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刘治国
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期刊论文
Photoluminescence of pyrochlore phase in SrBi2Ta2O9 thin films
Appl. Phys. Lett., Vol. 83, No.4, 28 July 2003，-0001，（）：
SrBi2Ta2O9 thin films were prepared by pulsed laser deposition at different substrate temperatures. Photoluminescence (PL) has been detected at room temperature from the pyrochlore phase in the SrBi2Ta2O9 film deposited at 850℃. The PL shows five luminescence bands of 330, 365, 407, 490,and 600nm. And the PL excitation shows six excitation bands of 278, 330, 365, 407, 490, and 600nm. The one-to-one correspondence of PL and PL excitation spectra reveals a band-to-band excitation and a multienergy-gap structure in the pyrochlore phase in SrBi2Ta2O9 films.
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