The role of rare-earth metal (Y, Ru and Cs)-doped ZnO thin films in NH3 gas sensing performances at room temperature

Sarf, Fatma; Er, İrmak Karaduman; Yakar, Emin; Acar, Selim

doi:10.1007/s10854-020-03554-w

Cited by 20 publications

(8 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energy of the oxygen atoms sent to the surface increases with increasing temperature. However, after a certain critical temperature, the increase in energy values becomes too much, so that oxygen atoms can no longer hold onto the surface [62]. This causes instability and prevents the desired reaction with the target gas and thus, a decrease in sensitivities starts to be observed.…”

Section: H 2 Gas Sensing Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films

Özütok

Yakar

et al. 2021

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

In this study, we report the synthesis of Zn0.075Cu0.025O films by chemical bath deposition to determine the effect of substrate (glass slide or ZnO seed layer) on the structural and H2 gas sensing properties of the produced films. The crystal phase, structural topography, surface morphology and functional groups of the as-synthesized films as well as H2 gas sensing properties were investigated. Although both films have a hexagonal wurtzite structure, ZnO seed layer-based Zn0.075Cu0.025O film is more crystalline than glass slide-based Zn0.075Cu0.025O films. ZnO seed layer-based Zn0.075Cu0.025O films exhibited much more nanorod and less nanosphere forms compared to glass slide-based Zn0.075Cu0.025O films. EDX analysis and Raman spectra of both samples confirmed the presence of defects in Cu:ZnO samples. ZnO seed layer-based sensors showed higher response (140%) and lower operating temperature (80°C) compared to glass slide-based sensors (87% response and 140°C operating temperature). The most important thing to note here is that the fabricated sensors exhibited high response at room temperature. The responses at room temperature was found as 46% and 23% for the ZnO seed layer-based and glass slide-based sensors, respectively. Sensors operating at room temperature are especially important for commercial applications.

show abstract

Section: H 2 Gas Sensing Propertiesmentioning

confidence: 99%

“…Therefore, each sensor material has a unique operating temperature. In addition, the improved gas response of the Cu-doped ZnO samples might be due to the effects of the Cu ions on the ZnO surface properties, defects, and the large oxygen vacancy concentration [62].…”

Section: H 2 Gas Sensing Propertiesmentioning

confidence: 99%

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films

Özütok

Yakar

et al. 2021

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are several Ru compounds in the literature. Ruthenium (III) chloride is one of them and used to produce Ru-doped ZnO thin lms in some studies [20][21][22][23]. Vettumperumal et al [20] prepared nanocrystalline Ru-doped ZnO thin lm using sol-gel spin-coating with Ruthenium (III) chloride and investigated structural properties and UV characteristics.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Doping Perimidine Ruthenium Complexes on Structural, Optic, and Residual Stress Properties of ZnO Thin Films

Demircan

Açıkgöz²,

Yalçın³

et al. 2022

Braz J Phys

View full text Add to dashboard Cite

Novel perimidine ruthenium complexes ([Ru(L1-2)(p-cymene)Cl]Cl) were synthesized and these synthesized Ruthenium (Ru) complexes were added to ZnO at content of 2, 4, 6 wt.% to fabricate Rudoped ZnO thin lms by the sol-gel spin-coating method. These lms were characterized using XRD, SEM, FT-IR, UV-Vis, and Photoluminescence (PL) spectra. All of the lms possessed a hexagonal wurtzite structure, according to XRD data. The observed stress was compressive, except for the A4 sample, and ranged from 0.21 GPa to 2.117 GPa as the ruthenium content increased from 0-6%. Residual stress values of Ru-doped ZnO thin lms showed a lower value than pure ZnO lm. It was obtained that the crystalline quality tended to improve as well as lower residual stress with increasing Ru amount. In the visible range, all the lms exhibited approximately transmittance greater than 70%. Further, the optical bandgap was 3.20 eV for pure ZnO and all Ru-doped lms' bandgap had between 2.76 and 3.18 eV. This research shows that new high conjugated structures are promising as dopant materials for the ZnO thin lm, and good crystalline and optical properties could be obtained from the Ru doped ZnO lms prepared by sol-gel for nano-optoelectronic devices.

show abstract

“…The rare earth elements (i.e., lanthanides) could be considered as active cocatalysts and dopants for the improvement of new substances with appealing gas-sensing applications because of their 7f orbitals awarding special electronic properties [17][18][19][20][21][22][23][24][25]. Zhong et al [17] fabricated Eu 2 O 3 -doped In 2 O 3 using the sol-gel method for detecting H 2 S gas.…”

Section: Introductionmentioning

confidence: 99%

“…Ortega et al [20] fabricated Eu 2 O 3 -doped CeO 2 for sensing CO gas. Er et al [21] fabricated rare earth metals (Y, Ru and Cs)-doped ZnO thin films for sensing NH 3 gas at room temperature. Jing et al [22] fabricated a PANI/Eu 3+ nanofiber for sensing NH 3 gas.…”

Section: Introductionmentioning

confidence: 99%

Electrical and Humidity-Sensing Properties of EuCl2, Eu2O3 and EuCl2/Eu2O3 Blend Films

Choy

2021

Chemosensors

View full text Add to dashboard Cite

Impedance-type humidity sensors based on EuCl2, Eu2O3 and EuCl2/Eu2O3 blend films were fabricated. The electrical properties of the pure EuCl2 and Eu2O3 films and EuCl2/Eu2O3 blend film that was blended with different amounts of EuCl2 were investigated as functions of relative humidity. The influences of the EuCl2 to the humidity-sensing properties (sensitivity and linearity) of the EuCl2/Eu2O3 blend film were thus elucidated. The impedance-type humidity sensor that was made of a 7 wt% EuCl2/Eu2O3 blend film exhibited the highest sensitivity, best linearity, a small hysteresis, a fast response time, a small temperature coefficient and long-term stability. The complex impedance plots were used to elucidate the role of ions in the humidity-sensing behavior of the EuCl2/Eu2O3 blend film.

show abstract

The role of rare-earth metal (Y, Ru and Cs)-doped ZnO thin films in NH3 gas sensing performances at room temperature

Cited by 20 publications

References 43 publications

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films

The Influence of Doping Perimidine Ruthenium Complexes on Structural, Optic, and Residual Stress Properties of ZnO Thin Films

Electrical and Humidity-Sensing Properties of EuCl2, Eu2O3 and EuCl2/Eu2O3 Blend Films

Contact Info

Product

Resources

About

The role of rare-earth metal (Y, Ru and Cs)-doped ZnO thin films in NH3 gas sensing performances at room temperature

Cited by 20 publications

References 43 publications

Substrate critical effect on the structural and H2Gas sensing characteristics of solution-processed Zn0.075Cu0.025O films

Substrate critical effect on the structural and H2Gas sensing characteristics of solution-processed Zn0.075Cu0.025O films

The Influence of Doping Perimidine Ruthenium Complexes on Structural, Optic, and Residual Stress Properties of ZnO Thin Films

Electrical and Humidity-Sensing Properties of EuCl2, Eu2O3 and EuCl2/Eu2O3 Blend Films

Contact Info

Product

Resources

About

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films

Substrate critical effect on the structural and H₂Gas sensing characteristics of solution-processed Zn_0.075Cu_0.025O films