Electroluminescence from light-emitting devices based on erbium-doped ZnO/n-Si heterostructures: Enhancement effect of fluorine co-doping

Chen, Jinxin; Zhu, Wen‐Zhang; Gao, Yuhan; Yang, Deren; Ma, Xiangyang

doi:10.1364/oe.27.030919

Cited by 23 publications

(22 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For depositing ZnO:Er or ZnO:(Ti, Er) films, the ZnO target (50 mm in diameter) doped with nominal 0.75 mol % Er 2 O 3 or 5 mol % TiO 2 and 0.75 mol % Er 2 O 3 was utilized. The procedures and conditions for film deposition and subsequent annealing can be referred to those as described in our previous work . Finally, the electrodes of the ZnO:Er/SiO 2 /n + -Si or ZnO:(Ti, Er)/SiO 2 /n + -Si structured LED were prepared according to the procedures adopted in our previous work …”

Section: Methodsmentioning

confidence: 99%

Electroluminescence from Silicon-Based Light-Emitting Devices with Erbium-Doped ZnO Films: Strong Enhancement Effect of Titanium Codoping

Xia

Chen

Zhao

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

We report on the visible and near-infrared electroluminescence (EL) from the light-emitting device (LED) based on the erbium (Er)-doped ZnO (ZnO:Er)/SiO2/n+-Si heterostructure, wherein an ∼10 nm thick SiO2 intermediate layer serves as the energy plateau for producing hot electrons, which come from n+-Si via the trap-assisted tunneling mechanism. These hot electrons excite the doped Er3+ ions by inelastic collision, enabling the Er-related EL from the aforementioned LED. More importantly, by means of codoping the appropriate content of titanium (Ti) into the ZnO:Er film, the aforementioned Er-related emissions can be significantly enhanced. The density functional theory calculations indicate that the Ti-codoping improves rather than degrades the symmetry of the crystal field around the optically active Er3+ ions, hence not increasing the intra-4f transition probabilities of Er3+ ions. However, it is found that Ti-codoping nearly eliminates the segregation of Er3+ ions near the ZnO/SiO2 interface. Moreover, Ti-codoping is derived to result in a number of Zn vacancies, which provide the sites for incorporating Er3+ ions in the ZnO matrix. For the above two reasons, the Ti-codoping promotes the incorporation of optically active Er3+ ions into the ZnO matrix, thus enhancing the EL from the aforementioned LED.

show abstract

Section: Methodsmentioning

confidence: 99%

Electroluminescence from Silicon-Based Light-Emitting Devices with Erbium-Doped ZnO Films: Strong Enhancement Effect of Titanium Codoping

Xia

Chen

Zhao

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…To calculate the scattered quantum-dot-converted elements (QDCEs), we can utilized the equation from Monte Carlo model [27] and apply the same way to measure the phosphor conversion in WLED. The equation below expressed the scattering coefficient and scattering phase function, which can be described as µsca and µsca ( ) respectively:…”

Section: Mie-scattering Analysismentioning

confidence: 99%

The Effects of ZnO particles on the color homogeneity of phosphor-converted high-power white LED light sources

Loan

Anh

2020

IJECE

View full text Add to dashboard Cite

Color homogeneity is one of the goals to continuously improve WLED. Among the methods for enhancing the color uniformity of WLEDs, improving scattering in phosphor layer is considered to be the most effective. In this paper, ZnO is used for that purpose. The results show that ZnO particle size significantly affects scattering in the phosphor layer, which is a vital factor to analyze scattering, scattering sand surface, scattering coefficient and scattered phase function C_sca (D,λ), μ_sca (λ) and ρ(θ,λ). In addition, the concentration of ZnO was also analyzed with values from 2% to 22%. Color homogeneity depends not only on size but also on the concentration of added ZnO. Therefore, color homogeneity control is the control of ZnO size and concentration. The proposed result is 10% ZnO for the highest lumen of LED. With 14% and 500 nm of ZnO particles, ΔCCT reaches the lowest. Depending on the production needs, manufacturers can choose the most appropriate way. However, with both required lumen and ΔCCT, 14% ZnO is suitable for ZnO sizes.

show abstract

“…Among rare-earth elements, erbium (Er) is a common element widely used as a dopant in ZnO due to its unique intra-4f shell transitions . The potential of Er-doped ZnO used for light-emitting devices and sensors has been investigated. The characteristic fluorescence of Er is located in the visible region, and the oxygen-related defects can form via Er doping.…”

Section: Introductionmentioning

confidence: 99%

Sol–Gel-Derived Biodegradable Er-Doped ZnO/Polyethylene Glycol Nanoparticles for Cell Imaging

Chen

Xue

Luo

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Zinc oxide nanoparticles (ZnO NPs) as promising and nontoxic fluorescent labels are currently developed for cell imaging owing to their excellent biocompatibility. However, the low intensity of the emission band and stability of ZnO NPs have restricted their further applications. In this work, 5 mol % rare-earth metal erbium (Er)-doped ZnO nanoparticles with poly(ethylene glycol) (PEG) surface modification (Er-doped ZnO/PEG NPs) are fabricated by the sol–gel method. Their fluorescence characteristics and biodegradation behavior are investigated. The results indicate that the visible photoluminescence of Er-doped ZnO/PEG NPs has been dramatically enhanced by 631.6% compared with that of bare ZnO NPs. After being stored for one month, particle size variation is less than 1 nm, and fluorescence performance can be well retained. Furthermore, the degradation and cytotoxicity results confirm the degradable and biocompatible characteristics of Er-doped ZnO/PEG NPs, thus extending their potential applications for cell imaging.

show abstract

Electroluminescence from light-emitting devices based on erbium-doped ZnO/n-Si heterostructures: Enhancement effect of fluorine co-doping

Cited by 23 publications

References 44 publications

Electroluminescence from Silicon-Based Light-Emitting Devices with Erbium-Doped ZnO Films: Strong Enhancement Effect of Titanium Codoping

Electroluminescence from Silicon-Based Light-Emitting Devices with Erbium-Doped ZnO Films: Strong Enhancement Effect of Titanium Codoping

The Effects of ZnO particles on the color homogeneity of phosphor-converted high-power white LED light sources

Sol–Gel-Derived Biodegradable Er-Doped ZnO/Polyethylene Glycol Nanoparticles for Cell Imaging

Contact Info

Product

Resources

About