期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 17, 页码 9274-9280出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b02012
关键词
polymer solar cells; perylene bisimides; nonfullerene acceptor; donor polymers
资金
- National Basic Research Program 973 [2014CB643501, 2013CB933500]
- NSFC [91333204, 51261160496, 21225209, 91427303]
- NSFC-DFG Joint Project [TRR61]
- Chinese Academy of Sciences [XDB12030200]
Among the diverse nonfullerene acceptors, perylene bisimides (PBIs) have been attracting much attention due to their excellent electron mobility and tunable molecular and electronic properties by simply engineering the bay and head linkages. Herein, guided by two efficient small molecular acceptors, we designed, synthesized, and characterized a new nonfullerene small molecule PPDI with fine-tailored alkyl chains. Notably, a certificated PCE of 5.40% is realized in a simple structured fullerene-free polymer solar cell comprising PPDI as the electron acceptor and a fine-tailored 2D-conjugated polymer PBDT-TS1 as the electron donor. Moreover, the device behavior, morphological feature, and origin of high efficiency in PBDT-TS1/PPDI-based fullerene-free PSC were investigated. The synchronous selection and design of donor and acceptor materials reported here offer a feasible strategy for realizing highly efficient fullerene-free organic photovoltaics.
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