Photovoltaic Materials, Devices, and Technologies

Protonation process of conjugated polyelectrolytes on enhanced power conversion efficiency in the inverted polymer solar cells

[+] Author Affiliations
Chao Yi

University of Akron, Department of Polymer Engineering, Akron, Ohio 44325

Rong Hu, Shu Wang

Chinese Academy of Science, Institute of Chemistry, Beijing 10000, China

He Ren

University of Akron, Department of Polymer Engineering, Akron, Ohio 44325

Xiaowen Hu, Yong Cao

South China University of Technology, State Key Laboratory of Luminescence Materials and Devices, Guangzhou, Guangdong 510640, China

Xiong Gong

University of Akron, Department of Polymer Engineering, Akron, Ohio 44325

South China University of Technology, State Key Laboratory of Luminescence Materials and Devices, Guangzhou, Guangdong 510640, China

J. Photon. Energy. 4(1), 043099 (Jan 21, 2014). doi:10.1117/1.JPE.4.043099
History: Received October 26, 2013; Revised December 9, 2013; Accepted December 11, 2013
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Abstract.  In this study, two conjugated polyelectrolytes, polythiophene derivative (PTP) and poly[(9,9-bis [6-N, N, N-trimethylammonium] hexyl)-fluorenylene-phenylene] dibromide (PFP), are utilized to modify the surface properties of ZnO electron extraction layer (EEL) in the inverted polymer solar cells (PSCs). Both higher short-circuit current densities and larger open-circuit voltages were observed from the inverted PSCs with ZnO/PFP or ZnO/PTP as compared with those only with ZnO EEL. The protonation process for PTP and PFP in solution is distinguished. Overall, more than 40% enhanced power conversion efficiency (PCE) from the inverted PSCs with ZnO/PFP, in which the PFP could be fully ionized in deionized water, and more than 30% enhanced PCE from the inverted PSCs with ZnO/PTP, as the case that the PTP could not be fully ionized in deionized water, as compared with the inverted PSCs with ZnO EEL were observed, respectively. These results demonstrate that the conjugated polyelectrolytes play an important role in enhancement of device performance of inverted PSCs and that the protonation process of the conjugated polyelectrolytes is critical to the modification for EEL in PSCs.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Chao Yi ; Rong Hu ; He Ren ; Xiaowen Hu ; Shu Wang, et al.
"Protonation process of conjugated polyelectrolytes on enhanced power conversion efficiency in the inverted polymer solar cells", J. Photon. Energy. 4(1), 043099 (Jan 21, 2014). ; http://dx.doi.org/10.1117/1.JPE.4.043099


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