Ultrafast photoluminescence spectroscopy of exciton-exciton annihilation in oligoaniline films with nanoscale ordering
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en
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Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2006, vol. 74, p. 075202
American Physical Society
Resumen en inglés
The exciton dynamics and optical characteristics of blue-emitting N,N'-diphenyl-1,4-phenylene-diamine oligoaniline films have been determined. Transient photoluminescence experiments are consistent with internal quantum ...Leer más >
The exciton dynamics and optical characteristics of blue-emitting N,N'-diphenyl-1,4-phenylene-diamine oligoaniline films have been determined. Transient photoluminescence experiments are consistent with internal quantum yields of 5.3% and 10.1% measured for oriented and nonoriented films, respectively. The data indicate a drastic dependence on nanoscale ordering which promotes photoluminescence quenching, a large annihilation rate, and fast exciton diffusion. Therefore, the emission properties can be controlled by the textural morphologies of the layers.< Leer menos
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