Effect of Long Time Annealing and Incident Light Intensity on the Performance of Polymer: Fullerene Solar Cells

Author

Kim, Hwajeong ; Shin, Minjung ; Park, Jiho ; Kim, Youngkyoo

Author_Institution

Inst. of Biomed. Eng. (IBE), Imperial Coll. London, London, UK

Volume

9

Issue

3

fYear

2010

fDate

5/1/2010 12:00:00 AM

Firstpage

400

Lastpage

406

Abstract

In this paper, we report the effect of long annealing time device and the influence of incident light intensity on the performance of polymer solar cells prepared using a Ca/Al top electrode and a blend film of regioregular poly(3-hexylthiophene) and soluble fullerene as a photoactive layer. Results showed that the device performance exhibited a four-stage trend with annealing time, which was attributed to the continuous change of nanomorphology in blend films. In particular, the longest time annealing (300 min) did not degrade the device performance, thus indicating durability of the thin Ca electrode. Interestingly, an extremely high fill factor (76%-82%) was obtained at a low light intensity.

Keywords

annealing; fullerene devices; fullerenes; polymers; solar cells; C; Ca/Al top electrode; annealing time; blend film; continuous change; device performance; fill factor; four-stage trend; fullerene solar cells; incident light intensity; nanomorphology; photoactive layer; polymer solar cells; regioregular poly(3-hexylthiophene); soluble fullerene; thin Ca electrode; time 300 min; Calcium electrode; device annealing; fill factor (FF); incident light intensity; nanomorphology; polymer solar cells;

fLanguage

English

Journal_Title

Nanotechnology, IEEE Transactions on

Publisher

ieee

ISSN

1536-125X

Type

jour

DOI

10.1109/TNANO.2009.2027120

Filename

5164917