Reduced Surface Roughness of P3HT:PCBM Thin Films with Different Ratios by Electrospray Deposition Methods

Takeshi FUKUDA  Kenji TAKAGI  Norihiko KAMATA  Jungmyoung JU  Yutaka YAMAGATA  

IEICE TRANSACTIONS on Electronics   Vol.E96-C   No.3   pp.362-364
Publication Date: 2013/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E96.C.362
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
electrospray deposition,  organic photovoltaic cell,  additive solvent,  surface roughness,  

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We demonstrated the reduced surface roughness of poly (3-hexylthiophene) (P3HT):(6,6)-phenyl-C61-butyric acid methyl ester (PCBM) thin films with different ratios fabricated by the electrospray deposition (ESD) method. Aggregated structures were observed at the lower voltage, and the uniformity became bad at the higher voltage. Anyway, the minimum root mean square (RMS) roughness was 1.46 nm by optimizing the applied voltage.