Enhanced photoluminescence from self-organized rubrene single crystal surface structures

Stöhr, R. J.; Beirne, G. J.; Michler, P.; Scholz, R.; Wrachtrup, J.; Pflaum, J.
June 2010
Applied Physics Letters;6/7/2010, Vol. 96 Issue 23, p231902
Academic Journal
We report on crystalline pyramidal structures grown via self-organization on the rubrene (001) surface. The analysis of their spectral response by means of photoluminescence with micrometer lateral resolution reveals an intensity enhancement on-top of the surface structures. As we demonstrate this intensity increase can be related to the excitation processes at the molecular level in combination with exciton confinement within the pyramids.


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