Vol. 25 No. 2 (2015)
Papers

Optical Property and Photoelectrical Performance of a Low-bandgap Conducting Polymer Incorporated with Quantum Dots Used for Organic Solar Cells

Tran Thi Thao
UET-VNU
Bio
Vu Thi Hai
UET-VNU
Bio
Nguyen Nang Dinh
University of Engineering and Technology Vietnam National University, Hanoi
Bio
Le Dinh Trong
Hanoi Pedagogical University No. 2
Bio

Published 01-09-2015

How to Cite

Thao, T. T., Hai, V. T., Dinh, N. N., & Trong, L. D. (2015). Optical Property and Photoelectrical Performance of a Low-bandgap Conducting Polymer Incorporated with Quantum Dots Used for Organic Solar Cells. Communications in Physics, 25(2), 139. https://doi.org/10.15625/0868-3166/25/2/6200

Abstract

By using spin-coating technique, a low bandgap conjugated polymer, poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopen-ta[2,1-b;3,4-b′]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT)  and its composite thin films have been prepared. The optical absorption and photoconductive properties with over a wide spectral range, from 350 to 950  nm, were characterized. The obtained results showed that PCPDTBT:10 wt% CdSe  composite is the most suitable for efficient light-harvesting in polymer-based photovoltaic cells. The photoelectrical conversion efficiency (PCE) of the device with  a multilayer structure of ITO/PEDOT/ PCPDTBT:CdSe /LiF/Al  reached a value as large as 1.34% with an open-circuit voltage (Voc) = 0.57 V, a short-circuit current density (Jsc) = 4.29 mA/cm2, and a fill factor (FF) = 0.27. This suggests a useful application in further fabrication of quantum dots/polymers based solar cells.

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