series of acceptor-donor-acceptor (A-D-A) type small-molecule donors by incorporating halogenation at the thienyl benzo[1,2-b:4,5-b′]dithiophene (BDT-T) donor core unit named BSTR-F, BSTR-Cl, and BSTR-Br. Such halogenation is demonstrated to induce a significant increase in the ionization potential, i.e., deeper HOMO, and more ordered packing property. Using N3 as the acceptor, the BSTR-F-based devices achieve a power conversion efficiency (PCE) up to 15.93%, compared with the control nonhalogenated donor BSTR-H-based devices of 13.80%, indicating that the suitable halogenation strategy could effectively promote the high performance of ASM-OSCs.
AB - Precise adjustment of the nanoscale morphology within the active layers is crucial for optimizing the photovoltaic performance of all-small-molecule organic solar cells (ASM-OSCs), and the halogen substituent strategy for photovoltaic materials plays a vital role in the development of the morphology evolution. In this work, we systematically study a series of acceptor-donor-acceptor (A-D-A) type small-molecule donors by incorporating halogenation at the thienyl benzo[1,2-b:4,5-b′]dithiophene (BDT-T) donor core unit named BSTR-F, BSTR-Cl, and BSTR-Br. Such halogenation is demonstrated to induce a significant increase in the ionization potential, i.e., deeper HOMO, and more ordered packing property. Using N3 as the acceptor, the BSTR-F-based devices achieve a power conversion efficiency (PCE) up to 15.93%, compared with the control nonhalogenated donor BSTR-H-based devices of 13.80%, indicating that the suitable halogenation strategy could effectively promote the high performance of ASM-OSCs.
UR - https://www.scopus.com/pages/publications/85190730943
U2 - 10.1021/acsmaterialslett.4c00332
DO - 10.1021/acsmaterialslett.4c00332
M3 - 文章
AN - SCOPUS:85190730943
SN - 2639-4979
VL - 6
SP - 1984
EP - 1991
JO - ACS Materials Letters
JF - ACS Materials Letters
IS - 5
ER -
