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3 November 2004 Optimization of postproduction heat treatment for plastic solar cells
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We present this detailed study of a postproduction heat treatment of flexible organic solar cells based on regio-regular (RR) P3HT:PCBM composite in a wide temperature range from 75°C to 150°C. The efficiency of the photovoltaic device was significantly improved by postproduction heat treatment and both optimal annealing temperature and time dependencies were determined. Optimized parameters yielded >3% efficiency for devices on glass substrates and, using these optimized parameters, an efficiency of >2% was found for devices fabricated on flexible substrates. The optimal phase separation of PCBM and RR-P3HT into bi-continuous network structure occurs within a very short period of time and are very stable. We found that optimal concentration of PCBM in a RR-P3HT matrix is rather low, only 34 w.%. We show the performance of plastic solar cells fabricated on flexible substrates (ITO coated PET) using these optimized heat treatment parameters.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kanzan Inoue, Ross William Ulbricht, Pallavi Chandra Madakasira, William M. Sampson, Sergey Lee, Jose M. Gutierrez, John P. Ferraris, and Anvar A. Zakhidov "Optimization of postproduction heat treatment for plastic solar cells", Proc. SPIE 5520, Organic Photovoltaics V, (3 November 2004);

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