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13 papers
Self-formed 2D/3D Heterostructure on the Edge of 2D Ruddlesden-Popper Hybrid Perovskites Responsible for Intriguing Optoelectronic Properties and Higher Cell Efficiency
Zhaojun Qin, Shenyu Dai, Chalapathi Charan Gajjala +15
The observation of low energy edge photoluminescence and its beneficial effect on the solar cell efficiency of Ruddlesden-Popper perovskites has unleashed an intensive research eff…
Revealing the Origin of Luminescence Center in 0D Cs4PbBr6 Perovskite
Zhaojun Qin, Shenyu Dai, Viktor G. Hadjiev +13
Zero dimensional perovskite Cs4PbBr6 has attracted considerable attention recently not only because of its highly efficient green photoluminescence (PL), but also its two highly de…
Bright Luminescent Surface States on the Edges of Wide-bandgap Two-dimensional Lead Halide Perovskite
Yanan Wang, Chong Wang, Xinghua Su +9
Three-dimensional lead halide perovskites have surprised people for their defect-tolerant electronic and optical properties, two-dimensional lead halide layered structures exhibit…
Synthetic Graphene Grown by Chemical Vapor Deposition on Copper Foils
Ting Fung Chung, Tian Shen, Helin Cao +5
The discovery of graphene, a single layer of covalently bonded carbon atoms, has attracted intense interests. Initial studies using mechanically exfoliated graphene unveiled its re…
Graphene Induced Surface Reconstruction of Cu
Jifa Tian, Helin Cao, Wei Wu +3
An atomic-scale study utilizing scanning tunneling microscopy (STM) in ultrahigh vacuum (UHV) is performed on large single crystalline graphene grains synthesized on Cu foil by a c…
Growth from Below: Bilayer Graphene on Copper by Chemical Vapor Deposition
Shu Nie, Wei Wu, Shirui Xing +4
We evaluate how a second graphene layer forms and grows on Cu foils during chemical vapor deposition (CVD). Low-energy electron diffraction and microscopy is used to reveal that th…