Chinese Journal of Organic Chemistry >
Polymer Solar Cells with High Open-Circuit Voltage Based on Novel Barbell-Shaped Bifullerene Derivative as Acceptor
Received date: 2015-06-11
Revised date: 2015-08-19
Online published: 2015-09-15
Supported by
Project supported by the Fundamental Research Funds for the Central Universities (No. JUSRP111A22).
Polymer solar cells (PSCs) based on fullerene and its derivatives as acceptors are attracting extensive interest due to their advantages of wide materials, low cost and flexibility. The research of the accepting materials is considered to be a key factor to obtain high-efficiency PSCs, especially fullerene derivatives. In this regard, a novel barbell-shaped bifullerene derivative was designed and synthesized, and the structure was identified by 1H NMR, 13C NMR, MS and element analysis. Its absorption, electrochemistry, and geometry were studied systematically by UV, CV and Gaussian. Results showed that the bifullerene derivative can be used as acceptor for PSCs. The solubility of the derivative was effectively changed by increasing the alkyl chain in the molecule. The PSCs were fabricated with the structure of ITO/PEDOT:PSS/P3HT:bifullerene derivative/Ca/Al. After optimization of the ratio of bifullerene derivative and P3HT, the cells with the optimized conditions show that the power conversion efficiency (PCE) was 1.01% with Jsc of 2.73 mA/cm2 and Voc of 0.89 V. It is noteworthy that the open-circuit voltage was up to 0.89 V, which is more than 0.3 V that of PC60BM (Voc＝0.56 V). Our result provides a feasible choice for PSCs with high open-circuit voltage.
Guo Ying , Zhu Huaxin , Liu Guilin , Yan Huimin , Zhu Bingjie , Li Shuai , Sun Yajun , Li Guohua . Polymer Solar Cells with High Open-Circuit Voltage Based on Novel Barbell-Shaped Bifullerene Derivative as Acceptor[J]. Chinese Journal of Organic Chemistry, 2016 , 36(1) : 172 -178 . DOI: 10.6023/cjoc201506012
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