Reference : Photoelectrochemical Screening of Solar Cell Absorber Layers: Electron Transfer Kinet...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Physical, chemical, mathematical & earth Sciences : Physics
Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others
Physics and Materials Science
http://hdl.handle.net/10993/27036
Photoelectrochemical Screening of Solar Cell Absorber Layers: Electron Transfer Kinetics and Surface Stabilization
English
Colombara, Diego mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Dale, Phillip mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Kissling, Gabriela P. []
Peter, Laurence M. []
Tombolato, Sara mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
19-Apr-2016
Journal of Physical Chemistry C
American Chemical Society
Yes (verified by ORBilu)
1932-7447
1932-7455
Washington
DC
[en] Photoelectrochemistry ; Solar cell ; Photovoltaics ; Prediction ; Monitoring ; Passivation ; Recombination
[en] edox electrolyte contacts offer a simple way of testing the photocurrent generation/collection efficiency in partially completed thin-film solar cells without the need to complete the entire fabrication process. However, the development of a reliable quantitative method can be complicated by the instability of the semiconductor/electrolyte interface. In the case of Cu(In,Ga)Se2 (CIGSe) solar cells, these problems can be overcome by using samples that have undergone the next processing step in solar cell fabrication, which involves chemical bath deposition of a thin (ca. 50 nm) CdS buffer layer. The choice of redox system is also critical. The frequently used Eu3+/2+ redox couple is not suitable for reliable performance predictions since it suffers from very slow electron transfer kinetics. This leads to the buildup of photogenerated electrons near the interface, resulting in electron–hole recombination. This effect, which can be seen in the transient photocurrent response, has been quantified using intensity-modulated photocurrent spectroscopy (IMPS). The study has demonstrated that the more oxidizing Fe(CN)63–/4– redox system can be used when a CdS buffer layer is deposited on the CIGSe absorber. The wide bandgap CdS acts as a barrier to hole injection, preventing decomposition of the CIGSe and formation of surface recombination centers. The IMPS response of this system shows that there is no recombination; i.e., electron scavenging is very rapid. It is shown that measurements of the external quantum efficiency made using the Fe(CN)63–/4– redox couple with CdS-coated CIGSe layers can provide reliable predictions of the short-circuit currents of the complete solar cells. Similar results have been obtained using CdS-coated GaAs layers, suggesting that the new approach may be widely applicable.
European Commission - EC
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/27036
10.1021/acs.jpcc.5b12531
http://pubsdc3.acs.org/doi/full/10.1021/acs.jpcc.5b12531
FP7 ; 284486 - SCALENANO - Development and scale-up of nanostructured based materials and processes for low cost high efficiency chalcogenide based photovoltaics

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Limited access
Photoelectrochemical Screening of Solar Cell Absorber Layers - Electron Transfer Kinetics and Surface Stabilization.pdfPublisher postprint2.03 MBRequest a copy
Limited access
Photoelectrochemical Screening of Solar Cell Absorber Layers - Electron Transfer Kinetics and Surface Stabilization SI.pdfSupporting informationPublisher postprint401.97 kBRequest a copy

Bookmark and Share SFX Query

All documents in ORBilu are protected by a user license.