uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Development of Cu(In,Ga)Se-2 superstrate devices with alternative buffer layers
Univ Delaware, Inst Energy Convers, 451 Wyoming Rd, Newark, DE 19716 USA.;Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics. Univ Delaware, Inst Energy Convers, 451 Wyoming Rd, Newark, DE 19716 USA..
Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA..
Univ Delaware, Inst Energy Convers, 451 Wyoming Rd, Newark, DE 19716 USA.;Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA..
2016 (English)In: Solar Energy Materials and Solar Cells, ISSN 0927-0248, E-ISSN 1879-3398, Vol. 157, 85-92 p.Article in journal (Refereed) Published
Abstract [en]

Superstrate Cu(ln,Ga)Se-2 (CIGS) solar cells are prepared in the structure SLG/TCO/buffer/CIGS/Au with CIGS deposited onto the buffer layer by a single stage co-evaporation process. Three buffer materials - CdS deposited by chemical surface deposition, ZnSe and ZnO by RF magnetron sputtering - are tested in the superstrate structure. The best cell achieves 8.6% efficiency with the ZnO buffer after light soaking and forward bias treatments. The efficiency of devices with CdS or ZnSe buffers are less than 4%. The junction formation between the absorber and buffer layers are investigated by x-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. For CdS/CIGS and ZnSe/CIGS superstrate devices extensive inter-diffusion between the absorber and buffer layer under CIGS growth condition is the critical problem. For ZnO/CIGS superstrate cells GaxOy formation at the junction interface and unfavorable conduction band alignment are the main factors that limit the device performance.

Place, publisher, year, edition, pages
2016. Vol. 157, 85-92 p.
Keyword [en]
CIGS, Solar cell, Thin film, Superstrate, Alternative buffer, Interface
National Category
Materials Engineering Environmental Engineering
Identifiers
URN: urn:nbn:se:uu:diva-306233DOI: 10.1016/j.solmat.2016.05.018ISI: 000384391700012OAI: oai:DiVA.org:uu-306233DiVA: diva2:1040363
Available from: 2016-10-27 Created: 2016-10-26 Last updated: 2016-10-27Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Larsen, Jes K.
By organisation
Solid State Electronics
In the same journal
Solar Energy Materials and Solar Cells
Materials EngineeringEnvironmental Engineering

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 38 hits
ReferencesLink to record
Permanent link

Direct link