期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 21, 期 48, 页码 26557-26563出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cp05015a
关键词
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资金
- National Natural Science Foundation of China [21875286]
- National Key Research & Development Projects of China [2017YFA0206600]
- Science Fund for Distinguished Young Scholars of Hunan Province [2017JJ1029]
A new non-fullerene acceptor, namely Y10, based on dithienothiophen[3,2-b]-pyrrolobenzothiadiazole (TPBT) as the central core and 2-(6-oxo-5,6-dihydro-4H-cyclopenta[c]thiophen-4-ylidene)malononitrile (TC) as the electron-deficient end group, has been designed and synthesized. Y10 reveals a narrow optical energy gap (Eoptg) of 1.35 eV with a broad absorption band from 600 to 900 nm. A wide bandgap polymer, J11, as the donor material (Eoptg = 1.96 eV) is used to blend with Y10 for the construction of organic solar cell devices, which achieve an impressive power conversion efficiency (PCE) of 13.46% with an open circuit voltage (V-oc) of 0.89 V, a short circuit current (J(sc)) of 21.21 mA cm(-2), and a fill factor (FF) of 71.55%, with thermal annealing treatment at 100 degrees C for 5 min and 0.8 wt% 1-chloronaphthalene (CN) as an additive. These results indicate that the incorporation of the TPBT unit as the central core and the TC unit as the electron-deficient end group provides an efficient strategy for the construction of high performance solar cells.
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