J. Phys. IV France 125 (2005) 225-227
Determination of fluorescence quantum efficiency in solutions by thermal lens measurements at several wavelengths: Application to Rhodamine 6GC. Jacinto1, S.M. Lima2 and T. Catunda1
1 Universidade de São Paulo, Instituto de Física de São Carlos, CP 369, São Carlos, SP, Brazil
2 Universidade Estadual de Mato Grosso do Sul - UEMS, Grupo de Espectroscopia Óptica e Fototérmica, CP 351, Dourados, MS, Brazil
In this work the multi-wavelength thermal lens method is introduced as a valuable tool to measure the fluorescence quantum efficiency () of luminescent solutions. This methodology exhibits some advantages over conventional methods, like for instance no need to use a reference sample. The Rhodamine was firstly chosen for our study because its properties are very well known. Our results indicate a high value for Rhodamine (~ 100%).
© EDP Sciences 2005