Effect of Precursor Molar Ratio of [S
 2−
 ]/[Zn
 2+
 ] on Particle Size and Photoluminescence of ZnS:Mn
 2+
 Nanocrystals

Dong, Dongqing; Li, Lan; Zhang, Xiaosong; Xu, Han; Hai-Ping, AN

doi:10.1088/0256-307x/24/9/055

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…The band with peak at ～595nm is assigned to the 4 T 1 → 6 A 1 transition within the 3d 5 configuration of Mn 2+ in QDs. However, the well-known broad emission around 430 nm related to sulfur vacancies is not observed in spectra [7,10,11]. Because the increase of the [S 2-]/[Zn 2+ ] ratio induces the defect related emission from ZnS host weaken while Mn 2+ emission enhances [7].…”

Section: Resultsmentioning

confidence: 95%

“…Furthermore, ZnS as a great host media for dopant is of great interest due to easy fabrication, excellent physical stability, lower phonon energies and non-toxic. Accordingly, ZnS nanocrystals doped with different active metal ions have been synthesis and their properties and potential application have been investigated [6][7][8]. Specially, the temperature dependences of the defect related blue emission of the ZnS host lattice and the Mn 2+ related orange emission in ZnS:Mn nanocrystals have been reported [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temperature Dependence of the Sole Mn2+ Emissions in Manganese Doped ZnS:Mn Quantum Dots

Zhang

Huang

et al. 2010

AMR

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ZnS:Mn Quantum dots (QDs) excess of [S2-] were synthesized by the wet chemical precipitation method with an average diameter of 3.9 nm. Temperature dependence photoluminescence measurements of ZnS:Mn QDs excited at 330nm only show a clear broad emission band with peak at ～595nm assigned to the 4T1→6A1 transition within the 3d5 configuration of Mn2+ in QDs. Through the temperature dependence of emission intensity, emission energy and full widths at half maximum (FWHM), the mechanisms are analyzed to explain the temperature behavior of Mn2+ emission observed here reasonably. The Mn2+ emission intensity decreases with increasing temperature. And the blue shift of the Mn2+ emission energy increase is also observed for increasing the temperature. Furthermore, the FWHM shows weak temperature dependence below 110 K and shows an increase with temperature increasing above 110 K. Consequently, the intrinsic mechanisms of temperature dependence photoluminescence are investigated.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Temperature Dependence of the Sole Mn2+ Emissions in Manganese Doped ZnS:Mn Quantum Dots

Zhang

Huang

et al. 2010

AMR

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“…The emission spectrum of Mn-doped ZnS consisted of two emission peak, among which a weak emission peak located at about 440nm and a strong emission peak located at about 594nm. The peak of 440nm was originated from defect states light-emitting of ZnS [8] matrix.The peak of 594nm was originated from characteristic emission of the internal electronics 4 T 1 → 6 A 1 of the manganese ions between the level transitions [9] . It also further demonstrates that Mn 2+ took the place of Zn 2+ in ZnS:Mn nanocrystallines.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Optical Properties of ZnS:Mn Nanocrystals

Hua

Wang

Sun

2013

AMR

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Abstract. By using Na2S•9H2O as source precursor and citric acid as stabilizer, ZnS:Mn nanocrystallines were synthesized by solvothermal method. They were annealed at 800 oC in the charcoal powder. The structure, morphology and optical properties were investigated by using X-ray diffraction spectra (XRD), scanning electron microscopy (SEM), and Spectrofluorophotometer respectively. The results showed that all unannealed ZnS:Mn nanocrystallines were about 3~5 nm of particle size and have cubic structure, and all annealed samples were about 30-70 nm of particle size and have mixed structure of the cubic phase and hexagonal phase. Moreover, Mn2+ took the place of Zn2+ in ZnS:Mn. With the increment of Mn2+ content, there occurred a strong emission peak at about 596nm which can be attributed to the Mn2 + leap from 4T1 to 6A1. In addition, the intensity of 596nm emission peak first increased and then decreased with the increment of Mn2+ content, reaching a maximum at about 15% of Mn2+ content. After annealing Mn2+ emission peak intensity is about 20 times that before annealing, and the luminescence peak also showed slightly blue shift.

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“…19 After rinsing with de-ionized water and methanol for several times, reaction products were dispersed in methanol solvent. ZnS QDs were prepared by coprecipitation method in an aqueous solution.…”

Section: Continuously Voltage-tunable Electroluminescence From a Monomentioning

confidence: 99%

“…19 The shift of the EL spectra is generally attributed to the structural changes, local heating, or applied voltages. 19 The shift of the EL spectra is generally attributed to the structural changes, local heating, or applied voltages.…”

Section: Continuously Voltage-tunable Electroluminescence From a Monomentioning

confidence: 99%

Continuously voltage-tunable electroluminescence from a monolayer of ZnS quantum dots

Xuan

Zhang

et al. 2011

Applied Physics Letters

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Electroluminescence of green CdSe/ZnS quantum dots enhanced by harvesting excitons from phosphorescent molecules Appl. Phys. Lett. 97, 253115 (2010); 10.1063/1.3530450 Mn-doped nanocrystals in light-emitting diodes: Energy-transfer to obtain electroluminescence from quantum dots Appl. Phys. Lett. 97, 113502 (2010); 10.1063/1.3489099 Shell-dependent electroluminescence from colloidal CdSe quantum dots in multilayer light-emitting diodes

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Effect of Precursor Molar Ratio of [S ²⁻ ]/[Zn ²⁺ ] on Particle Size and Photoluminescence of ZnS:Mn ²⁺ Nanocrystals

Cited by 9 publications

References 18 publications

Temperature Dependence of the Sole Mn<sup>2+</sup> Emissions in Manganese Doped ZnS:Mn Quantum Dots

Temperature Dependence of the Sole Mn<sup>2+</sup> Emissions in Manganese Doped ZnS:Mn Quantum Dots

Microstructure and Optical Properties of ZnS:Mn Nanocrystals

Continuously voltage-tunable electroluminescence from a monolayer of ZnS quantum dots

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Effect of Precursor Molar Ratio of [S 2− ]/[Zn 2+ ] on Particle Size and Photoluminescence of ZnS:Mn 2+ Nanocrystals

Cited by 9 publications

References 18 publications

Temperature Dependence of the Sole Mn<sup>2+</sup> Emissions in Manganese Doped ZnS:Mn Quantum Dots

Temperature Dependence of the Sole Mn<sup>2+</sup> Emissions in Manganese Doped ZnS:Mn Quantum Dots

Microstructure and Optical Properties of ZnS:Mn Nanocrystals

Continuously voltage-tunable electroluminescence from a monolayer of ZnS quantum dots

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Product

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Effect of Precursor Molar Ratio of [S ²⁻ ]/[Zn ²⁺ ] on Particle Size and Photoluminescence of ZnS:Mn ²⁺ Nanocrystals