Cyclometalated Pt complex based random terpolymers as electron acceptors for all polymer solar cells

Xuyu Gao, Menghan Wang, Xudong Cao, Jie Yang, Yu Zhong, Zhiguo Zhang, Cheng Li, Sven Huettner, Youtian Tao, Yongfang Li, Wei Huang

科研成果: 期刊稿件文章同行评审

16 引用 (Scopus)

摘要

Various molar ratios of platinum complexes were introduced into the conjugated backbone of the well-studied poly[[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)](PNDIT2) acceptor polymer through random terpolymer approach. Terpolymers PNDIT2Ptx (x = 1, 2 and 5) exhibited slightly higher melting point (Tm), crystallization temperature, HOMO and LUMO energy levels than the control PNDIT2 copolymer due to the introduction of small amount of weaker electron-withdrawing bulky rigid Pt complex instead of strong electron-withdrawing flexible naphthalene diimide. When blended them with poly[[2,6′-4,8-di(5-ethylhexylthienyl)benzo[1,2-b;3,3-b] dithiophene] [3-fluoro-2[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7-Th) in all polymer solar cells, enhanced power conversion efficiency of 4.51% (3.74%) was obtained in terpolymer PNDIT2Pt1 based device compared to 3.88% (3.24%) of the control PNDIT2 at the same inverted (conventional) device conditions. The enhancement was probably ascribed to higher hole and electron transport ability and more efficient charge separation. To the best of our knowledge, this is the first example of random terpolymer acceptors based on heavy metal complexes.

源语言英语
页(从-至)105-115
页数11
期刊Journal of Polymer Science, Part A: Polymer Chemistry
56
1
DOI
出版状态已出版 - 1 1月 2018
已对外发布

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