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Magnetoconductance of polymer–fullerene bulk heterojunction solar cells

✍ Scribed by Yanlian Lei; Qunliang Song; Yong Zhang; Ping Chen; Rong Liu; Qiaoming Zhang; Zuhong Xiong

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
270 KB
Volume
10
Category
Article
ISSN
1566-1199

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✦ Synopsis

The organic magnetoconductance (MC) effects in poly(3-hexylthiophene): [6,6]-phenyl-C61-butyricacid methylester based bulk heterojunction solar cells were studied in dark and under illumination. The correlations between the MC and current character were revealed in this study. Results show that the dark current always exhibits a negative MC whereas a sign change in MC under illumination occurs at the bias around the open circuit voltage V oc . We suggest that the positive MC in photocurrent is due to the field dependent conversion of singlet electron-hole pairs to triplet states and the negative MC is associated with space charge limited current with traps. Other possible mechanisms about the magnetoconductance effects are also discussed.

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