Enhancement of thermoelectric figure-of-merit by resonant states of aluminium doping in lead selenide

02 engineering and technology 0210 nano-technology 7. Clean energy
DOI: 10.1039/c1ee02465e Publication Date: 2011-11-11T13:30:46Z
ABSTRACT
By adding aluminium (Al) into lead selenide (PbSe), we successfully prepared n-type PbSe thermoelectric materials with a figure-of-merit (ZT) of 1.3 at 850 K. Such a high ZT is achieved by a combination of high Seebeck coefficient caused by very possibly the resonant states in the conduction band created by Al dopant and low thermal conductivity from nanosized phonon scattering centers.
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