TY - JOUR
T1 - P-doped all-small-molecule organic solar cells with power conversion efficiency of 17.73%
AU - Feng, Wanying
AU - Ma, Kangqiao
AU - Song, Guangkun
AU - Shao, Tianyin
AU - Liang, Huazhe
AU - Lu, Shudi
AU - Chen, Yu
AU - Long, Guankui
AU - Li, Chenxi
AU - Wan, Xiangjian
AU - Yao, Zhaoyang
AU - Kan, Bin
AU - Chen, Yongsheng
N1 - Publisher Copyright:
© 2023, Science China Press.
PY - 2023/8
Y1 - 2023/8
N2 - All-small organic solar cells (ASM OSCs) inherit the advantages of the distinct merits of small molecules, such as well-defined structures and less batch-to-batch variation. In comparison with the rapid development of polymer-based OSCs, more efforts are needed to devote to improving the performance of ASM OSCs to close the performance gap between ASM and polymer-based OSCs. Herein, a well-known p-dopant named fluoro-7,7,8,8-tetracyano-p-quinodimethane (FTCNQ) was introduced to a high-efficiency system of HD-1:BTP-eC9, and a high power conversion efficiency (PCE) of 17.15% was achieved due to the improved electrical properties as well as better morphology of the active layer, supported by the observed higher fill factor (FF) of 79.45% and suppressed non-radiative recombination loss. Furthermore, combining with the further morphology optimization from solvent additive of 1-iodonaphthalene (IN) in the blend film, the HD-1:BTP-eC9-based device with the synergistic effects of both FTCNQ and IN demonstrates a remarkable PCE of 17.73% (certified as 17.49%), representing the best result of binary ASM OSCs to date.[Figure not available: see fulltext.].
AB - All-small organic solar cells (ASM OSCs) inherit the advantages of the distinct merits of small molecules, such as well-defined structures and less batch-to-batch variation. In comparison with the rapid development of polymer-based OSCs, more efforts are needed to devote to improving the performance of ASM OSCs to close the performance gap between ASM and polymer-based OSCs. Herein, a well-known p-dopant named fluoro-7,7,8,8-tetracyano-p-quinodimethane (FTCNQ) was introduced to a high-efficiency system of HD-1:BTP-eC9, and a high power conversion efficiency (PCE) of 17.15% was achieved due to the improved electrical properties as well as better morphology of the active layer, supported by the observed higher fill factor (FF) of 79.45% and suppressed non-radiative recombination loss. Furthermore, combining with the further morphology optimization from solvent additive of 1-iodonaphthalene (IN) in the blend film, the HD-1:BTP-eC9-based device with the synergistic effects of both FTCNQ and IN demonstrates a remarkable PCE of 17.73% (certified as 17.49%), representing the best result of binary ASM OSCs to date.[Figure not available: see fulltext.].
KW - all-small-molecule
KW - organic solar cells
KW - p-dopant
KW - power conversion efficiency
UR - http://www.scopus.com/inward/record.url?scp=85163783524&partnerID=8YFLogxK
U2 - 10.1007/s11426-023-1616-2
DO - 10.1007/s11426-023-1616-2
M3 - Article
AN - SCOPUS:85163783524
SN - 1674-7291
VL - 66
SP - 2371
EP - 2379
JO - Science China Chemistry
JF - Science China Chemistry
IS - 8
ER -