Triangular CdS nanostructure: effect of Mn doping on photoluminescence, electron spin resonance, and magneto-optical properties

被引:13
作者
Jadhav, Punam A. [1 ]
Panmand, Rajendra P. [2 ]
Patil, Deepak R. [2 ]
Fouad, H. [3 ,4 ]
Gosavi, Suresh W. [1 ]
Kale, Bharat B. [2 ]
机构
[1] Savitribai Phule Pune Univ, Ctr Adv Studies Mat Sci & Solid State Phys, Dept Phys, Pune 411007, Maharashtra, India
[2] CMET, Nanocrystalline Mat Div, Pune 411008, Maharashtra, India
[3] King Saud Univ, Appl Med Sci Dept, RCC, POB 2454, Riyadh 11451, Saudi Arabia
[4] Helwan Univ, Fac Engn, Biomed Engn Dept, POB 11792, Helwan, Egypt
关键词
Magneto-optic Faraday effect; Dilute magnetic semiconductors; Electron spin resonance; Photoluminescence; Verdet constant; Colloidal nanoparticles; SENSITIZED SOLAR-CELLS; QUANTUM DOTS; NANOCRYSTALS; EFFICIENCY; NANOPARTICLES; LUMINESCENCE; EMISSION; STRATEGY; ENERGY; BOOST;
D O I
10.1007/s11051-017-3903-x
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this paper, we report synthesis and study of magneto-optic Faraday effect for dilute magnetic semiconductor nanostructure. The colloidal CdS nanocrystals were prepared via hot injection method and successfully doped with Mn2+ cations. The synthesized nanoparticles were characterized by using UV-Vis spectroscopy, X-ray diffraction, photoluminescence spectroscopy, transmission electron microscopy, and electron spin resonance spectroscopy. Systematic studies on effect of Mn2+ doping on photoluminescence, electron spin resonance, and magneto-optical properties are carried out. UV-Vis spectral analysis confirms blue shift in bandgap of CdS nanoparticles due to quantum confinement effect. The X-ray diffraction study confirms hexagonal wurtzite phase formation of CdS nanoparticles without any impurity phases. TEM analysis confirms uniform particle size, having particle size distribution around 5 nm. As-synthesized undoped CdS shows triangular-shaped nanocrystals with hexagonal structure; however, triangular shape of CdS nanoparticles is not conserved after Mn2+ doping. The photoluminescence characteristic spectra of Mn2+-doped CdS nanocrystals showed emission band at 660 nm and its intensity was found to increase with increasing Mn2+ concentration. Electron spin resonance signal, with six-line hyperfine structure splitting, confirmed doping of Mn2+ ions in CdS lattice. Magneto-optic measurements showed linear variation of Faraday rotation with respect to applied magnetic field, indicating paramagnetic behavior of Mn-doped CdS. The highest Verdet constant 24.81 deg/T cm was observed for 2% Mn-doped CdS nanocrystals, which further decreases with increasing Mn2+ concentration.
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页数:10
相关论文
共 38 条
[31]   Davydov Split PL Emission and EPR Correlation in β-MnS Layered CdS Nanorods [J].
Sambandam, Balaji ;
Manoharan, Periakaruppan T. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (22) :9486-9496
[32]   Mn-Doped Quantum Dot Sensitized Solar Cells: A Strategy to Boost Efficiency over 5% [J].
Santra, Pralay K. ;
Kamat, Prashant V. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (05) :2508-2511
[33]   Highly Luminescent Mn-Doped ZnS Nanocrystals: Gram-Scale Synthesis [J].
Srivastava, Bhupendra B. ;
Jana, Santanu ;
Karan, Niladri S. ;
Paria, Sayantan ;
Jana, Nikhil R. ;
Sarma, D. D. ;
Pradhan, Narayan .
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2010, 1 (09) :1454-1458
[34]   Shape-Controlled Synthesis of CdS Nanostructures via a Solvothermal Method [J].
Wang, Xiuli ;
Feng, Zhaochi ;
Fan, Dayong ;
Fan, Fengtao ;
Li, Can .
CRYSTAL GROWTH & DESIGN, 2010, 10 (12) :5312-5318
[35]   Giant Spin Splitting in Optically Active ZnMnTe/ZnMgTe Core/Shell Nanowires [J].
Wojnar, Piotr ;
Janik, Elzbieta ;
Baczewski, Lech T. ;
Kret, Slawomir ;
Dynowska, Elzbieta ;
Wojciechowski, Tomasz ;
Suffczynski, Jan ;
Papierska, Joanna ;
Kossacki, Piotr ;
Karczewski, Grzegorz ;
Kossut, Jacek ;
Wojtowicz, Tomasz .
NANO LETTERS, 2012, 12 (07) :3404-3409
[36]   Long-Lived Charge Carriers in Mn-Doped CdS Quantum Dots for Photoelectrochemical Cytosensing [J].
Wu, Peng ;
Pan, Jian-Bing ;
Li, Xiang-Ling ;
Hou, Xiandeng ;
Xu, Jing-Juan ;
Chen, Hong-Yuan .
CHEMISTRY-A EUROPEAN JOURNAL, 2015, 21 (13) :5129-5135
[37]   General Synthesis and White Light Emission of Diluted Magnetic Semiconductor Nanowires Using Single-Source Precursors [J].
Yang, Gaoling ;
Xu, Guangyuan ;
Chen, Bingkun ;
Zou, Shuangyang ;
Liu, Ruibin ;
Zhong, Haizheng ;
Zou, Bingsuo .
CHEMISTRY OF MATERIALS, 2013, 25 (15) :3260-3266
[38]  
Zayets V, 2010, FRONTIERS IN GUIDED WAVE OPTICS AND OPTOELECTRONICS, P321