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Effects of nanostructure on optoelectronic properties of β phase polyoctylfluorene thin film
- Source :
-
Journal of Luminescence . Jul2011, Vol. 131 Issue 7, p1393-1396. 4p. - Publication Year :
- 2011
-
Abstract
- Abstract: β phase polyoctylfluorene thin films were obtained by exposure to toluene vapor for various annealing times or dipping into a THF/methanol mixture. The photoluminescence and electroluminescence of PFO thin films decrease with increasing annealing time. Grazing incident X-ray diffraction of the thin films indicates that more and larger β phase crystallites will be generated in thin film exposed for longer time, which will lead to more defects that reduce photoluminescence and electroluminescence. By analyzing the mechanism of formation of β phase, we assume that the defects mainly come from the formation of out-of-plane crystalline structure. The assumption is confirmed by higher photoluminescence of β phase polyoctylfluorene thin film achieved by dipping into a THF/methanol mixture that has less out-of-plane crystalline structure. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 131
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 60162783
- Full Text :
- https://doi.org/10.1016/j.jlumin.2011.03.035