Journal
IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY
Volume 7, Issue 1, Pages 1129-1132Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JEDS.2019.2949685
Keywords
Spray-coating; organic solar cell; semitransparent; inverted; conductive polymer
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Funding
- Keimyung University
- National Research Council of Science & Technology (NST), Republic of Korea [EO190024] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We investigated a promising, low-cost method for fabrication of semitransparent organic solar cells by mass production. The active layer of the organic solar cells was added by spray coating with a dual action airbrush. The solution for the active layer was prepared from a rigorously blended poly(3-hexylthiophene-2,5-diyl) (P3HT) and (6,6)-Phenyl-C61 butyric acid methyl ester (PCBM) in 1,2-dichlorobenzene, and the surface morphology of the spray-coated active layer depending on the concentration of the P3HT and PCBM was investigated. The semitransparency achieved, came from the use of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) as the conductive polymer electrode. For comparison, spin-coated solar cells were also fabricated. Power-conversion efficiency and transparency was achieved from the lower cost spray-coating method that was comparable to those by the traditional spin-coating method. The best spray-coated solar cell exhibited power-conversion efficiency of 1.9% (average or 1.7%) while the best spin-coated solar cell was 2.0% (average of 1.6%), when both were measured under the AM1.5G spectrum 100 mW/cm(2) light. Transmittance of the spray-coated solar cell was 52.2% while that of the spin-coated solar cell was 51.2%.
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