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Dive into the research topics where Surjan Singh is active.

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Featured researches published by Surjan Singh.


Nanotechnology | 2011

Efficient dual mode multicolor luminescence in a lanthanide doped hybrid nanostructure: a multifunctional material

Surjan Singh; Abhishek K. Singh; S.B. Rai

The present work deals with inorganic-organic hybrid nanostructures capable of producing intense visible emission via upconversion (UC), downconversion (DC), and energy transfer (ET) processes which show the potential of the material as a luminescent solar collector (LSC), particularly to improve the efficiency of silicon solar cells. To achieve this, Gd2O3:Yb3+/Er3+ phosphor (average particle size∼35 nm) and a Eu(DBM)3Phen organic complex have been synthesized separately and then the hybrid structure has been developed using a simple mixing procedure. Intense UC emission (in the red, green, and blue regions) due to Er3+ is observed on near infrared (976 nm) excitation which shows color tunability with input pump power. In contrast, intense red emission of Eu3+ is observed on ultaviolet (UV) (355 nm) excitation. The feasibility of energy transfer from Er3+ ions to Eu3+ ions has also been noted. These excellent optical properties are retained even if the particles of the hybrid nanostructure are dispersed in liquid medium, which also makes it suitable for security ink purposes.


Applied Physics B | 2010

Efficient UV–visible up-conversion emission in Er3+/Yb3+ co-doped La2O3 nano-crystalline phosphor

Surjan Singh; Anjali Singh; Devendra Kumar; Om Prakash; S.B. Rai


Heat and Mass Transfer | 1997

Natural convection in vertical concentric annuli under a radial magnetic field

Surjan Singh; B. K. Jha; A. K. Singh


Materials Research Bulletin | 2012

Optical characteristics and charge transfer band excitation of Dy3+ doped Y2O3 phosphor

K. Mishra; Surjan Singh; A.K. Singh; S.B. Rai


Applied Physics B | 2010

SrAl4O7:Tm3+/Yb3+ nanocrystalline blue phosphor: structural, thermal and optical properties

Neeraj Kumar Giri; Surjan Singh; D.K. Rai; S.B. Rai


Chemical Physics Letters | 2010

Structural and optical properties of Sm(DBM)3Phen doped in poly(methyl methacrylate) (PMMA): An evidence for cascading energy transfer process

Anjali Singh; Surjan Singh; Rajiv Prakash; S.B. Rai


Heat and Mass Transfer | 2016

Analysis of classical Fourier, SPL and DPL heat transfer model in biological tissues in presence of metabolic and external heat source

Dinesh Kumar; Surjan Singh; K.N. Rai


Heat and Mass Transfer | 1998

Numerical solution of moving boundary problem in a finite domain

K.N. Rai; Surjan Singh


Archive | 2013

Wavelet Collocation Solution for Convective Radiative Continuously Moving Fin with Temperature-Dependent Thermal Conductivity

Surjan Singh; Dinesh Kumar; K.N. Rai


International Journal of Applied and Computational Mathematics | 2017

Legendre Wavelet Collocation Solution for System of Linear and Nonlinear Delay Differential Equations

Dinesh Kumar; Subrahmanayam Upadhyay; Surjan Singh; K.N. Rai

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K.N. Rai

Indian Institute of Technology (BHU) Varanasi

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S.B. Rai

Banaras Hindu University

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Anjali Singh

Banaras Hindu University

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A. K. Singh

Banaras Hindu University

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A.K. Singh

Banaras Hindu University

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B. K. Jha

Banaras Hindu University

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D.K. Rai

Jaypee Institute of Information Technology

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K. Mishra

Banaras Hindu University

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