Impact of Mn-dopant concentration in observing narrowing of band-gap, urbach tail and paramagnetism in anatase TiO2 nanocrystals

2019 ◽  
Vol 43 (37) ◽  
pp. 14786-14799 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Guruprasad Mandal ◽  
M. Vasundhara
Keyword(s):  
Band Gap ◽  
Dilute Magnetic Semiconductor ◽  
Dopant Concentration ◽  
Magnetic Semiconductor ◽  
Anatase Tio2 ◽  
Potential Candidate ◽  
Tio2 Nanocrystals ◽  
Urbach Tail ◽  
Mn Doped ◽  
Mn Dopant

In addition to the numerous applications of Mn-doped TiO2, it could be a potential candidate as a dilute magnetic semiconductor.

scholarly journals Defect mediated mechanism in undoped, Cu and Zn-doped TiO2 nanocrystals for tailoring the band gap and magnetic properties

RSC Advances ◽  
2018 ◽  
Vol 8 (73) ◽  
pp. 41994-42008 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Shubhra Dash ◽  
Ajit K. Patra ◽  
Guruprasad Mandal ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Band Gap ◽  
Dilute Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Magnetic Behavior ◽  
Semiconductor Materials ◽  
Magnetic Element ◽  
Tio2 Nanocrystals ◽  
Doped Tio2 ◽  
Cu And Zn

Oxide based dilute magnetic semiconductor materials are of great interest and this study focusses on the optical and magnetic behavior of non-magnetic element doped TiO2 nanocrystals which provides a significant reduction in bandgap with enhanced magnetization.

Optical and Magnetic Studies of Electrospun Mn-Doped SnO2 Hollow Nanofiber Dilute Magnetic Semiconductor

2013 ◽  
Vol 13 (8) ◽  
pp. 5391-5400 ◽  
Author(s):  
P. Mohanapriya ◽  
Clastin I. Sathish ◽  
R. Pradeepkumar ◽  
Hiroyo Segawa ◽  
Kazunari Yamaura ◽  
...  
Keyword(s):  
Dilute Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Magnetic Studies ◽  
Hollow Nanofiber ◽  
Mn Doped

Significant reduction in the optical band-gap and defect assisted magnetic response in Fe-doped anatase TiO2 nanocrystals as dilute magnetic semiconductors

2019 ◽  
Vol 43 (15) ◽  
pp. 6048-6062 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Guruprasad Mandal ◽  
Anupama Chanda ◽  
M. Vasundhara
Keyword(s):  
Band Gap ◽  
Optical Band Gap ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Magnetic Behavior ◽  
Anatase Tio2 ◽  
Magnetic Response ◽  
Tio2 Nanocrystals

The nature of BMPs, whether overlapped or isolated, determines the magnetic behavior of Fe-doped TiO2.

Observation of Optical Band-Gap Narrowing and Enhanced Magnetic Moment in Co-Doped Sol–Gel-Derived Anatase TiO2 Nanocrystals

2018 ◽  
Vol 122 (46) ◽  
pp. 26592-26604 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Guruprasad Mandal ◽  
Geeta R. Mutta ◽  
Anupama Chanda ◽  
...  
Keyword(s):  
Band Gap ◽  
Magnetic Moment ◽  
Optical Band Gap ◽  
Sol Gel ◽  
Anatase Tio2 ◽  
Tio2 Nanocrystals ◽  
Band Gap Narrowing ◽  
Co Doped

Influence of Doping Concentrations of Sol Gel Derived Zn1-xMnxO Thin Films

2011 ◽  
Vol 403-408 ◽  
pp. 753-757
Author(s):  
Affa Rozana Abdul Rashid ◽  
P. Susthitha Menon ◽  
Sahbudin Shaari
Keyword(s):  
Band Gap ◽  
Annealing Temperature ◽  
Dopant Concentration ◽  
Sol Gel ◽  
Zno Films ◽  
Gap Characteristics ◽  
Doped Zno ◽  
Mn Concentration ◽  
Mn Doped ◽  
Tunable Band Gap

Undoped and Mn doped ZnO films with different percentage of doping concentration (2%, 4%, 6% and 8%) were synthesized by sol gel method with an annealing temperature of 400°C. As to investigate the physical properties and microstructures, the samples are characterized using FESEM. The surface morphology images on the films showed many spherical shaped nanoparticles and separate uniformly. Meanwhile, the optical properties were characterized using UV-Vis where the transmittance and band gap value were affected by certain amount of Mn concentration. These films achieve tunable band gap characteristics by means of changing the dopant concentration. At lower concentration, 2% and 4% of Mn, the band gap is reducing compare to undoped ZnO. At higher doping for 6% and 8% of Mn, the bang gap suddenly increased.

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