Investigation of charge transport properties in less defective nanostructured ZnO based Schottky diode

Dey, Arka; Layek, Animesh; Roychowdhury, Anirban; Das, Mukunda P.; Datta, Joydeep; Middya, Somnath; Das, Dipankar; Ray, Partha Pratim

doi:10.1039/c4ra16828c

Cited by 116 publications

(126 citation statements)

References 21 publications

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“…The bandgap of the sample is found to be 3.85 eV, which is greater than the bulk ZnO. [32][33][34] Thus, there is a blue shift relative to the peak absorption of bulk ZnO (3.372 eV). [34][35] The energy difference between optical absorption gap (3.372 eV) and photoelectron band gap of ZnO nanoparticles (3.85 eV) is 0.478 eV, Which due to the excitonic binding energy.…”

Section: Resultsmentioning

confidence: 99%

Temperature Dependent and Kinetic Study of the Adsorption of Bovine Serum Albumin to ZnO Nanoparticle Surfaces

Bhunia

Kamilya²,

Saha

2016

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Here, we study the role of temperature for the adsorption of Bovine Serum Albumin to ZnO Nanoparticle Surfaces and the kinetics of the ZnO NPs‐BSA corona by using UV‐vis absorption, DLS, fluorescence spectroscopy. Structures of the synthesized ZnO NPs are studied by XRD, TEM, and FT‐IR measurements. The band gap and crystal size of ZnO suggests the quantum confinement effect. The photoluminescence spectrum of pure ZnO NPs showed shallow deep level blue emission due to various defect states. The Zn–O bond formation was confirmed through Fourier transformed infrared spectroscopic analysis. The crystal unit cell of the nanoparticles is found to be hexagonal. A small red shift of the absorption peak of BSA is observed due to binding of BSA with different concentration of ZnO NPs. The time constants for surface binding and reorganization under four different temperatures showed that the binding decreases and unfolding increases as the temperature increases up to 315 K. Hydrodynamic radius of the bioconjugate under different temperature showed large BSA aggregates at temperature 315 K. The change in energy transfer efficiency (Qeff) between ZnO NPs and BSA with time at room temperature was studied. The quenching in the fluorescence emission of tryptophan (Try) residues in the structure of BSA is static in lower temperature and dynamic in higher temperature. The interaction between Try of BSA and ZnO NPs is exothermic, electrostatic and hydrophobic in nature.

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Section: Resultsmentioning

confidence: 99%

Temperature Dependent and Kinetic Study of the Adsorption of Bovine Serum Albumin to ZnO Nanoparticle Surfaces

Bhunia

Kamilya²,

Saha

2016

ChemistrySelect

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“…The device parameters like Ideality factor, barrier height and series resistance were estimated using equations (4)−(6), which has been extracted from Cheung's method,,

true \frac{boldd boldV}{boldd ((), boldl boldn boldI)} = ((), \frac{η K T}{boldq}) + boldI R_{S}

true boldH ((), I) = boldV - ((), \frac{η K T}{boldq}) boldl boldn ((), \frac{I_{S}}{A A^{^{*}} T^{2}})

true boldH ((), I) = boldI R_{S} + η \emptyset_{B}

…”

Section: Resultsmentioning

confidence: 99%

“…By using the above mentioned theory, the effective carrier mobility has been calculated from the higher voltage region of I vs. V 2 plot (Figure ) by using Mott‐Gurney equation:,,

true boldI = \frac{9 μ_{bolde boldf boldf} ϵ_{0} ϵ_{r} boldA}{8} ((), \frac{{boldV}^{2}}{{boldd}^{3}})

…”

Section: Resultsmentioning

confidence: 99%

A Supramolecular Gel of Oxalic Acid‐Monoethanolamine for Potential Schottky Barrier Diode Application

et al. 2019

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A functional supramolecular gel of oxalic acid and monoethanolamine (OXMEA) has been achieved through direct instant mixing of N,N-dimethyl formamide (DMF) solution of oxalic acid and pure monoethanolamine at room temperature under ambient condition. The rheological analysis established the viscoelastic semi-solid type nature of mechanically stable OXMEA supramolecular gel. The morphological pattern, imaged through field emission scanning electron microscopic investigation, explores the bean-seed like hierarchical architecture of the gel network. The semiconducting property of the gel was verified from band gap energy and conductivity estimation. The electrical charge transport property was also analyzed in the form of OXMEA gel based metal-semiconductor junction thin film device. The obtained nonlinear current-voltage characteristics of the device signify Schottky barrier diode nature of the synthesized gel. Overall, this work has been proof of development of semiconducting electronic device by OXMEA gel based gel medium.

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“…The effective Richardson constant for our fabricated Fe@TETA metallogel-based devices was considered as 32 AK −2 cm −2 . The ideality factor, barrier potential height, and series resistance of our devices were also determined by using eqs 6−8, which were extracted from Cheung's work 69,70…”

Section: ■ Introductionmentioning

confidence: 99%

Triethylenetetramine-Based Semiconducting Fe(III) Metallogel: Effective Catalyst for Aryl–S Coupling

et al. 2020

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A fascinating way to originate a mechanically stable metallogel of ferric ions with metal-coordinating organic ligand triethylenetetramine through direct mixing of their water solutions in a stoichiometric ratio is achieved under ambient conditions. The rheological study established the mechanical property of the Fe(III) metallogel. A cashew-shaped microstructure of the metallogel was observed by FESEM analysis. The electrical property of the Fe(III) metallogel was also carefully scrutinized. The semiconducting features like the Schottky barrier diode property of the Fe(III) metallogel were explored. The catalytic role of the Fe(III) metallogel was also critically explored. The Fe(III) metallogel shows an excellent catalytic property toward the synthesis of aryl thioethers via a C−S coupling reaction under mild reaction conditions without the use of any organic solvent.

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Investigation of charge transport properties in less defective nanostructured ZnO based Schottky diode

Abstract: Positron annihilation approved less amount of defect in ZnO: effect on the performance of Al/ZnO/ITO Schottky diode.

Cited by 116 publications

References 21 publications

Temperature Dependent and Kinetic Study of the Adsorption of Bovine Serum Albumin to ZnO Nanoparticle Surfaces

Temperature Dependent and Kinetic Study of the Adsorption of Bovine Serum Albumin to ZnO Nanoparticle Surfaces

A Supramolecular Gel of Oxalic Acid‐Monoethanolamine for Potential Schottky Barrier Diode Application

Triethylenetetramine-Based Semiconducting Fe(III) Metallogel: Effective Catalyst for Aryl–S Coupling

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