Chin. J. Org. Chem. ›› 2018, Vol. 38 ›› Issue (1): 228-236.DOI: 10.6023/cjoc201706026 Previous Articles     Next Articles



孙延娜, 高欢欢, 张雅敏, 王云闯, 阚斌, 万相见, 张洪涛, 陈永胜   

  1. 南开大学化学学院 元素有机化学国家重点实验室 纳米科学与技术研究中心功能高分子材料重点实验室 天津 300071
  • 收稿日期:2017-06-19 修回日期:2017-07-19 发布日期:2017-08-30
  • 通讯作者: 陈永胜
  • 基金资助:


An Efficient Ternary Organic Solar Cell with a Porphyrin Based Small Molecule Donor and Two Fullerene Acceptors

Sun Yanna, Gao Huanhuan, Zhang Yamin, Wang Yunchuang, Kan Bin, Wan Xiangjian, Zhang Hongtao, Chen Yongsheng   

  1. a State Key Laboratory of Elemento-Organic Chemistry, Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, College of Chemistry, Nankai University, Tianjin 300071
  • Received:2017-06-19 Revised:2017-07-19 Published:2017-08-30
  • Contact: 10.6023/cjoc201706026
  • Supported by:

    Project supported by the Ministry of Science and Technology (No. 2014CB643502), the Naional Natrual Science Foundation of China (Nos. 51373078, 51422304, 91433101) and the Natrual Science Foundation of Tianjin City (No. 17JCZDJC31100).

Recently, ternary organic solar cells have emerged as a promising strategy to achieve both high performance and fabrication simplicity for organic solar cells. It has been proved that this strategy is an effective way to achieve improved short-circuit current density (Jsc) with complementary absorption or to get enhanced open-circuit voltage (Voc) through forming energy level cascade. In this work, we designed and synthesized a thieno[3,2-b]thiphene-substituted porphyrin molecule flanked with two diketopyrrolopyrrole units by ethynylene bridges, named DEP-TT, which exhibited a very low energy bandgap of 1.31 eV and a broad light absorption to 898 nm. The power conversion efficiency (PCE) of binary devices based on DEP-TT and the acceptor [6,6]-phenyl-C71-butyric-acid-methyl-ester (PC71BM) achieved 7.46% with a relatively low Voc of 0.75 V. Futhermore, the ternary solar cells with 10% indene-C60 bis-adduct (ICBA) achieved high PCE of 8.15%, with higher Voc, Jsc and a relatively higher PCE based on organic solar cells with a porphyrin-small molecule as the donor. This improved performance is believed to be due to the energy level cascade and synergistic effects of the two acceptors of PCBM and ICBA, which suggestes that the ternary bulk heterojunction (BHJ) strategy is a promising way to improve both Voc and Jsc simultaneously and thus overall performance for the same donor material.

Key words: porphyrin small molecule donor, two fullerene acceptors, ternary organic solar cell