A narrowband-ultraviolet B(NB-UVB)-emitting Y2O3:Gd3+ phosphor powder-based xenon excimer lamp was evaluated for phototherapy. Powder was produced by annealing the host yttrium oxide and the dopant gadolinium oxide over a long time. After preparing a ...
A narrowband-ultraviolet B(NB-UVB)-emitting Y2O3:Gd3+ phosphor powder-based xenon excimer lamp was evaluated for phototherapy. Powder was produced by annealing the host yttrium oxide and the dopant gadolinium oxide over a long time. After preparing a binder and coating the inside of the quartz tube, one end was blocked to make the inside vacuum. Then, the xenon gas was filled with 600 Torr and sealed. A voltage of a frequency of 20 kHz and 10 kHz was applied to the lamp to discharge the discharge, and the glow was emitted with a dominant peak at xenon. Vacuum UV excited the inner-coated Y2O3:Gd3+ powder to emit NB-UVB.