Effect of post-annealing treatment on the contact resistance of small molecule solar cells

Author

Wu, Jiaqi ; Wu, Wenjuan ; Xi, Xi ; Wang, Zhenjiao ; Qian, Hongqiang ; Jin, Guangyao ; Lu, Hongyan ; Zhu, Haidong ; Yang, Jian ; Ji, Jingjia ; Shi, Zhengrong ; Li, Guohua

Author_Institution

Suntech Power Corp., Ltd., Wuxi, China

fYear

2012

fDate

3-8 June 2012

Abstract

Small molecule solar cells with structure of ITO/ZnPc/C₆₀/LiF/Al were fabricated by vacuum evaporation method, and thermal annealing treatment was considered to be an effective and economized approach to further improve the power conversion efficiency and lifetime of devices. The optimal annealing process was 100°C, 20min in air ambient, and it respectively promoted the power conversion efficiency by 2.4 times and the stability of unencapsulated devices by 4.4 times As a conclusion, the main reason is attributed to the decrease of contact resistance. Moreover, the improvement of interfacial morphology at the ITO/ZnPc interface contributes the benefit.

Keywords

annealing; contact resistance; indium compounds; molecules; solar cells; zinc; contact resistance; post-annealing treatment effect; power conversion efficiency; small molecule solar cells; temperature 100 degC; time 20 min; vacuum evaporation method; Annealing; Artificial intelligence; Heterojunctions; Indium tin oxide; Photovoltaic cells; Physics; Polymers; contact resistance; interfacial morphology; small molecule solar cells; thermal annealing treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE

Conference_Location

Austin, TX

ISSN

0160-8371

Print_ISBN

978-1-4673-0064-3

Type

conf

DOI

10.1109/PVSC.2012.6318169

Filename

6318169