8 March 2014 Proposal for realizing high-efficiency III-nitride semiconductor tandem solar cells with InN/GaN superstructure magic alloys fabricated at raised temperature (SMART)
Author Affiliations +
Abstract
We propose a plausible and realistic idea for realizing high-efficiency III-nitride semiconductor tandem solar cells which utilize nearly entire AM-1.5 solar spectrum conversion under a subcell photocurrent matching rule. For the sake of drastic improvement/suppression of pn-junction leakage current, each subcell in the proposed tandem solar cells is composed of superstructure InN/GaN magic alloys, i.e. coherently grown (InN)m/(GaN)n short-period superlattices with simple integer pairs of (m, n) ≤ 4 in monolayers, which solve lattice-mismatch and immiscible problems in a conventional InGaN ternary alloy system. The InN/GaN magic alloys are further applicable to band engineering that provides potential wells for a thermal/photo sensitization effect and graded-bandgap structures for efficient carrier collection under the same (m, n) ratio alloys or keeping the coherent structure. Theoretical maximum conversion efficiency is 51% (58% under 250-suns concentration) for a 4-tandem cell configuration.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kazuhide Kusakabe, Akihiko Yoshikawa, "Proposal for realizing high-efficiency III-nitride semiconductor tandem solar cells with InN/GaN superstructure magic alloys fabricated at raised temperature (SMART)", Proc. SPIE 8986, Gallium Nitride Materials and Devices IX, 89861B (8 March 2014); doi: 10.1117/12.2042121; https://doi.org/10.1117/12.2042121
PROCEEDINGS
10 PAGES


SHARE
RELATED CONTENT

Design of wide bandgap (1.7 eV 1.9 eV) III V...
Proceedings of SPIE (February 16 2018)
A simple but accurate multiband solar cells model
Proceedings of SPIE (May 05 2008)
Minimizing shadow losses in III-nitride solar cells
Proceedings of SPIE (August 20 2009)
Simulation of the InGaN-based tandem solar cells
Proceedings of SPIE (September 10 2008)
Review of nitride infrared intersubband devices
Proceedings of SPIE (March 10 2010)

Back to Top