Prospective for graphene based thermal mid-infrared light emitting devices
Prospective for graphene based thermal mid-infrared light emitting devices
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DOI：
10.1063/1.4894449
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发表时间：
2014-08-01
期刊：
影响因子：
1.6
通讯作者：
Nash, G. R.
中科院分区：
文献类型：
--
作者：
Lawton, L. M.;Mahlmeister, N. H.;Nash, G. R.
我们研究了大面积化学气相沉积（CVD）石墨烯转移到SiO2/Si上的中红外热发射的空间和光谱特性，并表明该发射大致是灰体发射器的发射，单层和多层石墨烯的发射率值约为2%和6%。对于可以持续100多个小时的电流，发射峰值在4 μ m左右的波长处，覆盖了许多重要气体的特征吸收。即使在高达100 kHz的频率下调制驱动电流，也可以获得可测量的热发射调制。(C)2014年作者。
We have investigated the spatial and spectral characteristics of mid-infrared thermal emission from large area Chemical Vapor Deposition (CVD) graphene, transferred onto SiO2/Si, and show that the emission is broadly that of a grey-body emitter, with emissivity values of approximately 2% and 6% for mono-and multilayer graphene. For the currents used, which could be sustained for over one hundred hours, the emission peaked at a wavelength of around 4 mu m and covered the characteristic absorption of many important gases. A measurable modulation of thermal emission was obtained even when the drive current was modulated at frequencies up to 100 kHz. (C) 2014 Author(s).