Tuning the Electrical and Optical Properties of Graphene by Ozone Treatment for Patterning Monolithic Transparent Electrodes
Tuning the Electrical and Optical Properties of Graphene by Ozone Treatment for Patterning Monolithic Transparent Electrodes
复制标题
通过臭氧处理调节石墨烯的电学和光学性能以形成单片透明电极图案
DOI：
10.1021/nn400682u
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发表时间：
2013-05-01
期刊：
影响因子：
17.1
通讯作者：
Cheng, Hui-Ming
中科院分区：
文献类型：
--
作者：
Yuan, Jiangtan;Ma, Lai-Peng;Cheng, Hui-Ming
石墨烯的可调电学和光学性质对于促进其在各种设备中用作薄膜电极至关重要。我们开发了一种无蚀刻臭氧处理方法，通过简单地改变石墨烯暴露于臭氧的时间和温度来连续调节石墨烯薄膜的电阻和光学透射率。最初，臭氧暴露通过p型掺杂显著降低石墨烯膜的电阻，但随后由于表面氧化而导致电阻和光学透射率增加。提高处理温度可以显着提高电阻增加率。臭氧氧化的石墨烯不被去除，而是逐渐转化为氧化石墨烯（GO）。基于臭氧处理的这种效果，我们通过使用臭氧光刻法展示了定义明确的石墨烯图案，其中臭氧处理的石墨烯电极是单片的，但由绝缘GO区域隔开。这种单片石墨烯图案显示出低光学对比度、清洁且更亲水的表面，表明臭氧处理有希望用于实现高性能石墨烯基光电器件。
Tunable electrical and optical properties of graphene are vital to promote its use as film electrodes in a variety of devices. We developed an etching-free ozone treatment method to continuously tune the electrical resistance and optical transmittance of graphene films by simply varying the time and temperature of graphene exposure to ozone. Initially, ozone exposure dramatically decreases the electrical resistance of graphene films by p-doping, but this is followed by increases in the resistance and optical transmittance as a result of surface oxidation. The rate of resistance increase can be significantly increased by raising the treatment temperature. The ozone-oxidized graphene is not removed but is gradually transformed to graphene oxide (GO). On the basis of such effects of ozone treatment, we demonstrate a well-defined graphene pattern by using ozone photolithography, in which the ozone-treated graphene electrodes are monolithic but separated by insulating GO regions. Such a monolithic graphene pattern shows low optical contrast, a clean and more hydrophilic surface, Indicating the promising use of ozone treatment to achieve high-performance graphene-based optoelectronic devices.