Influence of the grid and cell design on the power output of thin film Cu(InGa)Se2 cells
article
The effect of the front contact characteristics on the working of monolithically integrated thin film solar panels and effective ways of improving the front contact are discussed. Efficiencies were calculated for various cell lengths and scribing areas in between cells (interconnection dead zone widths). The application of a metallic
grid was studied to enhance the front contact. Both the efficiency and the cell length can be increased considerably. The exact benefit depends on the cell configuration and dimensions. This work presents quantitative analysis of the effects of a wide array of variables, such as cell length, sheet resistance of the transparent conductive
oxide, interconnect dead zone, grid finger height, grid fingerwidth and grid finger spacing. In addition to the cell efficiency, the calculated JV-curves are also presented, which bring more detail for a correct interpretation of the trends observed. Furthermore, the efficiencieswere calculated using a set of ‘virtual’ transparent conductors with
a sheet resistance between 0.1 and 10 Ω/sq and a fixed transmittance of 89.8%. By comparing the efficiency of these transparent conductors with the results obtainedwhen using the fingers, the finger height can be translated to a virtual sheet resistance.
grid was studied to enhance the front contact. Both the efficiency and the cell length can be increased considerably. The exact benefit depends on the cell configuration and dimensions. This work presents quantitative analysis of the effects of a wide array of variables, such as cell length, sheet resistance of the transparent conductive
oxide, interconnect dead zone, grid finger height, grid fingerwidth and grid finger spacing. In addition to the cell efficiency, the calculated JV-curves are also presented, which bring more detail for a correct interpretation of the trends observed. Furthermore, the efficiencieswere calculated using a set of ‘virtual’ transparent conductors with
a sheet resistance between 0.1 and 10 Ω/sq and a fixed transmittance of 89.8%. By comparing the efficiency of these transparent conductors with the results obtainedwhen using the fingers, the finger height can be translated to a virtual sheet resistance.
TNO Identifier
529347
Source
Thin Solid Films(594), pp. 225-231.
Publisher
Elsevier
Pages
225-231
Files
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