A study of the luminescence of Cr3+ in inorganic glasses was first undertaken in order to develop a Luminescent Solar Concentrator. Broad absorption bands and near IR (vibronic) emission made the material promising for the purpose but universally low quantum efficiency (in glasses) negated that goal. Having observed that efficiency in crystals can be high, a development of glass ceramics, or crystallites precipitated in situ in a glassy matrix was undertaken.

© 1985 Optical Society of America

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