Origin of equilibrium charges in poly(3-hexylthiophene):[6,6]-phenyl-C₆₁-butyric acid methyl ester solar cell devices

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• 作者：Mathias Nyman ; Fredrik Pettersson ; Ronald ?sterbacka
• 关键词：Polymer ; Solar cell ; Fermi-level pinning ; CELIV
• 刊名：Chemical Physics
• 出版年：2012
• 出版时间：24 August, 2012
• 年：2012
• 卷：404
• 期：Complete
• 页码：60-63
• 全文大小：284 K

文摘

We have clarified the origin of equilibrium charges in poly(3-hexylthiophene):[6,6]-phenyl-C₆₁-butyric acid methyl ester devices by using charge extraction by a linearly increasing voltage. By varying the work function of the contacts we find that the equilibrium charges are injected from the contacts due to energy level alignment caused by Fermi-level pinning.