Author/Authors :
Zhang، نويسنده , , Qiang and Chen، نويسنده , , Guorong and Dong، نويسنده , , Guoping and Zhang، نويسنده , , Guang and Liu، نويسنده , , Xiaofeng and Qiu، نويسنده , , Jianrong and Zhou، نويسنده , , Qinling and Chen، نويسنده , , Qingxi and Chen، نويسنده , , Danping، نويسنده ,
Abstract :
Cu-doped and Cu/Al-codoped high silica glasses (HSGes) are prepared by doping Cu2+ ions or codoping Cu2+ ions and Al3+ ions in porous glasses and then sintering at 1200 °C in air and the reduction of Cu2+ ions is observed in Cu/Al-codoped HSGes. With increasing the Al/Cu molar ratio, the color of the samples changes from brown to colorless gradually. Strong and broad glaucous emission from the monomer and dimmer Cu+ ions are observed when exciting the colorless samples with ultraviolet light. Absorption, photoluminescence, electron spin resonance (ESR) spectra and X-ray photoelectron spectroscopy (XPS) are carried out to investigate this phenomenon. The mechanism of this change is presented.
