journal article·2017-09-26

High-Quality Monolithic Graphene Films via Laterally Stitched Growth and Structural Repair of Isolated Flakes for Transparent Electronics

Hongyan Sun, Xinming Li, Yuanchang Li, Guoxin Chen, Zhiduo Liu, Fakhr E. Alam, Dan Dai, Li Li, Li Tao, Jian-Bin Xu, Ying Fang, Xuesong Li, Pei Zhao, Nan Jiang, Ding Chen, Cheng-Te Lin

Chemistry of Materials· Volume 29· Issue 18
Publisher page

Abstract

Exfoliation of graphene flakes in solution is a high-yield and low-cost synthesis method, but the quality of the obtained graphene flakes is not high, because of the presence of functional groups and structural defects. Therefore, the ability to synthesize high-quality graphene with excellent electrical properties is desirable for electronic applications. Here, we present a facile and rapid annealing approach with nickel for structural repair in isolated graphene flakes on rough insulating substrates, accompanied by lateral stitching of the isolated parts to form a continuous and monolithic film. This process involves the active carbon species being coalesced at the desaturation edge of graphene flakes. Meanwhile, the defects in graphene can be also repaired to improve its crystal quality and electrical properties. Significantly, the carrier mobility of graphene with excellent structural properties is >1000 cm 2 V –1 s –1 on average, nearly 10 times higher than that of the process with copper or 100 times higher than that of graphene via mere annealing. This approach to high-quality graphene on rough insulating substrates, with transfer-free and well-adapted characteristics, is promising for electronic and optoelectronic applications.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Graphene research and applications · Graphene and Nanomaterials Applications · Advancements in Battery Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China 315201

College of Materials Science and Engineering, Hunan University, Changsha 410082, P. R. China

National Center for Nanoscience and Technology, Beijing 100190, P. R. China

Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China

Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, P. R. China

State Key Laboratory of Electronic Thin Films and Integrated Devices and School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu, China

Institute of Applied Mechanics and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou 310012, P. R. China

University of Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing 100049, P. R. China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Zhejiang Province · Ningbo Municipality

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