UV electroluminescence emissions from high-quality ZnO/ZnMgO multiple quantum well active layer light-emitting diodes

Chen, Shanshan; Zhan, Tengrun; Pan, Xinhua; He, Haiping; Huang, Jingyun; Lü, Bin; Ye, Zhizhen

doi:10.1039/d1ra06685d

Cited by 9 publications

(1 citation statement)

References 34 publications

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“…Taking into account their wide optical spectrum from the deep-blue to deep-ultraviolet regions, the compounds or alloys made of MgO and ZnO (ZMO) have been investigated for numerous applications, including light-emitting diode [ 1 ], photosensors [ 2 ], photocatalysts [ 3 ], photodetectors [ 4 ], solar cells [ 5 ] and thermoelectric devices [ 6 ]. Controlling the ratio between the Mg and Zn can realize bandgap engineering from 3.3 to 7.8 eV [ 7 , 8 , 9 , 10 ], making ZMO a potential material for many optoelectronic devices.…”

Section: Introductionmentioning

confidence: 99%

Electronic and Optical Properties of Rocksalt Mg1−xZnxO and Wurtzite Zn1−xMgxO with Varied Concentrations of Magnesium and Zinc

et al. 2022

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The structural, electronic and optical properties of rocksalt Mg1−xZnxO and wurtzite Zn1−xMgxO with the concentration of Zn and Mg varying from 0.125 to 0.875 were investigated using density functional theory (DFT), DFT+U, linear response theory and the Bethe–Salpeter equation. According to the experimental band gap for varied concentrations of magnesium and zinc, modeling the supercell was utilized for the varied concentrations of Mg/Zn/O compounds in order to not only avoid constructing the complicated interface systems that are observed in the experiments but also take into account the excitonic effects that usually require huge computational resources. From the calculated density of states, the Zn states are highly related to the edge of the conduction band minimum and responsible for the width of bandgap. In addition, the contribution of Zn–d states is below expectations as they are located away from the VBM. As for the optical response, an increase in Zn concentration would cause a red-shifted spectrum, on the whole. In contrast, the higher concentration of Mg also triggers the blue-shift of the optical spectrum. In addition, anisotropic properties could be found in the spectrum with consideration of the excitonic effects, whereas there is no apparent difference in optical response based on linear response theory. In addition, the optical features of this work reflect the characteristic peaks of the literature around the absorption onset.

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Section: Introductionmentioning

confidence: 99%

Electronic and Optical Properties of Rocksalt Mg1−xZnxO and Wurtzite Zn1−xMgxO with Varied Concentrations of Magnesium and Zinc

et al. 2022

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Calculation of intersubband absorption in ZnO/ZnMgO asymmetric double quantum wells

2022

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Facile synthesis of ZnO films with anisotropic preferred orientations: An effective strategy for controllable surface and optical property

Wang

et al. 2023

Journal of Alloys and Compounds

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UV electroluminescence emissions from high-quality ZnO/ZnMgO multiple quantum well active layer light-emitting diodes

Abstract: ZnO/ZnMgO MQWs was employed as an active layer to fabricate p-GaN/MQWs/n-ZnO diode by molecular beam epitaxy. It showed sharp and efficient UV emission around 370 nm due to constraint of carriers in high-quality MQWs well layer.

Cited by 9 publications

References 34 publications

Electronic and Optical Properties of Rocksalt Mg1−xZnxO and Wurtzite Zn1−xMgxO with Varied Concentrations of Magnesium and Zinc

Electronic and Optical Properties of Rocksalt Mg1−xZnxO and Wurtzite Zn1−xMgxO with Varied Concentrations of Magnesium and Zinc

Calculation of intersubband absorption in ZnO/ZnMgO asymmetric double quantum wells

Facile synthesis of ZnO films with anisotropic preferred orientations: An effective strategy for controllable surface and optical property

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