Simultaneous improvement of Jsc, Voc and FF of polymer solar cells with CuI as hole transport layer

doi:10.3969/j.issn.0253-2778.2017.07.010

Journal of University of Science and Technology of China ›› 2017, Vol. 47 ›› Issue (7): 621-626.DOI: 10.3969/j.issn.0253-2778.2017.07.010

• Original Paper • Previous Articles

Simultaneous improvement of Jsc, Voc and FF of polymer solar cells with CuI as hole transport layer

SU Hetang, ZHAO Yuxia, DING Jian, DONG Kexiu, YU Wenjuan, HE Ye

1.Department of Mechanical and Electrical Engineering, Chuzhou Vocational and Technical College, Chuzhou 239000, China;
2.School of Mechanical and Electronic Engineering, Chuzhou University, Chuzhou 239000, China;
3.School of Foreign Languages, Chuzhou University, Chuzhou 239000, China.

Received:2016-12-16 Revised:2017-07-17 Online:2017-07-31 Published:2017-07-31
Contact: YU Wenjuan
About author:SU Hetang, male, born in 1966, Master/Associate Professor. Research field: Solar cells, machine electricity. E-mail: chuzhoushu@163.com
Supported by:
Supported by the University Natural Science Research Project of Anhui Province (KJ2017A417, KJ2015A153), Scientific Research Starting Fund of Chuzhou University (2016qd05).

Abstract

Abstract: A novel buffer layer copper iodide (CuI) was introduced into PCDTBT, PC70BM polymer solar cells (PSCs), where the CuI acts simultaneously as of hole transport layer (HTL) and electron block layer (EBL). Through depositing the CuI between the polymer and Ag and Au anodes, the hole collection ability has been increased. By optimizing the thickness of CuI and top anode, simultaneous enhancement of short-circuit current density (Jsc), open-circuit voltage (Voc), and fill factor (FF) has been achieved, leading to a dramatic increase of device efficiency, from 0.67% to 5.47% with 3 nm CuI and Au anode in comparison with the device without CuI. With thicker CuI, the efficiency decreases noticeably both for Au and Ag anodes due to the block effect. The result indicates that the CuI is an effective buffer layer for PCDTBT, PC70BM PSCs.

Key words: polymer solar cells, hole transport layer, copper iodide

CLC Number:

O157.4

SU Hetang, ZHAO Yuxia, DING Jian, DONG Kexiu, YU Wenjuan, HE Ye. Simultaneous improvement of Jsc, Voc and FF of polymer solar cells with CuI as hole transport layer[J]. Journal of University of Science and Technology of China, 2017, 47(7): 621-626.

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Simultaneous improvement of Jsc, Voc and FF of polymer solar cells with CuI as hole transport layer

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