Characterization of transparent p-type Cu:ZnS thin films grown by spray pyrolysis technique

Krishna, Vamsi; Mahesha, M.G.

doi:10.1016/j.jallcom.2020.156568

Cited by 19 publications

(11 citation statements)

References 31 publications

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“…From our previous study, [ 20 ] it was realized that the deposited sample had a mixed phase of wurtzite and cubic ZnS in the ratio of ~3:1. Crystallite size of nearly 11 nm was observed from (100) and (111) plane.…”

Section: Resultsmentioning

confidence: 99%

“…The oxidation state of the Mn in ZnMnS thin films was determined using X‐ray photoelectron spectroscopy (XPS), as +2. [ 20 ] Figure 1A displays the temperature‐dependent Raman spectra for the Zn 0.96 Mn 0.02 S thin film used to study the anharmonic phonon coupling. The black line represents the Lorentzian fit to the colored Raman data.…”

Section: Resultsmentioning

confidence: 99%

“…This sample is chosen considering the properties observed for the sample in our previous study. [ 3,20 ] Mn dopant shows useful luminescence and nonlinear optical properties. The main intention of the present work is to understand the chemical and structural uniformity of the deposited thin films using Raman mapping.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the anharmonic phonon decay, Fröhlich interactions, and phonon lifetime in Zn_0.98Mn_0.02S thin films through temperature‐dependent Raman spectroscopy

Mahesha

2023

J Raman Spectroscopy

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This report accounts for the occurrence of the temperature‐induced variation in the phonon properties and the spatial variation in the Raman spectra for the spray‐deposited Zn0.98Mn0.02S thin films. The study of the temperature dependence of the Raman line position, line width, and the phonon lifetime using the theoretical models that consider the thermal expansion and three‐ and four‐phonon anharmonic effects is the novelty of this work. The lifetime of the LO phonon in Zn0.98Mn0.02S thin film was as low as 0.234 ps, indicating material suitability for optical limiting applications. The intensity ratio I2LO/I1LO ranges within 0.5 at most of the (x, y) positions in the Raman mapping data, indicating the nanocrystalline nature of Zn0.98Mn0.02S.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Assessment of the anharmonic phonon decay, Fröhlich interactions, and phonon lifetime in Zn_0.98Mn_0.02S thin films through temperature‐dependent Raman spectroscopy

Mahesha

2023

J Raman Spectroscopy

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“…[ 15,16 ] Also, compared to the emission spectra in ZnS from our previous study, [ 3 ] 20 at% Mg doped ZnS showed very high luminescence. Another dopant that showed a blue, green, [ 17,18 ] and even orange red emission, [ 19 ] is Cu. Emission from Cu dopant in ZnS ranged from 415 nm to 600 nm as reported by various authors.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic investigation of Cu_xMg_0.2−xZn_0.8S (x = 0, 0.05, 0.10, 0.15) thin films for deep and dilute blue LED applications

Chattopadhyay

Misra

et al. 2021

Luminescence

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The effect of copper (Cu) doping on the luminescent properties of the spray deposited Mg0.2Zn0.8S thin films were investigated for the first time. The Mg0.2Zn0.8S film is an excellent luminescent material with strong blue emissions. In the current investigation, we doped Mg0.2Zn0.8S with Cu by taking (Cu + Mg) as 20 at% by keeping other element ratios constant. Among the different samples in the series, Cu0.05Mg0.15Zn0.8S has shown promising results with dark blue emission. Also, these films showed good structural formation with lower or no other impurities, which is evident from the X‐ray diffraction (XRD). Scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX) and atomic force microscopy (AFM) confirmed the improved material quality of Cu0.05Mg0.15Zn0.8S as compared to the pristine. Raman and X‐ray photoelectron spectroscopy (XPS) studies have been carried out for the samples. Various defects induced in the films were investigated by recording the photoluminescence (PL) spectra and Cu:(Mg0.2Zn0.8S) films exhibited the capability to produce dilute blue luminescence by absorbing ultraviolet (UV) light. The Cu0.05Mg0.15Zn0.8S film showed promising material property, which is suitable for light‐emitting diode (LED) applications.

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“…[7][8][9][10] Besides that, due to Cu element has many different oxidation states, so recently the nature of the green photoluminescence (PL) band still exists two different perspectives, in which they can be characteristic of Cu + ions (3d 10 ) 11,12) or Cu 2+ ions (3d 9 ) or the interstitial atoms. [13][14][15] Therefore, at present, the influence of Cu 2+ on the optical and photocatalytic properties of Cu doped ZnS [16][17][18] and the role of Cu + to p-type conductivity 19,20) in further applications of Cu doped ZnS thin films are still under consideration.…”

Section: Introductionmentioning

confidence: 99%

Energy transfer and luminescence enhancement of Cu²⁺ ions in polyvinyl pyrrolidone caped ZnS:Cu nanoparticles

Thi¹,

Ben²,

Thai³

et al. 2021

Jpn. J. Appl. Phys.

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Cu doped ZnS nanoparticles (ZnS:Cu) were synthesized by the co-precipitation method from Zn(CH3COO)2 0,1 M, Cu(CH3COO)2 0,1 M and Na2S 0,1 M solutions. Then they were coated by polyvinyl pyrrolidone (PVP) with different masses from 0.1 to 0.8 g. The photoluminescence excitation (PLE) spectra of 525 nm green photoluminescence (PL) band using xenon lamp shows the 330 nm peak and prominent peaks at 450, 470, 480 nm. The 330 nm peak is attributed by characterizes of nearshore absorption displacement of the ZnS crystal and the 450, 470, 480 nm peaks are involved in the adsorption displacement of Cu2+ (3d9) ions in the ZnS:Cu nanoparticles. The PVP coating hardly changes the crystal structure, the average crystal size, the morphology, the position of PL and PLE peaks that only increase their intensity. This enhancement is due to the transfer of excitation energy from PVP to Cu2+ ions (3d9) through the –C=O–M2+ (M2+: Zn2+, Cu2+) coordination bonds between the O atoms of the C=O group and ions Zn2+, Cu2+ on the surface of the nanoparticles.

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Characterization of transparent p-type Cu:ZnS thin films grown by spray pyrolysis technique

Cited by 19 publications

References 31 publications

Assessment of the anharmonic phonon decay, Fröhlich interactions, and phonon lifetime in Zn_0.98Mn_0.02S thin films through temperature‐dependent Raman spectroscopy

Assessment of the anharmonic phonon decay, Fröhlich interactions, and phonon lifetime in Zn_0.98Mn_0.02S thin films through temperature‐dependent Raman spectroscopy

Spectroscopic investigation of Cu_xMg_0.2−xZn_0.8S (x = 0, 0.05, 0.10, 0.15) thin films for deep and dilute blue LED applications

Energy transfer and luminescence enhancement of Cu²⁺ ions in polyvinyl pyrrolidone caped ZnS:Cu nanoparticles

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Characterization of transparent p-type Cu:ZnS thin films grown by spray pyrolysis technique

Cited by 19 publications

References 31 publications

Assessment of the anharmonic phonon decay, Fröhlich interactions, and phonon lifetime in Zn0.98Mn0.02S thin films through temperature‐dependent Raman spectroscopy

Assessment of the anharmonic phonon decay, Fröhlich interactions, and phonon lifetime in Zn0.98Mn0.02S thin films through temperature‐dependent Raman spectroscopy

Spectroscopic investigation of CuxMg0.2−xZn0.8S (x = 0, 0.05, 0.10, 0.15) thin films for deep and dilute blue LED applications

Energy transfer and luminescence enhancement of Cu2+ ions in polyvinyl pyrrolidone caped ZnS:Cu nanoparticles

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Assessment of the anharmonic phonon decay, Fröhlich interactions, and phonon lifetime in Zn_0.98Mn_0.02S thin films through temperature‐dependent Raman spectroscopy

Assessment of the anharmonic phonon decay, Fröhlich interactions, and phonon lifetime in Zn_0.98Mn_0.02S thin films through temperature‐dependent Raman spectroscopy

Spectroscopic investigation of Cu_xMg_0.2−xZn_0.8S (x = 0, 0.05, 0.10, 0.15) thin films for deep and dilute blue LED applications

Energy transfer and luminescence enhancement of Cu²⁺ ions in polyvinyl pyrrolidone caped ZnS:Cu nanoparticles