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Materials Science PV PowerPoint PPT Presentation


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Materials Science PV. Enn Mellikov. Solar cell. Polycrystalline Si. Tecturing of surface. Thin film solar cell.

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Materials Science PV

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Materials science pv

Materials Science PV

Enn Mellikov


Solar cell

Solar cell


Polycrystalline si

Polycrystalline Si


Tecturing of surface

Tecturing of surface


Thin film solar cell

Thin film solar cell


Materials science pv

Cu(InGa)Se2-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)Se2 at both the cell and the module levels.


Cross section of a cu lnga se 2 solar cell

Cross section of a Cu(lnGa)Se2 solar cell


Materials science pv

The unit cell of the chalcopyrite lattice structure


Materials science pv

Ternary phase diagram f the Cu-In-Se system


Materials science pv

Pseudobinary In2Se3-Cu2Se phase diagram


Materials science pv

Defect levels in CuInSe2

Electronic levels of intrinsic defects in CuInSe2. 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.


Materials science pv

Multisource elemental coevaporation camera


Materials science pv

Relative metal fluxes and substrate temperature for different coevaporation processes stivity


Materials science pv

Chemical bath deposition


Materials science pv

Chemical bath deposition

Deposition of CdS buffer layers on Cu(InGa)Se2 is generally made in an alkaline aqueous solution (pH> 9) of the following three constituents:

1. a cadmium salt; for example, CdS04, CdCl2, CdI2, Cd(CH3COO)2

2. a complexing agent; commonly NH3 (ammonia)

3. a sulphur precursor; commonly SC(NH2)2 (thiourea).


Materials science pv

Choise of buffer layer materials

The lattice spacing of the (112) planes of CuIn1-xGaxSe2 and the (111) cubic or the (002) bexagonal planes of Cd1-xZnxS


Materials science pv

Alternative buffer layers


Materials science pv

SC parameters


Materials science pv

SC parameters


Materials science pv

Adsorbtsion of light

Absorption of light with different wavelenghts in Cu(InGa)Se2 with x=0.2


Band diagram of a zno cds cu inga se 2 device at 0 v in the dark

Band diagram of a ZnO/CdS/Cu(InGa)Se2 device at 0 V in the dark


Materials science pv

Parameters of Solar cells


Materials science pv

Parameters of solar cells

Efficiency ( ) and Voc (•) as a function of Cu(InGa)Se2 band gap, varied by increasing the relative Ga content, The dashed line has slope ΔVoc/ ΔEg = 1


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