Abstract
A new kind of Yb3+/Tm3+ co-doped blue-emitting borosilicate glass was prepared by melting and quenching process. The Judd–Ofelt intensity parameters were calculated and discussed according to the recorded absorption spectrum. Strong blue upconversion emissions originated from the 1G4→3H6 transition of Tm3+ were observed under 980nm excitation. It is suggested that the conversion of blue radiation is dominated by a three-photon absorption process. The optimized concentration of Yb3+ and Tm3+ was determined to be 0.6mol% and 0.075mol% based on the emission performance. The energy transfer process from Yb3+ to Tm3+ was analyzed and the energy transfer efficiency can reach up to 68%. The enhanced blue upconversion emission indicates that the Yb3+/Tm3+ co-doped borosilicate glass can be potential for applications of displays and blue lasers.
Published Version
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