Premium
Electronic Properties of Interfaces between PCPDTBT and Prototypical Electrodes Studied by Photoemission Spectroscopy
Author(s) -
Aygül Umut,
Peisert Heiko,
Frisch Johannes,
Vollmer Antje,
Koch Norbert,
Chassé Thomas
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201000999
Subject(s) - photoemission spectroscopy , materials science , heterojunction , indium tin oxide , spectroscopy , electrode , organic solar cell , electronic structure , indium , inverse photoemission spectroscopy , ultraviolet , optoelectronics , x ray photoelectron spectroscopy , nanotechnology , chemistry , thin film , physics , nuclear magnetic resonance , polymer , computational chemistry , quantum mechanics , composite material
Abstract We report on the electronic structure of poly[2,6‐(4,4‐bis‐ (2‐ethylhexyl)‐4H‐cyclopenta[2,1‐b;3,4‐b′]dithiophene)‐alt‐4,7(2,1,3‐benzothiadiazole)] (PCPDTBT), a promising low‐band‐gap donor material for efficient bulk heterojunction organic solar cells. Electronic properties of interfaces formed between PCPDTBT and prototypical electrodes [Au, indium‐tin‐oxide and poly(ethylene‐dioxythiophene): poly(styrenesulfonate)], obtained from X‐ray photoemission spectroscopy and ultraviolet photoemission spectroscopy, are evaluated. The formation of interface dipoles is observed, and their consequences for device performance are discussed. For the system PCPDTBT/Au chemical interactions occur, which may affect in particular the charge extraction at the corresponding interface.