Effects of cathode buffer layers on the efficiency of bulk-heterojunction solar cells
Journal
Applied Physics Letters
Journal Volume
96
Journal Issue
26
Pages
263506-1 - 263506-3
Date Issued
2010
Author(s)
Chang, C.-C.
Lin, C.-F.
Chiou, J.-M.
Ho, T.-H.
Tai, Y.
Chen Y.-F.
Chen, K.-H.
Abstract
The effects of cathode buffer layers on the bulk-heterojunction solar cells are investigated. Comparing with the device without buffer layer, obvious enhancements of Voc from 0.38 to 0.65 V and fill factor from 44% to 63% have been achieved by using 2 nm bathocuproine layer, which make the efficiency of the devices improved from 1.63% to 4.11%. Alternatively, lithium fluoride and/or tris(8-hydroxyquinolinato) aluminum were also introduced for clarification purpose. X-ray photoelectron spectroscopy study indicates that the degradation caused by the outer diffusion of carbon from active layers plays a crucial role in the device performance. © 2010 American Institute of Physics.
SDGs
Other Subjects
Active Layer; Bathocuproine; Bulk heterojunction; Device performance; Fill factor; Lithium fluoride; X-ray photoelectron spectroscopy studies; Epitaxial layers; Heterojunctions; Lithium; Optical waveguides; Photodegradation; Solar cells; X ray photoelectron spectroscopy; Buffer layers
Publisher
American Institute of Physics
Type
journal article