Investigation Performance and Mechanisms of Inverted Polymer Solar Cells by Pentacene Doped P3HT : PCBMReportar como inadecuado




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International Journal of Photoenergy - Volume 2014 2014, Article ID 812643, 9 pages -

Research ArticleDepartment of Photonics, Research Center Energy Technology and Strategy, Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 701, Taiwan

Received 24 February 2014; Accepted 13 March 2014; Published 8 April 2014

Academic Editor: Ramunas Lygaitis

Copyright © 2014 Hsin-Ying Lee and Hung-Lin Huang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The inverted polymer solar cells PSCs with pentacene-doped P3HT : PCBM absorption layers were fabricated. It was demonstrated that the pentacene doping modulated the electron mobility and the hole mobility in the resulting absorption layer. Furthermore, by varying the doping content, the optimal carrier mobility balance could be obtained. In addition, the pentacene doping led to an improvement in the crystallinity of the resulting films and made an enhancement in the light absorption, which was partly responsible for the performance improvement of the solar cells. Using the space-charge-limited current SCLC method, it was determined that the balanced carrier mobility was nearly achieved when a pentacene doping ratio of 0.065 by weight was doped into the P3HT : PCBM : pentacene absorption layer. Compared with the inverted PSCs without the pentacene doping, the short circuit current density and the power conversion efficiency of the inverted PSCs with the pentacene doping ratio of 0.065 were increased from 9.73 mA-cm

to 11.26 mA-cm

and from 3.39% to 4.31%, respectively.





Autor: Hsin-Ying Lee and Hung-Lin Huang

Fuente: https://www.hindawi.com/



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