Role of hydrogen in electrical and structural characteristics of bilayer CdTe/Mn diluted magnetic semiconductor thin films

Nehra, S.P.; Jangid, M.K.; Srivastava, Subodh; Kumar, Ankit; Tripathi, Balram; Singh, M.; Vijay, Y.K.

doi:10.1016/j.ijhydene.2009.06.054

Cited by 13 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The polycrystalline thin film of CdTe has been investigated after being exposed to hydrogen gas and found the d. c. conductivity decreases as hydrogen pressure increases. The decrement in the conductivity of thin films may suggest that the reduction of free charge carriers during the hydrogenation of the thin film [31,32].…”

Section: Resultsmentioning

confidence: 99%

Structural, Electrical and Optical Properties of Mg-Ni Thin Films for Hydrogen Storage Applications

Jangid

Jangid²

2022

Trends Sci

View full text Add to dashboard Cite

Using the magnetron sputtering technique, Mg-Ni (150nm) bilayer thin films were deposited onto the simple, and ITO coated glass substrates. To obtain proper mixing and inter diffusion of thin film structure, annealing of the prepared thin films was made at constant temperature 523 K. The surface morphology of thin films confirms the uniform deposition of the Mg-Ni thin films on substrates. The Raman spectroscopy of thin films shows that the intensity of Raman peaks is decreased as the hydrogen pressure increases and variation in the intensity peak confirms the existence of hydrogen in the prepared film. The d.c. conductivity of thin films were observed at different hydrogen pressure (10 - 40 psi) for both the as-deposited and annealed thin films and the variation in the conductivity after hydrogenation was found out. In Uv-Vis spectroscopy, it was found that the optical bandgap of thin films increases with the increase of hydrogen pressure. The deviations in the structural, electrical and optical properties after hydrogenation indicate that Mg-Ni thin films may be used for solid state hydrogen storage applications. HIGHLIGHTS Preparation of Mg-Ni bilayer thin films using magnetron sputtering technique Finding the opportunity to use Mg-Ni bilayer thin film as solid-state hydrogen storage materials Raman spectroscopy for confirming the presence of hydrogen in Mg-Ni bilayer thin films Effect of hydrogen on conductivity and optical energy bandgap of Mg-Ni bilayer thin films GRAPHICAL ABSTRACT

show abstract

Section: Resultsmentioning

confidence: 99%

Structural, Electrical and Optical Properties of Mg-Ni Thin Films for Hydrogen Storage Applications

Jangid

Jangid²

2022

Trends Sci

View full text Add to dashboard Cite

show abstract

“…The strong hybridization between the H-impurity band and the 3d minority spin states of Mn at the Fermi level in the gap results in the FM coupling between the spins of Mn and N [199]. Hydrogen-dopant effects were also observed in some experiments [200][201][202] for DMS material systems. Except for semiconductors, the problem of H embrittlement for high-strength steels and Al alloys is also a crucial issue in modern materials physics [203].…”

Section: Hydrogen Co-doping Effectsmentioning

confidence: 92%

A brief review of co-doping

et al. 2016

View full text Add to dashboard Cite

Dopants and defects are important in semiconductor and magnetic devices. Strategies for controlling doping and defects have been the focus of semiconductor physics research during the past decades and remain critical even today. Co-doping is a promising strategy that can be used for effectively tuning the dopant populations, electronic properties, and magnetic properties. It can enhance the solubility of dopants and improve the stability of desired defects. During the past 20 years, significant experimental and theoretical efforts have been devoted to studying the characteristics of co-doping. In this article, we first review the historical development of co-doping. Then, we review a variety of research performed on co-doping, based on the compensating nature of co-dopants. Finally, we review the effects of contamination and surfactants that can explain the general mechanisms of co-doping.

show abstract

“…That can also be observed in case of viriation in the electrical conductivity of the thin films structure. The conductivity decreases from 3.76× 10 3 Ώ -1 m -1 to 1.10× 10 3 Ώ -1 m -1 as the hydrogen pressure increases [23,24]. Observed I-V curves have been found with less linear portion that might signify the existence of the series resistance which leads to the variation in the barrier heights.…”

Section: I-v Characteristicsmentioning

confidence: 94%

Study on Hydriding Kinetics, Structural Properties and Electrical Conductivity of D.C. Magnetron Sputtered Mg/Al Thin Films

Jangid

Sharma²,

Ray

2022

SSP

Self Cite

View full text Add to dashboard Cite

Mg/Al bilayer thin films were successfully deposited by using D.C. magnetron sputtering technique. To study the effect of hydrogenation on structural, optical and electrical properties of Mg/Al thin films, the hydrogenation of the annealed thin films was done under different hydrogen pressure (15, 30 & 30psi). The structural properties of the films were investigated by Raman spectroscopy and decrease in intensity of Raman peaks with increasing hydrogen pressure was observed; this typically confirms the existence of hydrogen in Mg/Al thin films. The thin film is of semiconducting nature and it was found that the electrical conductivity of the film decreases with increasing hydrogen pressure applied. In the hydriding kinetics of the films, it was seen that the resistivity increased along with hydrogen absorption time. Eventually, it attains the equilibrium stage indicating the hydrogen absorption in the thin films. The rate of absorption of hydrogen increases with the pressure of hydrogen over different time ranges and decreases with the absorption of hydrogen over time.

show abstract

Role of hydrogen in electrical and structural characteristics of bilayer CdTe/Mn diluted magnetic semiconductor thin films

Cited by 13 publications

References 18 publications

Structural, Electrical and Optical Properties of Mg-Ni Thin Films for Hydrogen Storage Applications

Structural, Electrical and Optical Properties of Mg-Ni Thin Films for Hydrogen Storage Applications

A brief review of co-doping

Study on Hydriding Kinetics, Structural Properties and Electrical Conductivity of D.C. Magnetron Sputtered Mg/Al Thin Films

Contact Info

Product

Resources

About