The Effect of Adsorbent Layer Thickness and Gallium Concentration on the Efficiency of a Dual-Junction Copper Indium Gallium Diselenide Solar Cell
- 4 Downloads
The split of the sunlight spectrum by the bandgap energy of multi-junction solar cells is a highly effective way to increase solar cell efficiency. The reason is that the energy of photons is effectively absorbed, and there is a reduction in solar cell loss. In this contribution, we report on the performance of a double-junction copper gallium diselenide/copper indium gallium diselenide (CGS/CIGS) solar cell with a cadmium sulfide (CdS) buffer layer simulator. The J–V characteristics and the external quantum efficiency were simulated under AM1.5 illumination. Increased efficiency was seen as a result of the change in the thickness of layers and different molar ratio amounts of gallium, and the optimal amount of each factor was obtained. In this study, a single CGS solar cell was used as the top cell and a single CIGS solar cell as the bottom cell in the tandem configuration, which showed conversion efficiencies of 16.175% and 15.696%, respectively. Finally, solar cell efficiency of 32.3% was obtained in the double-junction state, an increase of 6% compared with the reference cell.
KeywordsNumerical simulation four-terminal solar cell CGS/CIGS double-junction solar cells efficiency
Unable to display preview. Download preview PDF.
- 1.G.J. Lin, J. Bi, M. Song, J. Liu, W. Xiong, and M. Huang, in Optoelectronics—Advanced Materials and Devices, ed. By S.L. Pyshkin, J.M. Ballato, (Intech, 2013), p. 445.Google Scholar
- 2.N.V. Yastrebova, High-efficiency multi-junction solar cells: current status and future potential. (Centre for Research in Photonics, University of Ottawa, 2007). https://www.semanticscholar.org/paper/High-efficiency-multi-junction-solar-cells-%3A-status-Yastrebova/2a4dce1dd62aba60fb2fe2a8f3f11241b2f325a0. Accessed 9 October 2019.
- 9.S. Olyaee and F. Farhadipour, Opt. Appl. 48, 633 (2018).Google Scholar
- 21.M. Gloeckler, A. Fahrenbruch, and J. Sites, in 3rd World Conference on Photovoltaic Energy Conversion (2003), pp. 491–494.Google Scholar