首页|Photoluminescence and energy transfer investigations in Gd3+-Dy(3+)co-doped borate glasses
Photoluminescence and energy transfer investigations in Gd3+-Dy(3+)co-doped borate glasses
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NSTL
Elsevier
We study energy transfer, Photo and X-ray luminescence in lithium barium borate glasses doped with Gd and Dy. We find that the Dy3+ luminescence at 575-nm emission wavelength increases while the Gd3+ emission at lambda em = 312 nm decreases, attributed to the energy transfer (ET) from the 6P7/2 state of Gd3+ ions to the 4F9/2 state of Dy3+ ions. From the 6P7/2 state decay lifetime (lambda exc = 275 nm and lambda em = 312 nm) of Gd3+ and that of the 4F9/2 state (lambda exc = 382 nm and lambda em = 575 nm) of the Dy3+, we compute the key parameters such as ET efficiencies, transfer probabilities and average donor-acceptor distance. Photometric parameters of the developed samples at lambda exc = 275 nm are calculated. Suggested by the Commission International deI'Eclairage coordinates, we infer that at 275-nm excitation, our optimized sample, LGBaB1.5Dy, produces white light. Measured from X-ray luminescence, the integral scintillation efficiency of LGBaB1.5Dy is 11%.
LuminescenceEnergy transfer efficiencyEnergy transfer probabilityIntegral scintillation efficiencyLUMINESCENCE PROPERTIESDOPED BORATEQUANTUM EFFICIENCYDY3+LITHIUMLASERGD3+MECHANISMEMISSIONOXIDE
Ullah, I.、Zaman, F.、Rooh, G.、Khattak, S. A.、Khan, I.、Shoaib, M.、Kaewkhao, J.、Wabaidur, S. M.、Islam, Md A.
NSTL
Elsevier
