title: Facile synthesis of analogous graphene quantum dots with sp(2) hybridized carbon atom dominant structures and their photovoltaic application.
abstract: Graphene quantum dot (GQD) is an emerging class of zero-dimensional nanocarbon material with many novel applications. It is of scientific importance to prepare GQDs with more perfect structures, that is, GQDs containing negligible oxygenous defects, for both optimizing their optical properties and helping in their photovoltaic applications. Herein, a new strategy for the facile preparation of "pristine" GQDs is reported. The method we presented is a combination of a bottom-up synthetic and a solvent-induced interface separation process, during which the target products with highly crystalline structure were selected by the organic solvent. The obtained organic soluble GQDs (O-GQDs) showed a significant difference in structure and composition compared with ordinary aqueous soluble GQDs, thus leading to a series of novel properties. Furthermore, O-GQDs were applied as electron-acceptors in a poly(3-hexylthiophene) (P3HT)-based organic photovoltaic device. The performance highlights that O-GQD has potential to be a novel electron-acceptor material due to the sp(2) hybridized carbon atom dominant structure and good solubility in organic solvents.
authors.affiliation: School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, P. R. China. weifeng@tju.edu.cn.
authors.forename: Zhengcheng
authors.initials: Z
authors.lastname: Huang
authors.forename: Yongtao
authors.initials: Y
authors.lastname: Shen
authors.forename: Yu
authors.initials: Y
authors.lastname: Li
authors.forename: Wenjun
authors.initials: W
authors.lastname: Zheng
authors.forename: Yunjia
authors.initials: Y
authors.lastname: Xue
authors.forename: Chengqun
authors.initials: C
authors.lastname: Qin
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Jingxiang
authors.initials: J
authors.lastname: Hao
authors.forename: Wei
authors.initials: W
authors.lastname: Feng