Influence of surface roughness on the efficiency of a flexible organic solar cell

Title
Influence of surface roughness on the efficiency of a flexible organic solar cell
Authors
오영제김세훈이득용
Keywords
Silver nanowire; Filtration/transfer method; Spin coating; Surface roughness; Organic solar cell
Issue Date
2020-01
Publisher
Journal of ceramic processing research
Citation
VOL 20, NO 1-49
Abstract
Organic solar cells (OSCs) without an over-coating layer, consisting of a silver nanowire (AgNW) transparent electrode, a poly(3,4-ethylenedioxythiphene):poly (styrenesulfonate) (PEDOT:PSS) layer, a poly(3-hexylthiophene-2,5-diyl):the [6,6]-phenyl C61 butyric acid methyl ester (P3HT:PCBM) active layer, a LiF/Al electron collecting, and a top electrode, were successfully fabricated in order to investigate the effect of surface roughness on the efficiency of OSCs. The AgNW transparent electrode on acryl resin coated polyethylene terephthalate (PET) film was prepared through the filtration/transfer method. Sheet resistance of 30 Ω-1 and surface roughness of 10.5 nm were detected. After coating the PEDOT:PSS hole transfer layer and the P3HT:PCBM active layer at 1000 rpm on the AgNW/PET transparent electrode, the surface roughness was reduced dramatically. However, open circuit voltage, short circuit current density, fill factor, and power conversion efficiency decreased as the coating speed was increased during the formation of the PEDOT:PSS layer and the P3HT:PCBM active layer due to the deterioration of the surface roughness. The surface roughness was determined to be crucial for the output performance of OSCs.
URI
http://pubs.kist.re.kr/handle/201004/71271
ISSN
1229-9162
Appears in Collections:
KIST Publication > Article
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