当前位置: X-MOL 学术Adv. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Highly Conductive and Transparent Large‐Area Bilayer Graphene Realized by MoCl5 Intercalation
Advanced Materials ( IF 29.4 ) Pub Date : 2017-09-18 , DOI: 10.1002/adma.201702141
Hiroki Kinoshita 1 , Il Jeon 2 , Mina Maruyama 3 , Kenji Kawahara 4 , Yuri Terao 1 , Dong Ding 1 , Rika Matsumoto 5 , Yutaka Matsuo 2 , Susumu Okada 3 , Hiroki Ago 1, 4
Affiliation  

Bilayer graphene (BLG) comprises a 2D nanospace sandwiched by two parallel graphene sheets that can be used to intercalate molecules or ions for attaining novel functionalities. However, intercalation is mostly demonstrated with small, exfoliated graphene flakes. This study demonstrates intercalation of molybdenum chloride (MoCl5) into a large‐area, uniform BLG sheet, which is grown by chemical vapor deposition (CVD). This study reveals that the degree of MoCl5 intercalation strongly depends on the stacking order of the graphene; twist‐stacked graphene shows a much higher degree of intercalation than AB‐stacked. Density functional theory calculations suggest that weak interlayer coupling in the twist‐stacked graphene contributes to the effective intercalation. By selectively synthesizing twist‐rich BLG films through control of the CVD conditions, low sheet resistance (83 Ω ▫−1) is realized after MoCl5 intercalation, while maintaining high optical transmittance (≈95%). The low sheet resistance state is relatively stable in air for more than three months. Furthermore, the intercalated BLG film is applied to organic solar cells, realizing a high power conversion efficiency.

中文翻译:

MoCl5嵌入实现高导电透明大面积双层石墨烯

双层石墨烯(BLG)包含由两个平行石墨烯片夹在中间的2D纳米空间,可用于插入分子或离子以获得新颖的功能。但是,插层主要是用小的,脱落的石墨烯薄片证明的。这项研究表明,氯化钼(MoCl 5)嵌入到大面积均匀的BLG薄板中,该薄板通过化学气相沉积(CVD)生长。这项研究表明MoCl 5的程度插层很大程度上取决于石墨烯的堆叠顺序。扭曲堆叠的石墨烯比AB堆叠的嵌入度高得多。密度泛函理论计算表明,扭曲堆叠的石墨烯中的弱层间耦合有助于有效嵌入。通过控制CVD条件选择性地合成扭曲丰富的BLG薄膜,在MoCl 5插入后实现了低薄层电阻(83Ω▫ -1),同时保持了高透光率(≈95%)。低薄层电阻状态在空气中相对稳定超过三个月。此外,将嵌入的BLG膜应用于有机太阳能电池,实现了高功率转换效率。
更新日期:2017-09-18
down
wechat
bug