Dilute nitride GaInNAs and GaInNAsSb for solar cell applications

Siew Li Tan; Wai Mun Soong; Matthew J. Steer; Shiyong Zhang; Jo Shien Ng; John P. R. David

doi:10.1117/12.910349

21 February 2012 Dilute nitride GaInNAs and GaInNAsSb for solar cell applications

Siew Li Tan, Wai Mun Soong, Matthew J. Steer, Shiyong Zhang, Jo Shien Ng, John P. R. David

Author Affiliations +

Proceedings Volume 8256, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices; 82561E (2012) https://doi.org/10.1117/12.910349
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

The dilute nitride GaInNAs(Sb) alloy system is challenging to grow and defects can cause short diffusion lengths and high background doping densities. Despite these difficulties, extremely high cell efficiencies have recently been achieved in multi-junction solar cells utilising 1 eV GaInNAs absorber layers. This study aims to highlight the tradeoffs between the electrical and optical characteristics related to the performance of GaInNAs(Sb) diode structures grown by molecular beam epitaxy , with band gaps ranging from 0.90 to 1.04 eV. Post-growth annealing was necessary in some instances to reduce the background doping and dark current densities. The incorporation of Sb into GaInNAs has enabled the possibility of producing a dilute nitride cell with a band gap lower than 0.80 eV, although with an increased dark current.

Citation Download Citation

Siew Li Tan, Wai Mun Soong, Matthew J. Steer, Shiyong Zhang, Jo Shien Ng, and John P. R. David "Dilute nitride GaInNAs and GaInNAsSb for solar cell applications", Proc. SPIE 8256, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices, 82561E (21 February 2012); https://doi.org/10.1117/12.910349

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