Kr~(3+)-doped Polyether/siloxane Hybrid Materials for Optoelectronics

摘要

The sol-gel method was employed to obtain poly(oxyethylenc) (POE)/siloxane hybrids (di-ureasils) doped with erbium tril'late (ErtCFiSChh), The host hybrid matrix employed is composed of a siliceous framework to which short POE chains are covalently bonded through urea linkages (-NH(C(=O)NH-).Xerogels with ". > n > 5 (where n, salt composition, is the molar ratio of OCHjCHi moieties per Er1+ ion) were analyzed. Samples with n >20 are amorphous. Those with n > 20 are thermally stable up to about 325 °C. In the di-ureasils proposed, the Er1+ ions are active at room temperature (RT). Concentration effects on the quenching of the 1.53 mm emission intensity (excited at 488 nm) are negligible.