Electric field in phthalocyanine/perylene heterojunction solar cells studied by electroabsorption and photocurrent measurements
- 15 August 2003
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 94 (4) , 2434-2439
- https://doi.org/10.1063/1.1592870
Abstract
The electric-field distribution in Au/Zn-phthalocyanine(ZnPc)/3,4,9,10-perylene-tetracarboxylbis-benzimidazole(PTCBI)/In/Al heterojunction solar cells is studied by electroabsorption and photocurrent measurements. In the PTCBI surface region near the PTCBI/In interface, a large anomalous electric field exists which is nearly bias independent and does not contribute to the photocurrent generation. This anomalous electric field exists only for the PTCBI-film thickness ⩾35 nm. The electric fields in the bulk of the PTCBI and ZnPc layers are responsible for the photocurrent generation. The bulk electric field in the PTCBI layer changes its sign at a forward bias, Vbias, of 0.3 V, while that in the ZnPc layer disappears for Vbias⩾0.5 V. The latter may indicate that holes are hardly trapped in the ZnPc layer.This publication has 13 references indexed in Scilit:
- Photovoltaic Properties of Ultramicrostructure-Controlled Organic Co-Deposited FilmsJapanese Journal of Applied Physics, 2002
- A non-ideal bias dependence of the inner electric field in Au/Zn-phthalocyanine/Al photovoltaic cells studied by electroabsorption and photocurrent measurementsSolid State Communications, 2001
- Plastic Solar CellsAdvanced Functional Materials, 2001
- 2.5% efficient organic plastic solar cellsApplied Physics Letters, 2001
- Electroabsorption studies of phthalocyanine/perylene solar cellsSolar Energy Materials and Solar Cells, 2000
- Chemical potential pinning due to equilibrium electron transfer at metal/C60-doped polymer interfacesJournal of Applied Physics, 1997
- Direct Measurement of Conjugated Polymer Electronic Excitation Energies Using Metal/Polymer/Metal StructuresPhysical Review Letters, 1996
- Direct measurement of the internal electric field distribution in a multilayer organic light-emitting diodeApplied Physics Letters, 1995
- Two-layer organic photovoltaic cellApplied Physics Letters, 1986
- Vat Dyes of Acenaphthene Series. IV. Condensation of Perylenetetracarboxylic Acid Anhydride with o-PhenylenediamineBulletin of the Chemical Society of Japan, 1952