退火处理提高P3HT:PCBM聚合物太阳能电池光伏性能

doi:10.3866/PKU.WHXB20110414

Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (04): 875-880.doi: 10.3866/PKU.WHXB20110414

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles Next Articles

Photovoltaic Performance Improvement of P3HT:PCBM Polymer Solar Cells by Annealing Treatment

ZHUO Zu-Liang, ZHANG Fu-Jun, XU Xiao-Wei, WANG Jian, LU Li-Fang, XU Zheng

Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, P. R. China

Received:2010-12-13 Revised:2011-01-24 Published:2011-03-29
Contact: ZHANG Fu-Jun E-mail:fjzhang@bjtu.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (10804006, 60576016), Talent Plan of Red Berry of Beijing Jiaotong University, China, National Key Basic Research Program of China (973) (2010CB327704), National Outstanding Young Scientists Foundation of China (60825407), Natural Science Foundation of Beijing, China (1102028), Program of Introducing Talents of Discipline to Universities, China (B08002), and Fundamental Research Funds for the Central Universities, China (2011JBM123).

Abstract

Abstract:

Several polymer solar cells consisting of ITO/PEDOT:PSS/P3HT:PCBM/Al (indium tin oxide/ poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/poly(3-hexylthiophene):[6,6]-phenyl C61-butyric acid methyl ester/aluminum cathode) were fabricated by spin coating. The influence of annealing temperature on the performance of the polymer solar cells was studied using absorption spectra, photoluminescence spectra, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and atomic force microscopy (AFM). These devices were treated at 120 °C for 10 min in an ambient atmosphere and the best power conversion efficiency (PCE) of 2.00% was obtained at an open circuit voltage (V_oc) of 0.64 V, a short circuit current density (J_sc) of 10.25 mA·cm^-2, and a fill factor (FF) of 38.1%. The intensities of the absorption peaks at 560 and 610 nm increased because of the increased absorption π→π^* transition of P3HT after annealing treatment. XRD spectra showed that the intensity of the diffraction peaks at (100) for P3HT increased 1.8 times by comparison with that of the cells that did not undergo annealing treatment. The P3HT:PCBM phase separation increased markedly after annealing treatment, which is valuable for exciton dissociation. FTIR results also showed that the polymer materials did not deteriorate during the annealing treatment process.

Key words: Polymer solar cells, Phase separation, Exciton, Power conversion efficiency, Annealing treatment

MSC2000:

O646

ZHUO Zu-Liang, ZHANG Fu-Jun, XU Xiao-Wei, WANG Jian, LU Li-Fang, XU Zheng. Photovoltaic Performance Improvement of P3HT:PCBM Polymer Solar Cells by Annealing Treatment[J].Acta Phys. -Chim. Sin., 2011, 27(04): 875-880.

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Photovoltaic Performance Improvement of P3HT:PCBM Polymer Solar Cells by Annealing Treatment

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