常州大学材料科学与工程学院朱卫国

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在国家自然科学基金项目的支持下，2017年12月，常州大学材料科学与工程学院有机光电子材料与器件科研创新团队朱卫国教授与中国科学院青岛生物能源与过程研究所阳仁强研究员、青岛大学陈为超副教授合作，在高性能聚合物给体材料研究方面取得重要进展，聚合物太阳能电池器件的光电转换效率突破11.2%，达到国际先进水平。该成果以Significantly Enhancing the Efficiency of a New Light-Harvesting Polymer with Alkylthio naphthyl Substituents Compared to Their Alkoxyl Analogs 为题，近日已被国际顶级材料期刊《Advanced Energy Materials》(DOI: 10.1002/aenm.201702489，影响因子16.721) 在线接受发表。

[Abstract] In this work, a new benzo[1,2-b:4,5-b’]dithiophene (BDT) building block containing alkylthio naphthyl as a side chain is designed and synthesized, and the resulting polymer, namely PBDTNS-BDD, shows a lower HOMO energy level than that of its alkoxyl naphthyl counterpart PBDTNO-BDD. An optimized photovoltaic device using PBDTNS-BDD as a donor exhibits power conversion efficiencies (PCE) of 8.70% and 9.28% with the fullerene derivative PC71BM and the fullerene-free small molecule ITIC as acceptors, respectively. Surprisingly, ternary blend devices based on PBDTNS-BDD and two acceptors, namely PC71BM and ITIC, shows a PCE of 11.21%, which is much higher than that of PBDTNO-BDD based ternary devices (7.85%) even under optimized conditions.

文章链接：

http://onlinelibrary.wiley.com/doi/10.1002/aenm.201702489/full