1. Materials Science PV Enn Mellikov

2. Solar cell

3. Polycrystalline Si

4. Tecturing of surface

5. Thin film solar cell

6. Cu(InGa)Se 2 -based solar cells have often been touted as being among the most promising of solar cell technologies for cost-effective power generation. This is partly due to the advantages of thin films for low-cost, high-rate semiconductor deposition over large areas using layers only a few microns thick and for fabrication of monolithically interconnected modules. Perhaps more importantly, very high efficiencies have been demonstrated with Cu(InGa)Se 2 at both the cell and the module levels.

7. Cross section of a Cu(lnGa)Se 2 solar cell

8. The unit cell of the chalcopyrite lattice structure

9. Ternary phase diagram f the Cu-In-Se system

10. Pseudobinary In 2 Se 3 -Cu 2 Se phase diagram

11. Defect levels in CuInSe 2 Electronic levels of intrinsic defects in CuInSe 2. On the left side the theoretical values are presented and on the right side experimentally reported values are presented. The height of histogram columns on the right side represents the spread in experimental data.

12. Multisource elemental coevaporation camera

13. Relative metal fluxes and substrate temperature for different coevaporation processes stivity

14. Chemical bath deposition

15. Deposition of CdS buffer layers on Cu(InGa)Se 2 is generally made in an alkaline aqueous solution (pH> 9) of the following three constituents: 1. a cadmium salt; for example, CdS0 4, CdCl 2, CdI 2, Cd(CH 3 COO) 2 2. a complexing agent; commonly NH 3 (ammonia) 3. a sulphur precursor; commonly SC(NH 2 ) 2 (thiourea).

16. Choise of buffer layer materials The lattice spacing of the (112) planes of CuIn 1-x Ga x Se 2 and the (111) cubic or the (002) bexagonal planes of Cd 1-x Zn x S

17. Alternative buffer layers

18. SC parameters

20. Adsorbtsion of light Absorption of light with different wavelenghts in Cu(InGa)Se 2 with x=0.2

21. Band diagram of a ZnO/CdS/Cu(InGa)Se 2 device at 0 V in the dark

22. Parameters of Solar cells

23. Parameters of solar cells Efficiency ( ) and V oc () as a function of Cu(InGa)Se 2 band gap, varied by increasing the relative Ga content, The dashed line has slope ΔV oc / ΔE g = 1