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Improvement of photovoltaic performances of organic thin‐film solar cells by fast electron mobility oxadiazole as an exciton blocking layer material
Author(s) -
Ichikawa Musubu,
Shimizu Chieko,
Koyama Toshiki,
Taniguchi Yoshio
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200723290
Subject(s) - photovoltaic system , exciton , materials science , layer (electronics) , amorphous solid , organic solar cell , active layer , oxadiazole , deposition (geology) , electrode , thin film , optoelectronics , energy conversion efficiency , blocking (statistics) , nanotechnology , chemical engineering , polymer , chemistry , composite material , condensed matter physics , organic chemistry , electrical engineering , physics , engineering , biology , paleontology , sediment , thin film transistor , mathematics , statistics
We demonstrated improvements of photovoltaic performances of organic thin‐film solar cells using an oxadiazole compound (Bpy‐OXD) as an exciton blocking layer (EBL) material. Due to fast electron mobility of Bpy‐OXD of above 10 –3 cm 2 /Vs, the photovoltaic cell with Bpy‐OXD showed higher performance than that with bathocuproine, a conventional EBL material. High amorphous nature of Bpy‐OXD with high glass transition temperature of 106 °C probably also caused a part of the improvements because of protecting photovoltaic layers from damaging during upper metal electrode deposition. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)