Bulk heterojunction organic photovoltaic cell fabricated by the electrospray deposition method using mixed organic solvent

• DOI: 10.1002/pssr.201105232
• Publication Date: 2011-05-31T11:22:29Z
• Authors: Takeshi Fukuda; Kenji Takagi; Takashi Asano; Zentaro Honda; Norihiko Kamata; Keiji Ueno; Hajime Shirai; Jungmyoung Ju; Yutaka Yamagata; Yusuke Tajima
• Keywords: 0103 physical sciences; 7. Clean energy; 01 natural sciences

AbstractA high‐efficiency bulk heterojunction organic photovoltaic cell (OPV) was achieved by the electrospray deposition method. The surface roughness of the P3HT:PCBM thin film can be reduced using the mixed solvent consisting of o‐dichlorobenzene (o‐DCB) and acetone. The effect of acetone concentration is related to its dielectric constant. Under an optimized concentration of acetone in o‐DCB (20 vol%), the P3HT/PCBM active layer with a smooth surface can be formed, and the power conversion efficiency of the OPV was 1.9%.magnified image(© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)