Title :
Role of electrode buffer layers in organic solar cells
Author :
Sakurai, Takayasu ; Shenghao Wang ; Toyoshima, S. ; Akimoto, Katsuhiro
Author_Institution :
Inst. of Appl. Phys., Univ. of Tsukuba, Tsukuba, Japan
Abstract :
A systematic study on the energy level alignment, electron doping, and exciton quenching at interfaces between bathocuproine (BCP) buffer layers and various types of metal cathodes in organic solar cells (OSCs) was carried out by performing ultraviolet photoelectron spectroscopy (UPS), electronic conductivity, and photoluminescence (PL) measurements. Suppression of energy losses, such as low contact resistance and reduction of exciton quenching, were found at the metal cathodes with the BCP buffer layers. Impact of buffer/cathode interface properties on the performance of OSCs is discussed in detail.
Keywords :
buffer layers; contact resistance; doping; electrochemical electrodes; excitons; photoluminescence; quenching (thermal); solar cells; ultraviolet photoelectron spectra; BCP buffer layers; OSC; UPS; bathocuproine; electrode buffer layers; electron doping; electronic conductivity; energy level alignment; energy losses; exciton quenching; low contact resistance; metal cathodes; organic solar cells; photoluminescence; ultraviolet photoelectron spectroscopy; Buffer layers; Cathodes; Conductivity; Energy states; Glass; Metals; Uninterruptible power systems; buffer layer; energy level alignment; exciton quenching; organic solar cells;
Conference_Titel :
Renewable and Sustainable Energy Conference (IRSEC), 2013 International
Conference_Location :
Ouarzazate
Print_ISBN :
978-1-4673-6373-0
DOI :
10.1109/IRSEC.2013.6529640
