Development of materials for a luminescent solar collector. Final report, September 1, 1979-December 31, 1982
The optical absorption and fluorescence have been characterized for a broad range of vitreous and ceramic transparent inorganic materials doped with trivalent chromium ion. The aim was to identify a Cr/sup 3 +/ host which is susceptible to economical mass production and which could simultaneously satisfy the stringent long-term stability and spectroscopic requirements of the luminescent solar collector. Completely vitreous materials were found to be deficient because of unacceptably low Cr/sup 3 +/ fluorescence quantum yields which could not be circumvented by radiationless energy transfer to a lanthanide ion. In order to overcome this problem of low quantum yield, a new class of luminescent solid based on transparent glass ceramic technology had to be developed. In particular, transparent glass ceramics which precipitate the crystalline aluminosilicate mullite were found to be excellent hosts for Cr/sup 3 +/ which have quantum yields of at least 50 +- 10%. Currently, these mullite ceramics are by far the most advanced wholly inorganic material developed for the collector application and represent the first example of a new type of luminescent solid which can be extended to include many other crystalline ceramics and transition metal ions.
- Research Organization:
- GTE Labs., Inc., Waltham, MA (USA)
- DOE Contract Number:
- AC02-78ER04996
- OSTI ID:
- 5892230
- Report Number(s):
- DOE/ER/04996-4; ON: DE83015026
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140501 -- Solar Energy Conversion-- Photovoltaic Conversion
141000* -- Solar Collectors & Concentrators
ABSORPTION SPECTRA
CERAMICS
CHARGED PARTICLES
CHROMIUM IONS
DOPED MATERIALS
EQUIPMENT
GLASS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IONS
LUMINESCENT CONCENTRATORS
MATERIALS
MINERALS
MULLITE
OXIDE MINERALS
SOLAR CONCENTRATORS
SOLAR EQUIPMENT
SPECTRA