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

Tran Thi Thao, Vu Thi Hai, Nguyen Nang Dinh, Le Dinh Trong
Author affiliations


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




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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How to Cite

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



Received 16-05-2015
Published 01-09-2015

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