Title :
Mathematical optimization of photovoltaic converters for diode lasers
Author :
Walker, Gilbert H. ; Heinbockel, John H.
Author_Institution :
NASA Langley Res. Center, Hampton, VA, USA
Abstract :
The mathematical optimization of vertical-junction photovoltaic converters for use with diode laser arrays supplying powers of up to 1 MW is discussed. Photovoltaic parameters were optimized using a mathematical model. The optimized converters have 500 single junctions connected in series. The efficiency varies from 41% for a 0.73 μm diode laser to 46% for a 0.83 μm diode laser. The optimum width of the single-junction converter is small, 3.0 μm, in order for the p-n junction to be within a diffusion length of the light-generated carriers. Another critical parameter is the series resistance; the optimum value of 1×10-3 Ω should be achievable. Another critical parameter is the donor carrier concentration, for which an optimum value of 5×1015 carriers/cm3 has been chosen
Keywords :
laser beam applications; optimisation; power transmission; solar cell arrays; space vehicle power plants; 0.73 micron; 0.83 micron; 41 percent; 46 percent; PV arrays; diode laser arrays; donor carrier concentration; efficiency; mathematical model; optimization; p-n junction; power transmission; series resistance; space power; Diode lasers; Laser beams; Laser modes; Photonic band gap; Photovoltaic systems; Power lasers; Semiconductor laser arrays; Semiconductor lasers; Solar power generation; Space missions;
Conference_Titel :
Energy Conversion Engineering Conference, 1989. IECEC-89., Proceedings of the 24th Intersociety
Conference_Location :
Washington, DC
DOI :
10.1109/IECEC.1989.74512
