Interpenetrating heterojunction photovoltaic cells based on C60 nano-crystallized thin films |
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| Affiliation: | 1. Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan;2. Research Center for Sustainable Energy and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan;3. Institute for Frontier Science Initiative (InFIniti), Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan;1. Department of Electrophysics, National Chiayi University, Chiayi, 600, Taiwan;2. Department of Materials Science and Engineering, National Chung Hsing University, Taichung, 402, Taiwan;1. Biomolecular and Organic Electronics, IFM, Linköping University, 58183 Linköping, Sweden;2. Intermodulation Products AB, Landa Landavägen 4193, 823 93 Segersta, Sweden;1. Department of Physics of Electronic Phenomena, Gdańsk University of Technology, 80-233 Gdańsk, Poland;2. Tele and Radio Research Institute, 03-450 Warszawa, Poland;1. Centre of Electrical and Energy Systems(CEES), Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia;2. Faculty of Electrical Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka |
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| Abstract: | An interpenetrating heterojunction (IHJ) structure facilitates efficient charge separation and transport in the active layer of organic photovoltaic cells (OPVs). Additionally, the recombination of generated carriers in IHJs is reduced as these networks exhibit high carrier transport with minimal recombination sites. We have developed a simple method to fabricate nanocrystallized fullerene (C60) films, which are produced by subjecting evaporated C60 films to either solvent spin-coating or solvent vapor annealing (SVA). The size of the rod-shaped nanocrystals in the films were controlled by changing the solvent and annealing time.An 80-nm-diameter size nanocrystallized C60 film that was fabricated using SVA with ethanol was incorporated as an acceptor material in an inverted IHJ OPV cell. Tetraphenyldibenzoperiflanthene (DBP) was evaporated onto the nanocrystallized C60 film as the donor material. The power conversion efficiency of an IHJ OPV cell (ITO/TiOx/nanocrystallized C60 film/DBP/MoO3/Au) increased from 1.79% to 2.12%, when compared with the conventional PHJ OPV cell. |
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| Keywords: | Nanocrystallization Nanostructure Solvent treatment Organic photovoltaic cells |
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