Kim Byung-Jae, Mastro Michael A, Hite Jennifer, Eddy Charles R, Kim Jihyun
Department of Chemical & Biological Engineering, Korea University, Seoul 136-713, Korea.
Opt Express. 2010 Oct 25;18(22):23030-4. doi: 10.1364/OE.18.023030.
We report a graphene-based transparent conductive electrode for use in ultraviolet (UV) GaN light emitting diodes (LEDs). A few-layer graphene (FLG) layer was mechanically deposited. UV light at a peak wavelength of 368 nm was successfully emitted by the FLG layer as transparent contact to p-GaN. The emission of UV light through the thin graphene layer was brighter than through the thick graphene layer. The thickness of the graphene layer was characterized by micro-Raman spectroscopy. Our results indicate that this novel graphene-based transparent conductive electrode holds great promise for use in UV optoelectronics for which conventional ITO is less transparent than graphene.
我们报道了一种用于紫外（UV）氮化镓发光二极管（LED）的基于石墨烯的透明导电电极。通过机械沉积制备了几层石墨烯（FLG）层。作为与p型氮化镓的透明接触，FLG层成功发射出峰值波长为368nm的紫外光。通过薄石墨烯层发射的紫外光比通过厚石墨烯层发射的更亮。用显微拉曼光谱对石墨烯层的厚度进行了表征。我们的结果表明，这种新型的基于石墨烯的透明导电电极在紫外光电子学领域具有巨大的应用前景，因为对于该领域，传统的氧化铟锡（ITO）的透明度不如石墨烯。
