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International Journal of Photoenergy
Volume 2014, Article ID 689862, 5 pages
http://dx.doi.org/10.1155/2014/689862
Research Article

Semitransparent Polymer Solar Cells Based on Liquid Crystal Reflectors

Hebei Key Laboratory of Optic-Electronic Information Materials, College of Physics Science and Technology, Hebei University, Baoding, Hebei 071002, China

Received 19 February 2014; Revised 26 June 2014; Accepted 26 June 2014; Published 9 July 2014

Academic Editor: Mark van Der Auweraer

Copyright © 2014 Shaopeng Yang et al. 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 effects of liquid crystal (LC) reflectors on semitransparent polymer solar cells (PSCs) were investigated in this paper. By improving the cathode, we manufactured semitransparent PSCs based on the conventional PSCs. We then incorporated the LC reflector into the semitransparent PSCs, which increased the power conversion efficiency (PCE) from 2.11% to 2.71%. Subsequently adjusting the concentration and spinning speed of the active layer material changed its thickness. The maximum light absorption for the active layer was obtained using the optimum thickness, and the PCE eventually reached 3.01%. These results provide a reference for selecting LC reflectors that are suitable for different active layer materials to improve the PCE of semitransparent PSCs.