Thickness Dependent Behavior of Photoluminescence of Tris(8-hydroxyquinoline) Aluminum Film
Abstract: In situ thickness dependent photoluminescence (PL) measurements of tris(8-hydroxyquinoline) aluminum(Alq3) film were performed. At the beginning of Alq3 deposition on the glass substrate, the Alq3 emission showed a sharp red-shift. Further deposition of Alq3 resulted slight red-shift, and finally tended to saturated value. The total red-shift of about 12 nm was observed for the Alq3 film thickness range from 2 to 500 nm.This red-shift was attributed to the change from the 2D to 3D exciton state with increasing Alq3 film thickness. Meanwhile, the PL intensity of Alq3 emission increased continuously, and showed a rate change at the initial deposition of Alq3 due to non-rediative decay of excitons arised from the interaction between excitons and the substrate, and finally tended to saturation with the Alq3 thickness.
|Citation:||Yi-feng Xu, Han-jie Zhang, Qiao Chen, Hai-yang Li, Shi-ning Bao, Pi-mo He. Thickness Dependent Behavior of Photoluminescence of Tris(8-hydroxyquinoline) Aluminum Film[J]. Chinese Journal of Chemical Physics , 2006, 19(2): 152-154. doi: 10.1360/cjcp2006.19(2).152.3|