Efforts worldwide to find viable thermoelectrics (TE) are intensifying . One need exists to develop high-temperature TE materials which can utilize the un-utilized heat in thermal power plants, steelworks, factories, incinerators, and also conversion of focused solar energy. I will present recent developments in promising systems we have discovered in borides, silicides, oxides, and nitrides. A striking enhancement of ZT ~40 times was discovered for the samarium phase of RB66 which is the first actual PGEC (phonon glass electron crystal) ever reported by Slack, and which has created a renaissance of interest in this supposedly well-known system . Calculations in layered nitrides have revealed superior properties to oxides , and prospectives for routine synthesis will be given.
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