Effects of Sn and Zn Seed Layers on the Electrical Characteristics of Pd/ZnO Thin-Film Schottky Diodes Grown on n-Si Substrates

Somvanshi, Divya; Jit, Satyabrata

doi:10.1109/led.2014.2334473

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…To understand the current transport mechanisms in our fabricated Schottky diodes, ln I vs ln V is plotted as shown in Schottky diodes shows ohmic behaviour indicated by region I where the current is linearly dependent on the voltage (I ∼ V), and the transport mechanism in this case attributed to the charge carriers tunneling between that states at the interface [56,57]. In region II current is exponentially dependent on the voltage (I ∼ exp (V)) and the transport mechanism possibly attributed to the recombination tunneling [56].…”

Section: Uv-vis Transmittance Spectroscopymentioning

confidence: 99%

“…In region II current is exponentially dependent on the voltage (I ∼ exp (V)) and the transport mechanism possibly attributed to the recombination tunneling [56]. Finally, in region III, the current shows power law dependency (I ∼ V 2 ) and the transport mechanism is attributed to the space charge limited current (SCLC) due to the presence of traps at different energies within ZnO band gap [56,57,58].…”

Section: Uv-vis Transmittance Spectroscopymentioning

confidence: 99%

See 1 more Smart Citation

Structural, optical and electrical properties of the fabricated Schottky diodes based on ZnO, Ce and Sm doped ZnO films prepared via wet chemical technique

Ahmed

Meyer

Nel

2019

Materials Research Bulletin

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Section: Uv-vis Transmittance Spectroscopymentioning

confidence: 99%

Section: Uv-vis Transmittance Spectroscopymentioning

confidence: 99%

Structural, optical and electrical properties of the fabricated Schottky diodes based on ZnO, Ce and Sm doped ZnO films prepared via wet chemical technique

Ahmed

Meyer

Nel

2019

Materials Research Bulletin

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“…6d . Currently, few researches related to the ZnO nanostructures/Zn layers have been presented, where Zn layers and ZnO nanostructures were grown by evaporation and hydrothermal method, respectively 34 , 35 . Since evaporation and hydrothermal methods are both the low-temperature processes, these ZnO nanostructures deposited on the evaporated Zn layers are polycrystalline with low crystal qualities.…”

Section: Resultsmentioning

confidence: 99%

Transformation from Film to Nanorod via a Sacrifical Layer: Pulsed Laser Deposition of ZnO for Enhancing Photodetector Performance

2017

Sci Rep

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A novel fabrication method for single crystalline ZnO nanorods by pulsed laser deposition (PLD) using a chemical-bath-deposited ZnS seed layer is proposed. For the substrate temperature (Ts) lower than 700 °C, the PLD-ZnO showed a polycrystalline phase and film-type morphology, resulting from the ZnS seed layer with a cubic phase. However, the ZnS film became a sacrifical layer and single crystalline ZnO(002) nanorods can be achieved at Ts of 900 °C, where ZnS was decomposed to zinc metals and sulfur fumes. The transformation from ZnO film to nanorod microstructure was demonstrated with the change of ZnS layer into Zn grains. Enhanced performance of the metal-semiconductor-metal photodetectors were fabricated with ZnO/ZnS samples grown at Ts of 500, 700, and 900 °C. The responsivities (@1 V and 370 nm) of these three devices were 1.71, 6.35, and 98.67 A/W, while their UV-to-visible discrimination ratios were 7.2, 16.5, and 439.1, respectively. Obviously, a higher light-capturing efficiency was obtained in the 900 °C-grown ZnO/ZnS device owing to its one-dimensional nanostructure with high crystal quality. The results indicate PLD combined with a sacrifical nanostructure is a promising method for obtaining high-quality ZnO nanorods, which paves the way for the fabrication of high performance ZnO-based devices.

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“…ZnO nanostructures include nanoparticles, nanorods, nanowire, nanorings, nanoflakes, nanocombs, nanoflowers, nanosprings and nanobelts [8,9] . Mead et al, 1965Mead et al, -1970, reported the first results on n-type ZnO Schottky contacts [10,11] . Since that time, ZnO-based Schottky diodes attract the keen interest of many researchers.…”

Section: Introductionmentioning

confidence: 99%

Nanoflower ZnO thin-film grown by hydrothermal technique based Schottky diode

2020

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This paper reports the realization of planar Schottky diodes based on nanorod ZnO thin film. The nanorod ZnO thin film was fabricated by hydrothermal technique on boron doped p-type Si (100) substrate. The Ag//ZnO/Al planar diode operating with voltage bias from –3 to 3 V. The I–V characteristics clearly indicate that the devices have rectifying performance. The thermionic emission theory governs the current across the studied Schottky diode. The device achieved a turn-on voltage of 0.9 V, barrier height 0.69 eV and saturation current of 1.2 × 10–6 A. The diode shows a very large ideality factor (n > > 2) which is attributed to high interface trap concentration. The surface topology was investigated by scanning electron microscope (SEM). The structural properties of the nanostructured ZnO thin film were characterized by X-ray diffraction (XRD). The SEM images reveal that the ZnO nanorods grow perpendicular to the substrate with uniformity and high density. The XRD pattern illustrates the dominant peak appearing at (002). This intense peak indicates the c-axis orientated phase of the wurtzite ZnO structure. It demonstrates that the crystals grow uniformly perpendicular to the substrate surface in good agreement with the SEM images.

show abstract

Effects of Sn and Zn Seed Layers on the Electrical Characteristics of Pd/ZnO Thin-Film Schottky Diodes Grown on n-Si Substrates

Cited by 9 publications

References 9 publications

Structural, optical and electrical properties of the fabricated Schottky diodes based on ZnO, Ce and Sm doped ZnO films prepared via wet chemical technique

Structural, optical and electrical properties of the fabricated Schottky diodes based on ZnO, Ce and Sm doped ZnO films prepared via wet chemical technique

Transformation from Film to Nanorod via a Sacrifical Layer: Pulsed Laser Deposition of ZnO for Enhancing Photodetector Performance

Nanoflower ZnO thin-film grown by hydrothermal technique based Schottky diode

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