期刊
ADVANCED ENERGY MATERIALS
卷 10, 期 35, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202001408
关键词
all-polymer solar cells; polymer acceptors; voltage loss
类别
资金
- National Basic Research Program of China (973 Program) [2013CB834701, 2014CB643501]
- Hong Kong Research Grants Council [T23-407/13 N, N_HKUST623/13, 16305915, 16322416, 606012]
- HK JEBN Limited
- HKUST president's office [FP201]
- Shenzhen Technology and Innovation Commission [JCYJ20170413173814007, JCYJ20170818113905024]
- National Key Research and Development Program of China [2019YFA0705900]
- National Science Foundation of China [21374090]
- Hong Kong Innovation and Technology Commission [ITC-CNERC14SC01]
- National Natural Science Foundation of China (NSFC) [21801124]
- HK-RGC [16306117, 16304218, 16306319]
Although the field of all-polymer solar cells (all-PSCs) has seen rapid progress in device efficiencies during the past few years, there are limited choices of polymer acceptors that exhibit strong absorption in the near-IR region and achieve high open-circuit voltage (V-OC) at the same time. In this paper, an all-PSC device is demonstrated with a 12.06% efficiency based on a new polymer acceptor (named PT-IDTTIC) that exhibits strong absorption (maximum absorption coefficient: 2.41 x 10(5)cm(-1)) and a narrow optical bandgap (1.49 eV). Compared to previously reported polymer acceptors such as those based on the indacenodithiophene (IDT) core, the indacenodithienothiophene (IDTT) core has further extended fused ring, providing the polymer with extended absorption into the near-IR region and also increases the electron mobility of the polymer. By blending PT-IDTTIC with the donor polymer, PM6, a high-efficiency all-PSC is achieved with a small voltage loss of 0.52 V, without sacrificingJ(SC)and FF, which demonstrates the great potential of high-performance all-PSCs.
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