Spin coating technique has been applied in this work to prepared Xerogel films doped with three laser dyes (RhodaminesR101, 6G and Coumarin 153). The solid host of laser dye modifies its spectroscopic properties with respect to the liquid host.
During the spin coating process the dye molecules suffer due to variations in their environment. The effects of three parameters, the spinning speed, multilayer coating and formaldehyde addition are studied here