Study of Ultraviolet Emission Spectra in ZnO Thin Films

Lu, Youming; Li, X. P.; Cao, Peijiang; Su, Shichen; Jia, Fang; Han, Shun; Liu, W. J.; Zhu, Deliang; C., X.

doi:10.1155/2013/797232

Cited by 22 publications

(14 citation statements)

References 34 publications

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“…The typical photoluminescence spectra of ZnO have emission bands in the UV and visible regions. Usually, the UV luminescence peak is considered as the characteristics emission of ZnO and it is ascribed to the band edge emission or transition of exciton [31]. It is exciting to note that there is no UV emission peak in the PL spectra of prepared samples.…”

Section: Photoluminescence (Pl) Characteristicmentioning

confidence: 99%

Photoluminescence and intrinsic ferromagnetism of Fe doped zinc oxide

2020

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Zn 1−x Fe x O nanoparticles with different doping concentration i.e. (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05) were successfully synthesized via hydrothermal method. The crystal structure, morphology, optical and magnetic properties were studied by X-ray diffraction, field emission scanning electron microscope, UV-visible, photoluminescence spectra (PL) and vibrating sample magnetometer. The experimental results show that all the samples possess a single phase hexagonal wurtzite structure, no impurity phase was observed. The crystallite size decreases with the increase in Fe concentration. Optical absorption analysis by UV-visible exhibits a slight blueshift in the bandgap with increasing doping concentration. PL spectra shows that the emission peak in the UV region is absent for all the samples. All the emission peaks are in the visible region. Shifting of PL emission peaks is not observed indicating that the intrinsic defects are consistent. The magnetic observation indicated that all the samples including pure zinc oxide exhibit room temperature ferromagnetism (RTFM). The observed RTFM is attributed to the bound magnetic polaron that arises due to the presence of singly ionized oxygen vacancy (V o) as indicated by PL spectra.

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Section: Photoluminescence (Pl) Characteristicmentioning

confidence: 99%

Photoluminescence and intrinsic ferromagnetism of Fe doped zinc oxide

2020

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“…Относительно природы поло-сы 374 nm (3.31 eV) в литературе нет единого мнения. Энергетическое положение полосы позволяет связы-вать ее с несколькими излучательными процессами, в частности, с излучением 1LO-свободного экситона [1], с переходом свободный электрон−акцептор [13][14][15], с излучением связанных экситонов, в локализованных на акцепторе [16,17] с двухэлектронными процессами в излучении связанных экситонов [18] и др. Поло-са наблюдается в широком температурном интервале от гелиевых до комнатных температур.…”

Section: рисunclassified

Фотоиндуцированные эффекты в спектрах люминесценции ZnO

Акопян¹,

Лабзовская²,

Novikov³

et al. 2018

Физика Твердого Тела

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The effect of intense UV irradiation on the photoluminescence (PL) spectra of ZnO powders and nanocrystalline films obtained by atomic layer deposition (ALD) was investigated. At room temperature, the behavior of the spectra under continuous UV irradiation in multiple vacuum-atmosphere cycles was studied. The changes in the intensities of exciton radiation and radiation in the “green” band region, associated with the phenomena of oxygen photodesorption and photoadsorption, are discussed. In the temperature range of 5–300 K, the effect of strong UV irradiation on the near-edge luminescence spectrum of ZnO films was studied. The nature of a new line arising in the photoluminescence spectra of an irradiated film in the region of emission of bound excitons is discussed.

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“…Zinc oxide (ZnO) is a type II-VI transparent semiconductor compound with n-type natural conductivity, which is ensured by the existence of "defects" related to interstitial zinc atoms and oxygen vacancies. Its notable properties: high exciton binding energy, a wide bandgap around 3.37 eV and a high chemical and physical stability [1]. These properties make it a suitable host material for different dopants, such as boron B [2], aluminum Al [3], gallium Ga [4] and fluoride F [5].…”

Section: Introductionmentioning

confidence: 99%

Growth and Characterization of (Tb,Yb) Co-Doping Sprayed ZnO Thin Films

et al. 2020

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Structural, optical and electrical properties of (ytterbium/terbium) co-doped ZnO thin films deposited on glass substrates using the spray pyrolysis method were investigated. The films exhibited the hexagonal wurtzite structure with a preferential orientation along (002) direction. No secondary phase was observed in the X-ray diffraction detection limit. Atomic force microscopy (AFM) was performed and root means square roughness (RMS) of our samples decreased with terbium content. Photoluminescence measurements showed a luminescence band at 980 nm which is characteristic of Yb3+ transition between the electronic levels 2F5/2 to 2F7/2. This is experimental evidence for an efficient energy transfer from the ZnO matrix to Yb. Hall Effect measurements gave a low electrical resistivity value around 6.0 × 10−3 Ω.cm. Such characteristics make these films of interest to photovoltaic devices.

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Study of Ultraviolet Emission Spectra in ZnO Thin Films

Cited by 22 publications

References 34 publications

Photoluminescence and intrinsic ferromagnetism of Fe doped zinc oxide

Photoluminescence and intrinsic ferromagnetism of Fe doped zinc oxide

Фотоиндуцированные эффекты в спектрах люминесценции ZnO

Growth and Characterization of (Tb,Yb) Co-Doping Sprayed ZnO Thin Films

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