期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 46, 页码 25821-25827出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b07759
关键词
perylene bisimide; zinc oxide modifier; iverted organic photovoltaics; highly efficient; interfacial combination
资金
- Natural Science Foundation of China [51373054, 51303057, 51473052, 21334002]
- National Basic Research Program of China (973 Program) [2014CB643504, 2013CB834705]
- Fundamental Research Funds for the Central Universities [2015ZZ003, 2015ZY013]
- Introduced Innovative R&D Team of Guangdong [201101C0105067115]
We report the application of a perylene bisimide (PBI-H) as zinc oxide (ZnO) surface modifier to afford an organic-inorganic co-interlayer for highly efficient inverted organic photovoltaics (i-OPV). By thermal annealing, a N-Zn chemical bond formed between PBI-H and ZnO, inducing close organic-inorganic combination. In addition, this co-interlayer shows decreased work function and increased electron transportation and conductivity, which are benefits for the cathode to enhance charge extraction efficiency and decrease recombination losses. As a result a highly efficient i-OPV was achieved with a power conversion efficiency (PCE) of 9.43% based on this co-interlayer with PTB7:PC71BM as the active layer, which shows over 35% enhancement compared to that of the device without the PBI-H layer. Moreover, this co-interlayer was widely applicable for i-OPVs based on various material systems, such as P3HT:PC61BM and PTB7-Th:PC71BM, resulting in PCE as high as 4.78% and 10.31%, respectively.
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