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Organic Solar Cells on Paper Substrates
Author(s) -
Rawat Madhu,
Jayaraman Eswaran,
Balasubramanian Sambathkumar,
Iyer S. Sundar Kumar
Publication year - 2019
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201900184
Subject(s) - fabrication , solar cell , materials science , substrate (aquarium) , organic solar cell , energy conversion efficiency , chemical engineering , layer (electronics) , root mean square , nanotechnology , optoelectronics , composite material , polymer , medicine , oceanography , alternative medicine , pathology , engineering , geology , electrical engineering
The fabrication of organic solar cells on paper substrate is attractive as it paves the way for roll‐to‐roll‐processed modules on more ecologically friendly substrates. A paper‐substrate solar‐cell process is successfully demonstrated. Commercially available paper with coatings from the polyvinyl family of materials is made suitable for electronic‐device fabrication. Smoothing layers of polyvinyl formal (PVF) with a knife‐edge coater give them an acceptable root mean square roughness of around 2.6 ± 0.2 nm. This paper is shown to be compatible with subsequent organic‐solar‐cell device fabrication with a variety of solvents including polar solvents. Top‐illuminated solar cells with blends of either poly(3‐hexylthiophene) and [6,6]‐phenyl C61 butyric acid methyl ester (PCBM), or poly({4,8‐bis[(2‐ethylhexyl)oxy]benzo[1,2‐b:4,5‐b′]dithiophene‐2,6‐diyl}{3‐fluoro‐2‐[(2‐ethylhexyl)carbonyl]thieno[3,4‐b]thiophenediyl}) and PCBM as photoactive layer having power conversion efficiencies up to 3.37% and 6.44%, respectively, are fabricated. A statistically significant number solar cells with different areas from multiple runs are fabricated and their solar cell parameters are analyzed and discussed. The results show strong promise for solar‐cell fabrication on environmentally friendly paper substrates.