Intramolecular charge separation in spirobifluorene-based donor-acceptor compounds adsorbed on Au and Indium Tin Oxide electrodes

DANIEL HEREDIA, LUIS OTERO, MIGUEL GERVALDO *, FERNANDO FUNGO, THOMAS DITTRICH, CHIH-YEN LIN, LIANG-CHEN CHI, FU-CHUAN FANG, KEN-TSUNG WONG *

THIN SOLID FILMS

ELSEVIER SCIENCE SA

Lugar: Amsterdam; Año: 2013 vol. 527 p. 175 - 178

0040-6090

Surface photovoltage (SPV) measurements were performed with a Kelvin-probe in spirobifluorene-based donor (diphenylamine)?acceptor (dicyano or cyanoacrylic acid moieties) compounds adsorbed from highly diluted solutions onto Au and indium tin oxide electrode surfaces. Strong intramolecular charge separation (negative SPV signals up to more than 0.1 V) due to directed molecule adsorption was observed only for spirobifluorene donor?acceptor compounds with carboxylic acid moiety. SPV signals and onset energies of electronic transitions depended on ambience conditions.