Ultraviolet electroluminescence from nanostructural SnO2-based heterojunction with high-pressure synthesized Li-doped ZnO as a hole source

Deng, Rui; Zhao, Jie; Zhang, Duanyi; Qin, Jieming; Ye, Bin; Song, Jing; Jiang, Dayong; Li, Yongfeng

doi:10.1016/j.ceramint.2018.11.114

Cited by 7 publications

(3 citation statements)

References 41 publications

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“…In addition, while the peak corresponding to the Sn(200) crystal plane of the S 0 C electrode is the highest, those from S Z C, S 0 MC, and S Z0.5 MC electrodes show relatively consistent height of ( 200) and ( 101 The valance state of Sn was further confirmed by XPS spectra, and the results are shown in Figures 2B-D, 3 and 4. Based on Figures 2C and 3D-F, it can be seen that the peaks located at 495.5 and 487.2 eV match well with the characteristic peaks assigned to Sn 3d 3/2 and Sn 3d 5/2 , respectively, which clearly confirms the formation of Sn(IV) 29,35 on the electrode surface. Two distinct binding energy peaks at 491.7 and 483.1 eV can be observed in Figures 2C and 3D-F, which correspond to Sn 3d 3/2 and Sn 3d 5/2 , respectively, confirming the presence of the Sn(0) species.…”

Section: Resultssupporting

confidence: 61%

Nanoporous structured Sn‐MWCNT/Cu electrodes fabricated by electrodeposition–chemical dezincification for catalytic CO₂ reduction

Shao

Zhang

et al. 2020

Intl J of Energy Research

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A facile method is developed to fabricate nanoporous, structured, Sn-based catalyst electrodes. Sn, Zn, and multiwalled carbon nanotubes (MWCNTs) are coelectrodeposited on a copper substrate, followed by chemical dezincification in NaOH aqueous solution to remove Zn. By controlling variables such as the contents of Zn and MWCNTs, a series of Sn-MWCNT/Cu (S Z MC) electrodes are fabricated. Experimental results show that using such novel S Z MC electrodes can achieve a HCOO − Faradaic efficiency of over 91% at −0.99 V versus RHE for 10 hours in CO 2-saturated 0.5 M KHCO 3 aqueous solution. The high performance is attributed to the addition of MWCNTs and Zn, followed by chemical dezincification to remove Zn and then create vacancies in the catalyst structure, which results in a special porous structure of S Z MC with large surface area. Then ECSA is used for enhancing the catalytic activity and selectivity of HCOO − production, as well as promoting intermediate adsorption and mass transfer.

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Section: Resultssupporting

confidence: 61%

Nanoporous structured Sn‐MWCNT/Cu electrodes fabricated by electrodeposition–chemical dezincification for catalytic CO₂ reduction

Shao

Zhang

et al. 2020

Intl J of Energy Research

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“…11 Besides, the design and fabrication of ZnO-based UV LEDs are still hindered by the lack of facile and efficient synthesis methods of p-type ZnO materials. 12 Among various wide-band-gap semiconductors, tin dioxide (SnO 2 ) has technically important properties such as 3.6 eV band-gap energy and relatively larger exciton binding energy (∼130 meV), 5,8 which promises efficient exciton emission at room temperature and even at higher temperatures. Due to the outstanding optical and electrical properties, SnO 2 has been intensely studied for its applications in solar cells, 13 catalysis, 14 transparent conducting thin films, 15 gas sensors, 16 and other fields.…”

Section: Introductionmentioning

confidence: 99%

“…Low-dimensional light-emitting diodes (LEDs) featuring in the ultraviolet (UV) band are of fundamental interest in many fields, including medical developments, industrial productions, environmental protections, and biological investigations. − Generally, semiconductors with a band gap larger than 3.0 eV (SnO 2 , ZnO, GaN, etc.) are the most promising candidates for fabrication of UV LEDs.…”

Section: Introductionmentioning

confidence: 99%

Highly Monochromatic Ultraviolet LED Based on the SnO₂ Microwire Heterojunction Beyond Dipole-Forbidden Band-Gap Transition

Liu,

Yang,

Sha

et al. 2023

ACS Appl. Mater. Interfaces

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SnO2 has been extensively applied in the fields of optoelectronic devices because of its large band gap, high exciton binding energy, and outstanding optical/electrical properties. However, its applications in ultraviolet light-emitting diodes (LEDs) are still hindered by the dipole-forbidden rule. Herein, the dipole-forbidden rule can be conquered by synthesizing Sb-incorporated SnO2 microwires (SnO2:Sb MWs), which are examined by ultraviolet photoluminescence emitting at 363.2 nm and a line width of 11.3 nm. Subsequently, a highly monochromatic ultraviolet light-emitting diode (LED) based on a SnO2:Sb MW heterojunction was constructed with a p-GaN film serving as the hole supplier. In the LED, the presence of a MgO intermediate layer can modulate carrier transport and recombination path, thus achieving band-edge optical transition in the SnO2:Sb MW. As the LED is modified using Ag nanowires, electrical properties, especially for the hole injection efficiency, were dramatically boosted, contributing significantly to the device high brightness. The LED emits at 365.9 nm and a line width of 12.4 nm. Therefore, we have realized a high-brightness and narrow-band ultraviolet LED with the shortest peak wavelength never seen in previously reported SnO2 LEDs. This work will promote the potential applications of low-dimensional SnO2 optoelectronic devices and provide an effective exemplification to overcome the dipole-forbidden rule in metal-oxide materials with “forbidden” energy gaps.

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Zinc oxide-based light-emitting diodes and lasers

Jangir

Kumari

2021

Nanostructured Zinc Oxide

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Ultraviolet electroluminescence from nanostructural SnO2-based heterojunction with high-pressure synthesized Li-doped ZnO as a hole source

Cited by 7 publications

References 41 publications

Nanoporous structured Sn‐MWCNT/Cu electrodes fabricated by electrodeposition–chemical dezincification for catalytic CO₂ reduction

Nanoporous structured Sn‐MWCNT/Cu electrodes fabricated by electrodeposition–chemical dezincification for catalytic CO₂ reduction

Highly Monochromatic Ultraviolet LED Based on the SnO₂ Microwire Heterojunction Beyond Dipole-Forbidden Band-Gap Transition

Zinc oxide-based light-emitting diodes and lasers

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Ultraviolet electroluminescence from nanostructural SnO2-based heterojunction with high-pressure synthesized Li-doped ZnO as a hole source

Cited by 7 publications

References 41 publications

Nanoporous structured Sn‐MWCNT/Cu electrodes fabricated by electrodeposition–chemical dezincification for catalytic CO2 reduction

Nanoporous structured Sn‐MWCNT/Cu electrodes fabricated by electrodeposition–chemical dezincification for catalytic CO2 reduction

Highly Monochromatic Ultraviolet LED Based on the SnO2 Microwire Heterojunction Beyond Dipole-Forbidden Band-Gap Transition

Zinc oxide-based light-emitting diodes and lasers

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Product

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About

Nanoporous structured Sn‐MWCNT/Cu electrodes fabricated by electrodeposition–chemical dezincification for catalytic CO₂ reduction

Nanoporous structured Sn‐MWCNT/Cu electrodes fabricated by electrodeposition–chemical dezincification for catalytic CO₂ reduction

Highly Monochromatic Ultraviolet LED Based on the SnO₂ Microwire Heterojunction Beyond Dipole-Forbidden Band-Gap Transition