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Title: The effects of molecular weight of a new hole transporting polymer on the organic solar cells performance
Authors: Li, Xianqiang
Li, Jun
Wang, Hong
Wu, Dan
Tang, Xiaohong
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Organic Solar Cells
Molecular Weight
Issue Date: 2016
Source: Li, X., Li, J., Wang, H., Wu, D., & Tang, X. (2016). The effects of molecular weight of a new hole transporting polymer on the organic solar cells performance. Procedia Engineering, 139, 140-146. doi:10.1016/j.proeng.2015.08.1121
Series/Report no.: Procedia Engineering
Abstract: In this research, OSCs based on a new hole transporting polymer were fabricated. The highest power conversion efficiency of the device was received of 6.7% with the optimized molecular weight of the polymer. The charge carrier mobility in the OSCs was measured by using photoinduced charge extraction by linearly increasing voltage (PhotoCELIV) and time-of-flight (TOF) techniques. It is found that the charge carrier mobility is similar in the devices with both high and low molecular weight polymers. Light intensity dependence of the current-voltage characteristics was measured, which indicates strong bimolecular recombination in the low molecular weight polymer devices. Furthermore, the series and bulk resistances of the OSCs were obtained from the impedance measurement of the device. The high molecular device has a lower bulk resistance which corresponds to the weak bimolecular recombination of the device.
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2015.08.1121
Rights: © 2016 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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