Determination of InN/Diamond Heterojunction Band Offset by X-ray Photoelectron Spectroscopy

Shi, Kun; Db, Li; Hp, Song; Yang, Guo; Wang, J; Xu, Xiao; Jm, Liu; Al, Yang; Hy, Wei; Zhang, B; Sy, Yang; Xl, Li; Qs, Zhu; Zg, Wang

doi:10.1007/s11671-010-9796-6

Cited by 16 publications

(3 citation statements)

References 31 publications

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“…The XPS measurements were performed at room temperature using a PHI Quantera SXM instrument (Physical Electronics GmbH, Ismaning, Germany) with AlKα (hv = 1486.6 eV) as the X-ray radiation source, which had been carefully calibrated based on the work function and the Fermi level ( E F ). The total energy resolution of this XPS system is approximately 0.5 eV, and the accuracy of the observed binding energy is within 0.03 eV after careful calibration [8]. Before taking the measurements, the XPS apparatus is calibrated by fitting to the Fermi edge of an Ar + -bombarded silver sample.…”

Section: Methodsmentioning

confidence: 99%

Valence band offset of β-Ga2O3/wurtzite GaN heterostructure measured by X-ray photoelectron spectroscopy

et al. 2012

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A sample of the β-Ga2O3/wurtzite GaN heterostructure has been grown by dry thermal oxidation of GaN on a sapphire substrate. X-ray diffraction measurements show that the β-Ga2O3 layer was formed epitaxially on GaN. The valence band offset of the β-Ga2O3/wurtzite GaN heterostructure is measured by X-ray photoelectron spectroscopy. It is demonstrated that the valence band of the β-Ga2O3/GaN structure is 1.40 ± 0.08 eV.

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Section: Methodsmentioning

confidence: 99%

Valence band offset of β-Ga2O3/wurtzite GaN heterostructure measured by X-ray photoelectron spectroscopy

et al. 2012

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“…It is well known that films of noble metals like silver (Ag), deposited by vapor phase deposition onto solid substrates, show dispersed island-like deposits during the early stages of growth making it very difficult to form ultrathin smooth continuous layers. This has been considered as a big challenge, especially towards the use of metals like Ag, whose optical properties are making it very attractive as nanoscopically thin and smooth continuous films for transparent conducting applications in solar energy harvesting devices [1,2]. On the other side of this issue, the highly disperse size and spacing of the Ag islands has precluded the direct use of vapor phase deposition for the synthesis of a spatially dense collection of Ag nanoparticles with well-controlled size.…”

Section: Introductionmentioning

confidence: 99%

Transformation of irregular shaped silver nanostructures into nanoparticles by under water pulsed laser melting

2016

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The ability to easily manufacture nanostructures with a desirable attribute, such as well-defined size and shape, especially from any given initial shapes or sizes of the material, will be helpful towards accelerating the use of nanomaterials in various applications. In this work we report the transformation of discontinuous irregular nanostructures (DIN) of silver metal by rapid heating under a bulk fluid layer. Ag films were changed into DIN by dewetting in air and subsequently heated by nanosecond laser pulses under water. Our findings show that the DIN first ripens into elongated structures and then breaks up into nanoparticles. From the dependence of this behavior on laser fluence we found that under water irradiation reduced the rate of ripening and also decreased the characteristic break-up length scale of the elongated structures. This latter result was qualitatively interpreted as arising from a Rayleigh-Plateau instability modified to yield significantly smaller length scales than the classical process due to pressure gradients arising from the rapid evaporation of water during laser melting. These results demonstrate that it is possible to fabricate a dense collection of monomodally sized Ag nanoparticles with significantly enhanced plasmonic quality starting from the irregular shaped materials. This can be beneficial towards transforming discontinuous Ag films into nanostructures with useful plasmonic properties, that are relevant for biosensing applications.

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“…Conventionally, a random textured contact layer in TF solar cells is employed for light scattering. Now, new light trapping strategies such as diffraction gratings [2][3][4][5], surface plasmons [6][7][8][9][10][11][12] and photonic crystals [13][14][15][16][17] are under exploration to replace current approaches. Only with new light trapping approaches can TF solar cells make still further progress.…”

Section: Introductionmentioning

confidence: 99%

Hybrid light trapping structures in thin-film silicon solar cells

Shi¹,

Wang²,

Li³

et al. 2014

J. Opt.

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Enhancing light absorption in thin-film silicon solar cells is important for improving efficiency and reducing cost. We introduce a hybrid light trapping structure, where front grating and backside Ag nanoparticles are optimized for antireflection and light trapping. The solar cell with this optimized structure yields a photocurrent of 29.7 mA cm−2 within an active layer equivalent thickness of 1 μm, close to the theoretical limit. This approach is robust to various incident angles and is applicable to different thicknesses in the range of a few micrometers. Two other similar hybrid structures are also proved to be effective light trapping schemes. Moreover, we illustrate that the device implementation could be realized in low-cost technologies.

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Determination of InN/Diamond Heterojunction Band Offset by X-ray Photoelectron Spectroscopy

Cited by 16 publications

References 31 publications

Valence band offset of β-Ga2O3/wurtzite GaN heterostructure measured by X-ray photoelectron spectroscopy

Valence band offset of β-Ga2O3/wurtzite GaN heterostructure measured by X-ray photoelectron spectroscopy

Transformation of irregular shaped silver nanostructures into nanoparticles by under water pulsed laser melting

Hybrid light trapping structures in thin-film silicon solar cells

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