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1篇 您的检索式：作者名="Kayla Green"

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		题名	作者	年代	出处	被引量
	1	Nitrogen-doped graphene quantum dots: Optical properties modification and photovoltaic applications显示文摘In this work,we utilize a bottom-up approach to synthesize nitrogen self-doped graphene quantum dots (NGQDs) from a single glucosamine precursor via an eco-friendly microwave-assisted hydrothermal method.Structural and optical properties of as-produced NGQDs are further modified using controlled ozone treatment.Ozone-treated NGQDs (Oz-NGQDs) are reduced in size to 5.5 nm with clear changes in the lattice structure and/D//G Raman ratios due to the introduction/alteration of oxygen-containing functional groups detected by Fourier-transform infrared (FTIR) spectrometer and further verified by energy dispersive X-ray spectroscopy (EDX) showing increased atomic/weight percentage of oxygen atoms.Along with structural modifications,GQDs experience decrease in ultraviolet-visible (UV-vis) absorption coupled with progressive enhancement of visible (up to 16 min treatment) and near-infrared (NIR)(up to 45 min treatment) fluorescence.This allows fine-tuning optical properties of NGQDs for solar cell applications yielding controlled emission increase,while controlled emission quenching was achieved by either blue laser or thermal treatment.Optimized Oz-NGQDs were further used to form a photoactive layer of solar calls with a maximum efficiency of 2.64% providing a 6-fold enhancement over untreated NGQD devices and a 3-fold increase in fill factor/current density.This study suggests simple routes to alter and optimize optical properties of scalably produced NGQDs to boost the photovoltaic performance of solar cells.	Md Tanvir Hasan Roberto Gonzalez-Rodriguez Conor Ryan Kristof Pota Kayla Green Jeffery L.Coffer Anton V.Naumov	2019	Nano Research2019，12，5：	1

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