Preparation and Comparison of the Photoelectronic Properties of Sr2Nb207 and Ba0.5Sr0.5Nb2O6.
BROWN UNIV PROVIDENCE RI DEPT OF CHEMISTRY
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The two alkaline earth niobates Sr2Nb2O7 and Ba0.5Sr0.5NbO6 have been prepared, their electronic properties measured, and their photoresponses compared. The indirect band gap in Sr2Nb2O7 is 3.86 eV compared with 3.38 eV for Ba0.5Sr0.5Nb2O6. Hence, photoanodes composed of Sr2Nb2O7 respond to much less of the white light spectrum than those made from Ba05Sr0.5Nb2O6. Nevertheless, their electrical outputs at an anode potential of 0.8 eV with respect to SCE in 0.2 M sodium acetate under white xenon arc irradiation of 1.25 Wcm2 are comparable. Author
- Solid State Physics