High-efficiency solar-thermophotovoltaic system equipped with a monolithic planar selective absorber/emitter

Abstract. We demonstrate a high-efficiency solar-thermophotovoltaic system (STPV) using a monolithic, planar, and spectrally selective absorber/emitter. A complete STPV system using gallium antimonide (GaSb) cells was designed and fabricated to conduct power generation tests. To produce a high-efficiency STPV, it is important to match the thermal radiation spectrum with the sensitive region of the GaSb cells. Therefore, to reach high temperatures with low incident power, a planar absorber/emitter is incorporated for controlling the thermal radiation spectrum. This multilayer coating consists of thin-film tungsten sandwiched by yttria-stabilized zirconia. The system efficiency is estimated to be 16% when accounting for the optical properties of the fabricated absorber/emitter. Power generation tests using a high-concentration solar simulator show that the absorber/emitter temperature peaks at 1640 K with an incident power density of 45  W/cm2, which can be easily obtained by low-cost optics such as Fresnel lenses. The conversion efficiency became 23%, exceeding the Shockley–Queisser limit for GaSb, with a bandgap of 0.67 eV. Furthermore, a total system efficiency of 8% was obtained with the view factor between the emitter and the cell assumed to be 1.

[1]  Carlos Algora,et al.  Development and experimental evaluation of a complete solar thermophotovoltaic system , 2012 .

[2]  H. Queisser,et al.  Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells , 1961 .

[3]  Shigenao Maruyama,et al.  Selective Emission of Al2O3/Er3Al5O12 Eutectic Composite for Thermophotovoltaic Generation of Electricity , 2000 .

[4]  W. Ruppel,et al.  Interference filters for thermophotovoltaic solar energy conversion , 1983 .

[5]  V. S. Sundaram,et al.  Fundamental characterization studies of GaSb solar cells , 1991, The Conference Record of the Twenty-Second IEEE Photovoltaic Specialists Conference - 1991.

[6]  David M. Bierman,et al.  A nanophotonic solar thermophotovoltaic device. , 2014, Nature nanotechnology.

[7]  Antonio Luque,et al.  Handbook of photovoltaic science and engineering , 2011 .

[8]  R. Bell,et al.  Concentration ratio and efficiency in thermophotovoltaics , 1979 .

[9]  R.M. Swanson,et al.  A proposed thermophotovoltaic solar energy conversion system , 1979, Proceedings of the IEEE.

[10]  Hohyun Lee,et al.  Design of a high temperature cavity receiver for residential scale concentrated solar power , 2012 .

[11]  Michael W. Edenburn.  Analytical evaluation of a solar thermophotovoltaic (TPV) converter , 1979 .

[12]  V. M. Andreev,et al.  TPV Systems with Solar Powered Tungsten Emitters , 2007 .

[13]  Thomas K. Gaylord,et al.  Rigorous coupled-wave analysis of metallic surface-relief gratings , 1986 .

[14]  F. Demichelis,et al.  A solar thermophotovoltaic converter , 1980 .

[15]  Carlos Algora,et al.  Detailed balance analysis of solar thermophotovoltaic systems made up of single junction photovoltaic cells and broadband thermal emitters , 2010 .

[16]  W. Spirkl,et al.  Solar thermophotovoltaics: An assessment , 1985 .

[17]  W. Ruppel,et al.  Selective emitters for thermophotovoltaic solar energy conversion , 1983 .