Is There Real Upconversion Photoluminescence from Graphene Quantum Dots?

被引：146

作者：

Gan, Zhixing ^{[1
]}

Wu, Xinglong ^{[1
]}

Zhou, Gengxia ^{[1
]}

Shen, Jiancang ^{[1
]}

Chu, Paul K. ^{[2
]}

机构：

[1] Nanjing Univ, Sch Phys, Lab Modern Acoust MOE, Nanjing 210093, Jiangsu, Peoples R China

[2] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

来源：

ADVANCED OPTICAL MATERIALS | 2013年 / 1卷 / 08期

关键词：

ANTI-STOKES PHOTOLUMINESCENCE; ULTRASONIC PREPARATION; CARBON DOTS; OXIDE; PHOTOCATALYSIS; FLUORESCENCE; LUMINESCENCE;

D O I：

10.1002/adom.201300152

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Upconversion photoluminescence (PL) from graphene quantum dots (GQDs) excited by a xenon lamp is artificial. It is essentially excited by the second-order diffraction light of wavelength λ/2 co-existing in the red light. Real upconversion PL from GQDs is observed under excitation with a femtosecond pulsed laser, implying that coherent photons with high enough power density can be upconverted into blue light via GQDs. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：554 / 558

页数：5

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