Spectral properties of organic chromophores in fluorophosphate glasses

Rhodamine 6G, Alq(3), quinacridone (QAD) doped lead tin fluorophosphate gla ss samples (62.3SnF(2), 10.8SnO, 9.5PbF(2), 17.4P(2)O(5) wt%) were prepared . Glass samples were melted at 320 degrees C in an electric furnace in a py rex crucible, then were transferred to a Teflon crucible in another furnace at 280 degrees C. The glass transition temperature, crystallization temper ature, melting temperature, refractive index, and chemical durability in wa ter were measured. The absorption spectra and emission spectra of organic c hromophores in these samples were measured. The absorption peak shifts from 537.2(+/-0.2) to 535.8(+/-0.2) nm and the emission peak shifts from 585.0( +/-0.5) to 589.0(+/-0.5) when the melting time of Rhodamine 6G increased fr om 15 to 60 min. The energy transfer from Alq(3) to QAD and Rhodamine 6G we re investigated by excitation spectra analysis. The results showed that the energy absorbed by Alq(3) from 350 to 450 nm was transferred to QAD, which is important for active devices. (C) 2000 Published by Elsevier Science B. V. All rights reserved.