Photoluminescence and photoconductive characteristics of hydrothermally synthesized ZnO nanoparticles

Mishra, Sheo K.; Srivastava, Rajneesh; Prakash, Satya; Yadav, Raghvendra Singh; Panday, Ashwin

doi:10.2478/s11772-010-0037-4

Cited by 137 publications

(87 citation statements)

References 34 publications

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“…The two blue emission band (K5 and K6) at 443 and 458 nm is attributed to singly ionized Zn vacancies [36]. There are blue-green emission bands (K8) at 484 nm due to a surface defects in the ZnO NPs corresponding to the transition between oxygen vacancy and oxygen interstitial defect [37]. …”

Section: Uv-vis-nir Spectroscopic Studiesmentioning

confidence: 99%

Synthesis, structural and optical properties of pure ZnO and Co doped ZnO nanoparticles prepared by the co-precipitation method

Devi¹,

Velu²

2016

J Theor Appl Phys

110

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Pure ZnO and Cobalt (Co) doped ZnO nanoparticles (NPs) were synthesized by the co-precipitation method. The synthesized nanoparticles retained the wurtzite hexagonal structure, which was confirmed by X-ray diffraction studies. From FESEM studies, ZnO and Co doped ZnO NPs showed Spherical and nanorod mixed phase and Spherical like morphology, respectively. The amount of dopant (Co 2? ) incorporated into ZnO sample was determined by EDAX. The FT-IR spectra confirmed the Zn-O stretching bands at 438 and 427 cm -1 for ZnO and Co doped ZnO NPs. From the UV-VIS spectroscopic measurements, the excitonic pecks were found around 376 and 370 nm for the respective samples. The photoluminescence measurements revealed that the broad emission was composed of seven different bands due to zinc vacancies, oxygen vacancies and surface defects. The dynamic light scattering (DLS) and Zeta potential measurements were used to find out the size and surface charges.

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Section: Uv-vis-nir Spectroscopic Studiesmentioning

confidence: 99%

Synthesis, structural and optical properties of pure ZnO and Co doped ZnO nanoparticles prepared by the co-precipitation method

Devi¹,

Velu²

2016

J Theor Appl Phys

110

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“…UV-visible absorption study Figure 4a shows room temperature UV-visible absorption spectrum of ZnO structures synthesized by a thermal decomposition of zinc oxalate. The ZnO particles have band edge absorption at 370 nm.Blue shifting of bandedge as compared to its bulk counterpart may be attributed to dimension of ZnO [3,13]. Figure 4b shows UV-visible absorption spectrum of ZnO microstructures prepared by thermal decomposition of zinc nitrate at 500 o C for 3h which exhibits absorbance peak at 381 nm.…”

Section: Resultsmentioning

confidence: 99%

“…Zinc oxide (ZnO) is a material of particular interest because it possesses unique optical and electrical properties. It is a wide-band semiconductor (3.37 eV) and is a good candidate for many applications [1][2][3][4][5][6][7][8]. For example thin films of ZnO were reported to display good photoconductivity and high transparency in visible region and has been used as transparent electrodes for solar cells.…”

Section: Introductionmentioning

confidence: 99%

Study on Photoconductivity in Air and Vacuum of ZnO Prepared by different materials

Saxena¹

2018

IJRASET

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O] was used as precursor to prepare zinc oxide by thermal decomposition method. Its photoconductivity and dark-conductivity properties have been studied in air as well as in vacuum. Voltage dependence of photocurrent and dark-current has been observed at room temperature in air under UV-vis illumination. Stuructural study of ZnO microstructures has been analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Rise and decay curve in air exhibits anomalous behavior wherein the photocurrent decreases even during steady illumination. In vacuum, the rise of photocurrent becomes slow and prolonged.

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“…37 The conduction mechanism of Ru-doped ZnO thin¯lms was investigated by the plot of logI Fig. 5(d).…”

Section: I-v Characteristicsmentioning

confidence: 99%

Effect of Ruthenium Concentration on Structural and I-V Characteristics of ZnO Thin Films by Sol–Gel Method

Vettumperumal¹,

Kalyanaraman²,

Thangavel

2017

J. Mol. Eng. Mater.

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Nanocrystalline ruthenium (Ru)-doped ZnO thin¯lms on sapphire substrate was prepared using sol-gel method by spin coating technique. The structural and I-V characteristics of Ru doped ZnO thin¯lms were studied from the X-ray di®raction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) analysis and Raman spectroscopy. X-ray di®raction (XRD) results revealed that the deposited¯lms belonged to hexagonal wurtzite structure with c-axis orientation. It is also con¯rmed from the Raman spectra. Enhancement of longitudinal optical (LO) phonon is observed by the strong electron-phonon interaction. An observed increment in sheet resistance with increase in dopant percentage of Ru (1-2 mol%) in ZnO¯lms was found and better I-V characteristic behavior was observed at 1 mol% of Ru-doped ZnO thin lms. Trap limited current°ow inside the material was calculated from the log I versus log V plot in the higher voltage region.

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Photoluminescence and photoconductive characteristics of hydrothermally synthesized ZnO nanoparticles

Cited by 137 publications

References 34 publications

Synthesis, structural and optical properties of pure ZnO and Co doped ZnO nanoparticles prepared by the co-precipitation method

Synthesis, structural and optical properties of pure ZnO and Co doped ZnO nanoparticles prepared by the co-precipitation method

Study on Photoconductivity in Air and Vacuum of ZnO Prepared by different materials

Effect of Ruthenium Concentration on Structural and I-V Characteristics of ZnO Thin Films by Sol–Gel Method

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