A stably enhanced transparent conductive graphene film obtained using an air-annealing method. (4th August 2016)

• Record Type: Journal Article
• Authors: Song, Xuefen; Wei, Dapeng; Sun, Tai; Yu, Leyong; Yang, Jun; Zhang, Yongna; Fang, Liang; Wei, Dacheng; Shi, Haofei; Du, Chunlei
• Is Part Of: Materials research express. Volume 3:Number 8(2016)
• Publication Date: 2016-08-04
• Subjects: pristine graphene -- transparent conductive property -- air-annealing method -- stability; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/3/8/085003
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: A simple and effective air-annealing technique was developed to stably improve both the electrical conductivity and light transmission of pristine graphene. After the graphene film was annealed in air at 250 °C for 80 min, the mobility and carrier concentration were both significantly enhanced, and the sheet resistance was greatly reduced with a decrease rate of ∼33%. Meanwhile, the transparency was also improved by more than 3%. The mechanism is carefully discussed. The reason might be that air-annealing conditions provide a suitable atmosphere to etch and remove amorphous carbons. More importantly, the enhanced transparent conductive properties of the air-annealed graphene films were extraordinarily stable, and remained almost unchanged for 100 days.