Solar cells, defects and recombination – news from CIGS
Feb 8, 2017
16:00 - 17:00
Prof. Dr. Susanne Siebentritt
Max-Planck-Institut für Eisenforschung GmbH, Seminar Room 1
Seminar Room 1
Dr. Baptiste Gault & Dr. Torsten Schwarz
After a short introduction to thin film solar cells, I will review what we know about defects in Cu(InGa)Se2 (CIGS), where we found significant differences between Cu-rich and Cu-poor material. By photoluminescence we recently found fundamental differences between pure CIS and Ga containing CIGS: with Ga the recombination is higher in Cu-rich material. And high Ga content CIGS shows a deep defect which gets more and more shallow when we decrease the Ga content. Finally, I will show that we can use photoluminescence to characterise the tails states in kesterite.