Title :
Solar thermophotovoltaic using Al2O3/Er3 Al5O12 eutectic composite selective emitter
Author :
Yugami, Hiroo ; Sai, Hitoshi ; Nakamura, Kazuya ; Nakagawa, Narihito ; Ohtsubo, Hideki
Author_Institution :
Graduate Sch. of Eng., Tohoku Univ., Sendai, Japan
Abstract :
Thermal emission properties of Al2O3/Er3Al5O12 eutectic composite are studied for the application of selective emitter of thermophotovoltaic (TPV) power generator. Since this material has a unique structure, high mechanical performance would be expected. Selective emission bands at wavelength 1.5 μm due to Er3+ ions are observed. Since these emission bands match up the sensitive region of GaSb PV cell, Al2O3/Er3Al5O12 eutectic composite is a suitable emitter material for TPV systems. Solar TPV system with a dish-type solar concentrator (diameter=1.56 m) has been made and tested using the selective emitter material. The performance and component temperature are studied for the system equipped with broad band SiC and Al2O3/Er3 Al5O12 eutectic composite selective emitters. Low thermal load for TPV optical components is confirmed for the selective emitter system. The improvement of fill factor of GaSb PV cells is also observed for selective emitter system
Keywords :
III-V semiconductors; aluminium compounds; composite materials; erbium compounds; gallium compounds; semiconductor device measurement; semiconductor device testing; solar cells; solar energy concentrators; thermophotovoltaic cells; 1.5 mum; 1.56 cm; Al2O3-Er3Al5O12 ; Al2O3/Er3Al5O12 eutectic composite selective emitter; GaSb; GaSb solar thermophotovoltaic cells; SiC; component temperature; dish-type solar concentrator; fill factor improvement; mechanical performance; performance; selective emission bands; solar TPV system; thermal emission properties; thermal load; Aerospace materials; Composite materials; Crystal microstructure; Erbium; Grain boundaries; Photovoltaic systems; Power generation; Solar power generation; Temperature; Thermal resistance;
Conference_Titel :
Photovoltaic Specialists Conference, 2000. Conference Record of the Twenty-Eighth IEEE
Conference_Location :
Anchorage, AK
Print_ISBN :
0-7803-5772-8
DOI :
10.1109/PVSC.2000.916107
