Modelling of Lattice Matched Dilute Nitride 4-junction Concentrator Solar Cells on Ge Substrates.
- Resource Type
- Article
- Authors
- Ochoa, Mario; García, Iván; Lombardero, Iván; Ayllón, Luna; Rey-Stolle, Ignacio; Algora, Carlos; Johnson, Andrew; Davies, J. Iwan; Kian Hua Tan; Wan Khai Loke; Wicaksono, Satrio; Soon Fatt Yoon; Ochoa-Martínez, Efraín; Gabás, Mercedes
- Source
- AIP Conference Proceedings. 2016, Vol. 1766 Issue 1, p1-7. 7p. 2 Charts, 4 Graphs.
- Subject
- *SOLAR cells
*COMPUTER-aided design
*EFFICIENCY of solar concentrators
*CRYSTAL lattices
*NITRIDES
*SEMICONDUCTOR junctions
- Language
- ISSN
- 0094-243X
Technology Computer Aided Design modeling is used to examine the performance under light concentration of a 4-J solar cell Ge-based that includes a 1-eV MBE-grown dilute nitride subcell. The 1-eV solar cell is modeled and examined by using material parameters extracted from detailed electro-optical characterization prior to be included into a multijunction structure. The modelling reveals the impact of the electric field-assisted collection in the performance of single junction solar cells and its effect when included in a 4-Junction solar cells. This effect is responsible for the lower FF (~15% lower) in the 4J when including the dilute nitride subcell, especially if it limits the photocurrent. Finally, an optimization procedure based on dilute nitrides with higher material quality is performed resulting in a 4-Junction solar cell with an efficiency of 47% for concentrations between 1000-2000 suns direct terrestrial spectrum. [ABSTRACT FROM AUTHOR]