CAJ | 학술논문

石墨烯同时具备高透过率和良好的导电性可作为透明导电材料，然而由于CVD法制备的石墨烯的多畴特性，以及石墨烯本征载流子浓度较低，目前石墨烯透明导电膜方阻偏高，还无法满足实际应用需要，因此探索提高石墨烯的导电性对推进石墨烯透明导电膜应用发展是非常重要的。通过掺杂提高石墨烯的载流子浓度从而提高石墨烯的导电性是其中一条重要途径。采用CVD法在铜箔上制备了石墨烯透明导电膜，并用硝酸处理石墨烯，研究了掺杂作用对石墨烯载流子浓度以及电导率的影响。实验结果证实硝酸处理会在石墨烯中引入P型掺杂，掺杂使得载流子的浓度增加了约2.5倍，方阻从530~205Ω/□，显著改善了石墨烯的导电性能，而石墨烯高透过率特性并未因掺杂而降低。
석묵희동시구비고투과솔화량호적도전성가작위투명도전재료，연이유우CVD법제비적석묵희적다주특성，이급석묵희본정재류자농도교저，목전석묵희투명도전막방조편고，환무법만족실제응용수요，인차탐색제고석묵희적도전성대추진석묵희투명도전막응용발전시비상중요적。통과참잡제고석묵희적재류자농도종이제고석묵희적도전성시기중일조중요도경。채용CVD법재동박상제비료석묵희투명도전막，병용초산처리석묵희，연구료참잡작용대석묵희재류자농도이급전도솔적영향。실험결과증실초산처리회재석묵희중인입P형참잡，참잡사득재류자적농도증가료약2.5배，방조종530~205Ω/□，현저개선료석묵희적도전성능，이석묵희고투과솔특성병미인참잡이강저。
Graphene with high transmittance and good electrical conductivity is considered to be an ideal transparent conductive material. However, due to the polycrystalline property and low intrinsic carrier concentration of graphene, the sheet resistance of graphene transparent conductive film ( G-TCO) is on the high side, which can’t meet the requirements of practical application. Therefore, it is very important for the application of G-TCO to improve the conductivity of graphene. Improving carrier concentration of graphene by doping is one of the important ways to improve the electrical conductivity of G-TCO. G-TCO on Cu foils by chemical vapor deposition ( CVD) is prepared, treated by nitric acid. The effect of doping on the carrier concentration and conductivity of G-TCO is studied. Experimental results confirmed that P-type doping was intro-duced in G-TCO after nitric acid treatment, which made the carrier concentration increase 2. 5 times and sheet resistance drop from 530Ωto 205Ωand significantly improved the electrical conductivity of G-TCO. The high transmittance property of G-TCO was slightly reduced after nitric acid treatment.