Enhanced ultraviolet emission from hybrid structures of single-walled carbon nanotubes/ZnO films

Sung Kim; Dong Hee Shin; Chang Oh Kim; Sung Won Hwang; Suk-Ho Choi; Seungmuk Ji; Ja-Yong Koo
May 2009
Applied Physics Letters;5/25/2009, Vol. 94 Issue 21, p213113
Academic Journal
We report interesting observation of strong enhancement of ultraviolet luminescence from hybrid structures of single-walled carbon nanotubes (SWNTs)/ZnO. SWNTs of 3–120 nm thickness (t) were deposited on top of 100 nm ZnO films/n-type Si (100) wafer by spin coating and vacuum filtration to form the hybrid structures. Photoluminescence (PL) intensity of the hybrid structures increases with increasing t up to 10 nm, becomes almost ten times larger at t=10 nm than that of the bare ZnO film and decreases with increasing t above 10 nm. This strong PL enhancement is also confirmed by PL mapping. These findings are discussed based on the surface-plasmon-mediated emission mechanism.


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