Title :
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
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;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4673-0064-3
DOI :
10.1109/PVSC.2012.6318169
