Title :
Efficient organic photovoltaic tandem cells with poly (3-hexylthiophene): Fullerene active layers and transparent conductive oxide interlayer
Author :
Sakai, Jun ; Kawano, Kenji ; Yamanari, Toshihiro ; Taima, Tetsuya ; Yoshida, Yuji ; Fujii, Akihiko ; Ozaki, Masanori
Author_Institution :
Div. of Electr., Electron. & Inf. Eng., Osaka Univ., Suita, Japan
Abstract :
Efficient organic photovoltaic tandem cells consist of P3HT:bis[60]PCBM and P3HT:[70]PCBM active layers and transparent conductive oxide interlayer are presented. A short circuit current and a conversion efficiency are estimated at more than 6 mA/cm2 and 5 % from optical simulation and optimization of the both active layer thicknesses. We clarify the almost same characteristics is achieved by the development of the nanoscale phase separation process of the active layers and the interlayer with the Indium. Tin Oxide (ITO) sandwiched by MoO3 and LiF buffer layers. This is attributed to the improvement of carrier transport property in the active layers and interlayer.
Keywords :
buffer layers; indium compounds; lithium compounds; molybdenum compounds; organic semiconductors; phase separation; polymer films; semiconductor thin films; short-circuit currents; solar cells; tin compounds; ITO-MoO3-LiF; buffer layers; carrier transport; conversion efficiency; fullerene active layers; nanoscale phase separation; organic photovoltaic tandem cells; poly (3-hexylthiophene); short circuit current; transparent conductive oxide interlayer; Absorption; Charge carriers; Heterojunctions; Indium tin oxide; Materials science and technology; Optical buffering; Optical films; Photovoltaic systems; Polymers; Solar power generation;
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2009 34th IEEE
Conference_Location :
Philadelphia, PA
Print_ISBN :
978-1-4244-2949-3
Electronic_ISBN :
0160-8371
DOI :
10.1109/PVSC.2009.5411363