PHOTOVOLTAIC AND PHOTOCONDUCTIVE PROPERTIES OF ALUMINUM POLY(P-PHENYLENE VINYLENE) INTERFACES

Citation
H. Antoniadis et al., PHOTOVOLTAIC AND PHOTOCONDUCTIVE PROPERTIES OF ALUMINUM POLY(P-PHENYLENE VINYLENE) INTERFACES, Synthetic metals, 62(3), 1994, pp. 265-271
Citations number
25
Categorie Soggetti
Physics, Condensed Matter","Metallurgy & Mining
Journal title
ISSN journal
03796779
Volume
62
Issue
3
Year of publication
1994
Pages
265 - 271
Database
ISI
SICI code
0379-6779(1994)62:3<265:PAPPOA>2.0.ZU;2-V
Abstract
Photoconductive and photovoltaic properties of Al/PPV/ITO sandwich dev ices were investigated by measuring steady-state photocurrents resulti ng from illumination through the Al electrode. A built-in potential (V (bi)) was detected at the Al/PPV interface. The voltage dependence of the photocurrent in the vicinity of V(bi) was measured at 1 mW/cm2 of incident illumination to give an open-circuit voltage and a short-circ uit current of 1.2 V and 6 x 10(-7) A/cm2, respectively. The dependenc es of the short-circuit current on excitation wavelength and illuminat ion intensity are presented and the C-V characteristics of the Al/PPV interface are analyzed. The quantum collection efficiency decreased fr om 5% to 1% as the intensity of illumination increased from 10(-5) to 1 mW/cm2. The photovoltaic conversion power efficiency was about 0.07% for intensities approaching 1 mW/cm2. The V(bi) value was accounted f or by surface band-bending at the Al/PPV interface.