Title :
Over 35% efficient GaAs/GaSb stacked concentrator cell assemblies for terrestrial applications
Author :
Fraas, L. ; Avery, J. ; Sundaram, V. ; Dinh, V. ; Davenport, T. ; Yerkes, J. ; Gee, J. ; Emery, K.
Author_Institution :
Boeing High Technol. Center, Seattle, WA, USA
Abstract :
It has been previously noted that GaSb infrared-sensitive cells can be stacked behind transparent GaAs cells to boost solar cell energy conversion efficiencies to well over 30% for space and terrestrial applications. Verified spectral response and current versus voltage data for both GaAs and GaSb cells along with Sandia National Laboratories clear-day solar spectral data for Albuquerque, US, are used to calculate the stack performance for various spring, summer, fall, and winter days in Albuquerque at both 25°C and at projected cell normal operating temperatures (NOT). It is found that the stack annual average energy conversion efficiency is 35.6% at 25°C and 32.5% at NOT. During the year, the tandem stack efficiency at 25°C varies by a small amount, from a low of 35.3% to a high of 35.8%
Keywords :
III-V semiconductors; gallium arsenide; gallium compounds; solar cells; solar energy concentrators; 35 percent; Albuquerque; GaAs-GaSb stacked concentrator solar cell; Sandia National Laboratories; US; clear-day solar spectral data; current versus voltage; normal operating temperatures; spectral response; terrestrial applications; Adders; Assembly; Costs; Energy conversion; Gallium arsenide; Integrated circuit interconnections; Photovoltaic cells; Solar energy; Temperature; Voltage;
Conference_Titel :
Photovoltaic Specialists Conference, 1990., Conference Record of the Twenty First IEEE
Conference_Location :
Kissimmee, FL
DOI :
10.1109/PVSC.1990.111616
