Effect of Electric Field on Spray Deposited PCPDTBT Layer
| Autor: | Chaturvedi, N., Swami, S.K., Komarala, V.K., Dutta, V. |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| DOI: | 10.4229/eupvsec20142014-3bv.5.37 |
| Popis: | 29th European Photovoltaic Solar Energy Conference and Exhibition; 1581-1583 Poly [2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b’]dithiophene)-alt-4,7(2,1,3- benzothiadiazole)] (PCPDTBT) with low optical bandgap of 1.4 eV and an excellent light-harvesting material in organic photovoltaic was deposited using spray technique. Unlike the other methods of deposition like spin coating, inkjet printing etc. requiring post-deposition annealing, spray process under an electric field was done to achieve improvements in the film properties. The gas pressure and the electric field were used together for the atomization,with the electric field created by applying DC voltage of 500 V to the nozzle and circular electrode placed 4 mm below the nozzle. The crystallinity and absorption of PCPDTBT layer got enhanced in comparison to spray deposited PCPDTBT layer without the electric field. Different kinds of microstructures were formed in both the spray deposited PCPDTBT layer. These microstructures got uniform and finer on applying the DC voltage during spray deposition. Incorporation of electric field annealing as a part of the spray deposition to improve the deposited layer characteristics, along with inherent advantages of low cost, large area coverage, less material consumption and deposition on rigid as well as flexible substrates, will help in making better organic solar cells using this process. |
| Databáze: | OpenAIRE |
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