Semitransparent (ST) Cu(In,Ga)Se2 (CIGSe) solar cells based on the ultrathin absorbers with a bandgap of ~1.5eV are prepared on the tin-doped indium oxide (ITO) back electrode. In a solar cell with absorber thickness ≤300nm, incorporation of a sulfurized-AgGa (AGS) layer between the CIGSe layer and the ITO back contact was found to improve the device efficiency. This article explores the effect of the AGS layer on the CIGSe structure and CIGSe/ITO interface. Meanwhile, an ordered defect compound formation is observed in the AGS interlayered-CIGSe absorbers, the origin of which is the decrease in the (Ag+Cu)/(Ga+In) ratio arising from diffusion of In from the ITO to the absorber and the Ag/Ga ratio of 0.60 in the AGS layer. It is found that the AGS layer can significantly reduce the formation of the GaOx phase at the CIGSe/ITO interface. However, the increase in the deposition time of the CIGSe layer in the AGS interlayered-absorbers resulted in an increase in the GaOx interfacial (IF) layer thickness. The roll-over phenomenon in the illuminated J-V curves of devices based on AGS interlayered-absorbers became increasingly pronounced when the thickness of GaOx IF layer increased. The SCAPS (solar cell capacitance simulator) simulation results indicate that the reason for the roll-over effect in the illuminated J-V curves of the solar cells with AGS layers is the GaOx IF phase (n-type in nature). In light of the present results, possibilities to further enhance the conversion efficiency of ST CIGSe solar cells are also discussed.
Solar Energy Materials and Solar Cells – Elsevier
Published: May 1, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera