ZnO-based deep-ultraviolet light-emitting devices

Lu, Ying-Jie; Shi, Zhifeng; Shan, Chongxin; Shen, Dezhen

doi:10.1088/1674-1056/26/4/047703

Cited by 41 publications

(18 citation statements)

References 68 publications

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“…By combining the band‐gaps from ultraviolet–visible absorption spectra and VBM data from UPS spectra, the energy levels of four functional layers were calculated and the schematic band alignment was drawn with respect to the vacuum level (Figure b) assuming that there are no imperfections at the heterointerfaces. In the present case, the ZnO NWs could be deemed as an electron‐providing layer and a transparent photon guider . The thin MgZnO layer with a n‐type conductivity serves as the electron‐injection and hole‐blocking layer in virtue of its matched electron affinity with CsPbBr 3 and a relatively deep valence band energy level, as well as a spacer placed between Au NPs and emissive CsPbBr 3 QDs to avoid the emission quenching.…”

Section: Resultsmentioning

confidence: 99%

Localized Surface Plasmon Enhanced All‐Inorganic Perovskite Quantum Dot Light‐Emitting Diodes Based on Coaxial Core/Shell Heterojunction Architecture

Shi

et al. 2018

Adv Funct Materials

134

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This work presents a strategy of combining the concepts of localized surface plasmons (LSPs) and core/shell nanostructure configuration in a single perovskite light-emitting diode (PeLED) to addresses simultaneously the emission efficiency and stability issues facing current PeLEDs' challenges. Wide bandgap n-ZnO nanowires and p-NiO are employed as the carrier injectors, and also the bottom/upper protection layers to construct coaxial core/shell heterostructured CsPbBr 3 quantum dots LEDs. Through embedding plasmonic Au nanoparticles into the device and thickness optimization of the MgZnO spacer layer, an emission enhancement ratio of 1.55 is achieved. The best-performing plasmonic PeLED reaches up a luminance of 10 206 cd m −2 , an external quantum efficiency of ≈4.626%, and a current efficiency of 8.736 cd A −1 . The underlying mechanisms for electroluminescence enhancement are associated with the increased spontaneous emission rate and improved internal quantum efficiency induced by exciton-LSP coupling. More importantly, the proposed PeLEDs, even without encapsulation, present a substantially improved operation stability against water and oxygen degradation (30-day storage in air ambient, 85% humidity) compared with any previous reports. It is believed that the experimental results obtained will provide an effective strategy to enhance the performance of PeLEDs, which may push forward the application of such kind of LEDs.

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Section: Resultsmentioning

confidence: 99%

Localized Surface Plasmon Enhanced All‐Inorganic Perovskite Quantum Dot Light‐Emitting Diodes Based on Coaxial Core/Shell Heterojunction Architecture

Shi

et al. 2018

Adv Funct Materials

134

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“…Semiconducting materials in group II–VI and III–V generally possess WZ or ZB structure and are well known for their excellent optical and electronic properties [ 60 , 61 ]. They have been widely utilized for the applications of electronic and optoelectronic devices and their piezoelectric properties have been recently investigated.…”

Section: 1d Piezoelectric Materialsmentioning

confidence: 99%

1D Piezoelectric Material Based Nanogenerators: Methods, Materials and Property Optimization

Sun

Wei

et al. 2018

Nanomaterials

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Due to the enhanced piezoelectric properties, excellent mechanical properties and tunable electric properties, one-dimensional (1D) piezoelectric materials have shown their promising applications in nanogenerators (NG), sensors, actuators, electronic devices etc. To present a clear view about 1D piezoelectric materials, this review mainly focuses on the characterization and optimization of the piezoelectric properties of 1D nanomaterials, including semiconducting nanowires (NWs) with wurtzite and/or zinc blend phases, perovskite NWs and 1D polymers. Specifically, the piezoelectric coefficients, performance of single NW-based NG and structure-dependent electromechanical properties of 1D nanostructured materials can be respectively investigated through piezoresponse force microscopy, atomic force microscopy and the in-situ scanning/transmission electron microcopy. Along with the introduction of the mechanism and piezoelectric properties of 1D semiconductor, perovskite materials and polymers, their performance improvement strategies are summarized from the view of microstructures, including size-effect, crystal structure, orientation and defects. Finally, the extension of 1D piezoelectric materials in field effect transistors and optoelectronic devices are simply introduced.

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“…Wurtzite is the most thermodynamically stable form of zinc oxide at ambient conditions. The materials exist unique optical and electrical properties in their nanoscale order and these are becoming responsible for potential applications in the field of solar cell (Saboor et al 2019), laser diode (Deng et al 2020), photocatalysis (Das et al 2018), light emitting device (Lu et al 2017).Zinc Oxide is considered to be one of the attractive semiconductors in the field of photocatalysis for the mineralization of organic dye in water as compared to TiO2 (Shinde et al 2017,Li et al 2009). The high quantum efficiency and the capability to absorb large faction of the solar spectrum are the discernible reasons which lead ZnO to become more novel material for wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of ZnO Nanoparticles Using Water Extract of Waste Coconut Husk and Photocatalytic Activity

Baglari

Brahma

Gautam

et al. 2021

Preprint

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Here, we report the synthesis of highly photoactive zinc oxide nanoparticles using water extract of waste coconut husk ash as a precipitating agent in a green approach which is a potential source of natural alkaline media. The formation of zinc oxide nanoparticles at different pH of the solution of coconut husk ash was confirmed through powder XRD, SEM-EDX, UV-Vis, FTIR and photoluminescence spectroscopy. The photocatalytic performance of the samples was evaluated through the degradation of methylene blue (MB)and methyl orange (MO) under solar irradiation which undergoes degradation around 98% and 56% within 120 min, respectively. The high photocatalytic activity and rate constant could be attributed to the large surface area due to small particle size that could provide quicker photon absorption and reduction of charge carrier recombination. This current work introduces a new method to reduce energy consumption for the synthesis of highly photoactive low-cost zinc oxide nanoparticles.

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ZnO-based deep-ultraviolet light-emitting devices

Cited by 41 publications

References 68 publications

Localized Surface Plasmon Enhanced All‐Inorganic Perovskite Quantum Dot Light‐Emitting Diodes Based on Coaxial Core/Shell Heterojunction Architecture

Localized Surface Plasmon Enhanced All‐Inorganic Perovskite Quantum Dot Light‐Emitting Diodes Based on Coaxial Core/Shell Heterojunction Architecture

1D Piezoelectric Material Based Nanogenerators: Methods, Materials and Property Optimization

Stabilization of ZnO Nanoparticles Using Water Extract of Waste Coconut Husk and Photocatalytic Activity

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