Dominant formation of h-BC2N in h-BxCyNz films: CVD synthesis and characterization. (September 2021)

• Record Type: Journal Article
• Authors: Seo, Tae Hoon; Lee, WonKi; Lee, Kyu Seung; Hwang, Jun Yeon; Son, Dong Ick; Ahn, Seokhoon; Cho, Hyunjin; Kim, Myung Jong
• Is Part Of: Carbon. Volume 182(2021)
• Page Start: 791
• Page End: 798
• Publication Date: 2021-09
• Subjects: h-BC2N -- Bandgap -- Chemical vapor deposition -- Optoelectronic application; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2021.06.080
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Arranging carbon, boron, and nitrogen atoms in a sp 2 network can give rise to tunable electronic properties from insulators ( h -BN) to metals (graphene). For semiconductor applications, the construction of a ternary structure ( h -Bx Cy Nz ) is highly desirable, but its uniform and large-area synthesis has remained a great challenge. This challenge has been attempted by a facile chemical vapor deposition method with a single molecular precursor, N-tri-methyl borazine where boron, carbon, and nitrogen atoms are covalently bonded, onto Ni catalysts in conjunction with the quenching method after the synthesis. The atomic structure closely resembles h -BC2 N as revealed by XPS (B:C:N ∼ 1:1.8:1) and nanometer resolution EELS mapping, and the photoluminescence and electroluminescence observed from the h -BC2 N film were in agreement, proving its well-established bandgap of 2.15 eV. As a practical application, the utilization of h -BC2 N film for 2D light emitting diodes was demonstrated. Though films might have impurities such as small h -BN fragments and h -Bx Cy Nz other than h -BC2 N phase, we believe that this work provide a starting point of controlling the ternary BCN compounds that retain sp 2 hybridized chemical bonds. Graphical abstract: h-BC2N has been synthesized by a facile chemical vapor deposition method with a single molecular precursor, N-tri-methyl borazine. Image 1