Simulation study of the losses and influences of geminate and bimolecular recombination on the performances of bulk heterojunction organic solar cells

doi:10.1088/1674-1056/24/10/108501

中国物理B ›› 2015, Vol. 24 ›› Issue (10): 108501-108501.doi: 10.1088/1674-1056/24/10/108501

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Simulation study of the losses and influences of geminate and bimolecular recombination on the performances of bulk heterojunction organic solar cells

朱键卓, 祁令辉, 杜会静, 柴莺春

College of Science, Yanshan University, Qinhuangdao 066004, China

收稿日期:2015-03-06 修回日期:2015-07-15 出版日期:2015-10-05 发布日期:2015-10-05
基金资助:
Project supported by the Natural Science Foundation of Hebei Province, China (Grant No. A2012203016), the Science Fund from the Education Department of Hebei Province, China (Grant Nos. QN20131103 and Z2009114), the Doctor Foundation of Yanshan University, China (Grant No. B580), and the Young Teachers' Research Project of Yanshan University, China (Grant No. 13LGB028).

Simulation study of the losses and influences of geminate and bimolecular recombination on the performances of bulk heterojunction organic solar cells

Zhu Jian-Zhuo (朱键卓), Qi Ling-Hui (祁令辉), Du Hui-Jing (杜会静), Chai Ying-Chun (柴莺春)

College of Science, Yanshan University, Qinhuangdao 066004, China

Received:2015-03-06 Revised:2015-07-15 Online:2015-10-05 Published:2015-10-05
Contact: Zhu Jian-Zhuo, Du Hui-Jing E-mail:zhujz@ysu.edu.cn;hjdu@ysu.edu.cn
Supported by:
Project supported by the Natural Science Foundation of Hebei Province, China (Grant No. A2012203016), the Science Fund from the Education Department of Hebei Province, China (Grant Nos. QN20131103 and Z2009114), the Doctor Foundation of Yanshan University, China (Grant No. B580), and the Young Teachers' Research Project of Yanshan University, China (Grant No. 13LGB028).

摘要/Abstract

摘要： We use the method of device simulation to study the losses and influences of geminate and bimolecular recombinations on the performances and properties of the bulk heterojunction organic solar cells. We find that a fraction of electrons (holes) in the device are collected by anode (cathode). The direction of the corresponding current is opposite to the direction of photocurrent. And the current density increases with the bias increasing but decreases as bimolecular recombination (BR) or geminate recombination (GR) intensity increases. The maximum power, short circuit current, and fill factor display a stronger dependence on GR than on BR. While the influences of GR and BR on open circuit voltage are about the same. Our studies shed a new light on the loss mechanism and may provide a new way of improving the efficiency of bulk heterojunction organic solar cells.

关键词: bulk heterojunction organic solar cells, losses, device simulation, geminate recombination, bimolecular recombination

Abstract: We use the method of device simulation to study the losses and influences of geminate and bimolecular recombinations on the performances and properties of the bulk heterojunction organic solar cells. We find that a fraction of electrons (holes) in the device are collected by anode (cathode). The direction of the corresponding current is opposite to the direction of photocurrent. And the current density increases with the bias increasing but decreases as bimolecular recombination (BR) or geminate recombination (GR) intensity increases. The maximum power, short circuit current, and fill factor display a stronger dependence on GR than on BR. While the influences of GR and BR on open circuit voltage are about the same. Our studies shed a new light on the loss mechanism and may provide a new way of improving the efficiency of bulk heterojunction organic solar cells.

Key words: bulk heterojunction organic solar cells, losses, device simulation, geminate recombination, bimolecular recombination

中图分类号: (Semiconductor devices)

85.30.-z

88.40.jr (Organic photovoltaics)

朱键卓, 祁令辉, 杜会静, 柴莺春. Simulation study of the losses and influences of geminate and bimolecular recombination on the performances of bulk heterojunction organic solar cells[J]. 中国物理B, 2015, 24(10): 108501-108501.

Zhu Jian-Zhuo (朱键卓), Qi Ling-Hui (祁令辉), Du Hui-Jing (杜会静), Chai Ying-Chun (柴莺春). Simulation study of the losses and influences of geminate and bimolecular recombination on the performances of bulk heterojunction organic solar cells[J]. Chin. Phys. B, 2015, 24(10): 108501-108501.

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Simulation study of the losses and influences of geminate and bimolecular recombination on the performances of bulk heterojunction organic solar cells

Simulation study of the losses and influences of geminate and bimolecular recombination on the performances of bulk heterojunction organic solar cells

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