Inverted bulk-heterojunction organic solar cell using chemical bath deposited titanium oxide as electron collection layer

✍ Scribed by Takayuki Kuwabara; Hirokazu Sugiyama; Mitsuhiro Kuzuba; Takahiro Yamaguchi; Kohshin Takahashi

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 488 KB
• Volume: 11
• Category: Article
• ISSN: 1566-1199
• DOI: 10.1016/j.orgel.2010.04.008

✦ Synopsis

Chemical bath deposited titanium oxide (TiO x ) as an electron collection layer is introduced between the organic layer and the indium tin oxide (ITO) electrode for improving the performance of inverted bulk-heterojunction organic thin film solar cells with 1 cm 2 active area, where regioregular poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C 61 butyric acid methyl ester (PCBM) were mainly used as the photo-active layer. The uniform and thin TiO x film was easily prepared onto the ITO electrode in air by simple chemical bath deposition method. The cell performance was almost maintained in an ambient atmosphere under continuous light irradiation of 100 h despite non-sealing. The cell with bulk-heterojunction organic thin film consisted of [6.6] diphenyl C 62 bis(butyric acid methyl ester) (bis-PCBM) and P3HT prepared under best condition showed the power conversion efficiency (PCE) of 3.8% under the AM1.5G simulated sunlight.