On the function of a bathocuproine buffer layer in organic photovoltaic cells
- 16 October 2006
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 89 (16) , 163501
- https://doi.org/10.1063/1.2362624
Abstract
The role of bathocuproine (BCP) buffer layer inserted between active layer and Al contact in photovoltaic cells based on phthalocyanine (Pc) and C 60 was investigated. Photoluminescence(PL) experiments show exciton quenching at the C 60 – Al interface to be strongly reduced by inserting BCP. Current-voltage characteristics of photovoltaic cells with planar geometry front electrode/ Pc ∕ C 60 ∕ BCP ∕ Al show that BCP dramatically improves electron transport out of the C 60 film into the Al electrode. The tenfold increase in power conversion efficiency ( η ) with BCP can mostly be attributed to the latter effect. BCP does not improve η in photovoltaic cells with blend film geometry front electrode/ Pc : C 60 ∕ Al .Keywords
This publication has 15 references indexed in Scilit:
- Monolayer passivation of the transparent electrode in organic solar cellsThin Solid Films, 2005
- Influence of molecular architecture and intermixing on the photovoltaic, morphological and spectroscopic properties of CuPc–C60 heterojunctionsSolar Energy Materials and Solar Cells, 2004
- Very-high-efficiency double-heterostructure copper phthalocyanine/C60 photovoltaic cellsApplied Physics Letters, 2001
- Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic diodesApplied Physics Letters, 2000
- Built-in field electroabsorption spectroscopy of polymer light-emitting diodes incorporating a doped poly(3,4-ethylene dioxythiophene) hole injection layerApplied Physics Letters, 1999
- Improved energy transfer in electrophosphorescent devicesApplied Physics Letters, 1999
- An optical study on vapour, microcrystal beam and filmJournal of Physics: Condensed Matter, 1998
- Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrodeApplied Physics Letters, 1997
- Optical spectra and photoluminescence of C60 thin filmsSolid State Communications, 1996
- Comments on the classical theory of energy transferThe Journal of Chemical Physics, 1975