1. Universität Karlsruhe (TH) 1 Photovoltaics. Lecture 6. CIGS. From previous lecture: Contacts resistance and recombination. TOM TIEDJE et al., IEEE TRANS. ON EL. DEVICES, VOL. ED-31, NO. 5, MAY 1984 Thickness dependant efficiency. Useful recombination limits.

2. Universität Karlsruhe (TH) 2 Photovoltaics. Lecture 6. CIGS. Few words on amorphous Si: Semi-direct band gap, with exponential edges. Absorption up to 2.5 times higher than in crystalline Si. Hydrogen improves properties.

3. Universität Karlsruhe (TH) 3 Photovoltaics. Lecture 6. CIGS. Few words on amorphous Si: 1.7eV 1.1eV Staebler-Wronski Effect: Significant decline in the efficiency of a-Si:H solar cells during first few hundred hours of illumination

4. Universität Karlsruhe (TH) 4 Photovoltaics. Lecture 6. CIGS. Cu(In x,Ga 1-x )Se 2 (CIGS) solar cells:

5. Universität Karlsruhe (TH) 5 Photovoltaics. Lecture 6. CIGS. Solar cells industry: H.S. Ullal and B. von Roedern, NREL/CP-520- 42058, September 2007

6. Universität Karlsruhe (TH) 6 Photovoltaics. Lecture 6. CIGS. Cu(In x,Ga 1-x )Se 2 (CIGS): C  -phase CuIn 3 Se 5 R. Herberholz et al.,Euro. Phys. J. AP 6, 131 (1999)

7. Universität Karlsruhe (TH) 7 Photovoltaics. Lecture 6. CIGS. Cu(In x,Ga 1-x )Se 2 (CIGS): E (x)[eV] = 1,02 +0,67x + 0,11x(x-1)

8. Universität Karlsruhe (TH) 8 Photovoltaics. Lecture 6. CIGS. Cu(In x,Ga 1-x )Se 2 (CIGS):

9. Universität Karlsruhe (TH) 9 Photovoltaics. Lecture 6. CIGS. Cu(In x,Ga 1-x )Se 2 (CIGS):

10. Universität Karlsruhe (TH) 10 Photovoltaics. Lecture 6. CIGS. Cu(In x,Ga 1-x )Se 2 (CIGS):