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2D Doping Layer for Flexible Transparent Conducting Graphene Electrodes with Low Sheet Resistance and High Stability
Advanced Electronic Materials ( IF 6.2 ) Pub Date : 2018-02-01 , DOI: 10.1002/aelm.201700622
Young-Min Seo 1 , Hye-Jin Cho 1 , Hyeon-Sik Jang 1 , Wonseok Jang 1 , Jae-Young Lim 2 , Yamujin Jang 1 , Taejun Gu 1 , Jae-Young Choi 1, 2 , Dongmok Whang 1, 2
Affiliation  

Graphene, an ultrathin flexible material with high carrier mobility and transparency, is a promising candidate for flexible transparent conducting electrodes (TCEs). However, its resistance is too high for use as a TCE material by itself. Therefore, fabricating graphene with low sheet resistance and high stability is a significant challenge for practical applications of graphene TCEs. In this study, a 2D doping layer (DL) is proposed, which can stably dope graphene to develop a highly transparent graphene TCE with low sheet resistance. For this purpose, the 2D DL is prepared by immobilizing dopant molecules on transparent graphene oxide and simply stacking it with graphene enables efficient and stable charge transfer doping of the graphene. A TCE fabricated by alternately stacking the DL and graphene has a high optical transmittance of over 90% at a wavelength of 550 nm and a low sheet resistance of 50 Ω sq−1. Furthermore, the sheet resistance shows an excellent thermal and mechanical stability with a change of only about 2% in a bending test of 20 000 cycles or at a high temperature of 220 °C. This result shows that stacking graphene with stable 2D DL is a promising approach for graphene‐based next generation TCE.

中文翻译:

低薄层电阻和高稳定性的柔性透明导电石墨烯电极的二维掺杂层

石墨烯是一种具有高载流子迁移率和透明度的超薄柔性材料,是柔性透明导电电极(TCE)的有希望的候选者。然而,其电阻太高而不能单独用作TCE材料。因此,对于石墨烯TCE的实际应用而言,制造具有低薄层电阻和高稳定性的石墨烯是一项重大挑战。在这项研究中,提出了一种2D掺杂层(DL),该层可以稳定地掺杂石墨烯,从而开发出具有低薄层电阻的高度透明的石墨烯TCE。为此,通过将掺杂剂分子固定在透明的氧化石墨烯上并简单地将其与石墨烯堆叠,可以有效且稳定地对石墨烯进行电荷转移掺杂,从而制备2D DL。-1。此外,薄层电阻显示出极好的热稳定性和机械稳定性,在20 000次循环的弯曲试验中或在220°C的高温下,其薄膜电阻仅变化约2%。该结果表明,将具有稳定2D DL的石墨烯堆叠是基于石墨烯的下一代TCE的一种有前途的方法。
更新日期:2018-02-01
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