Energy-gap variations in semiconductor alloys

Hill, R.

doi:10.1088/0022-3719/7/3/009

Cited by 239 publications

(93 citation statements)

References 17 publications

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“…From the XEOL spectra in Figure 7, there is a tunable red shift in both the band-gap and defect emissions with decreasing S or increasing Se content in the CdS x Se 1Àx nanostructures. It is known that the band-gap of CdS x Se 1Àx alloys can be determined by an interpolation between those of the two binaries (CdS and CdSe) with an additional nonlinear bowing parameter 60 according to the following equation: …”

Section: Experimental Xeol Results and Discussionmentioning

confidence: 99%

Electronic structure and optical properties of CdSxSe1−x solid solution nanostructures from X-ray absorption near edge structure, X-ray excited optical luminescence, and density functional theory investigations

Murphy

Yiu

Ward

et al. 2014

Journal of Applied Physics

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Articles you may be interested in Ca K-edge X-ray absorption fine structure in BaTiO3-CaTiO3 solid solutions J. Appl. Phys. 113, 044106 (2013); 10.1063/1.4784226 In situ near-edge x-ray absorption fine structure spectroscopy investigation of the thermal defunctionalization of graphene oxide J. The electronic structure and optical properties of a series of iso-electronic and iso-structural CdS x Se 1Àx solid solution nanostructures have been investigated using X-ray absorption near edge structure, extended X-ray absorption fine structure, and X-ray excited optical luminescence at various absorption edges of Cd, S, and Se. It is found that the system exhibits compositions, with variable local structure in-between that of CdS and CdSe accompanied by tunable optical band gap between that of CdS and CdSe. Theoretical calculation using density functional theory has been carried out to elucidate the observations. It is also found that luminescence induced by X-ray excitation shows new optical channels not observed previously with laser excitation. The implications of these observations are discussed. V C 2014 AIP Publishing LLC.

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Section: Experimental Xeol Results and Discussionmentioning

confidence: 99%

Electronic structure and optical properties of CdSxSe1−x solid solution nanostructures from X-ray absorption near edge structure, X-ray excited optical luminescence, and density functional theory investigations

Murphy

Yiu

Ward

et al. 2014

Journal of Applied Physics

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“…(2), bowing parameterofb~0.9 eVwhich is still quite small >1.0eV as compared with those of other mixed crystals [32] which indicates that ZnSe and CdSe have a good miscibility [33]. Eq.…”

Section: Xps Results: General Scan and Depth Profilingmentioning

confidence: 87%

Comparison of the properties of composition-tunable CdSe–ZnSe and Zn Cd1−Se nanocrystallites: Single- and double-pot synthesis approach

Sharma

Singh

et al. 2010

Materials Chemistry and Physics

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A B S T R ACTIn this work. a simple. effective and reproducible synthetic route (single-pot (SP) approach) for the preparation of high quality core-shell CdSe-ZnSe quantum dots without the use of any pyrophoric organometallic precursors is presented and their properties are compared with those prepared by the conventional double-pot (OP) approach, Effective surface passivation of stoichiometric. monodispersed. small-sized (~5 nm) CdSe nanocrystallites is achieved by coating them with a ZnSe shell by single-pot approach. The resulting core-shell nanocrystallites exhibit high quantum yield values~11.33%. narrow line-width of the PL band. stable surface-bonds configuration and superior structural properties at lower Zn content (~10at.%). With increasing Zn content (:::20at.%). a composition-tunable emission across the visible spectrum has been demonstrated by a systematic blue-shift in emission wavelength due to the formation ofternary Zn x Cd 1 _ x Se quantum dots with acceptable luminescence properties. Here. contribution to emission process from surface states of nanocrystallites increases with zinc content. The core-shell and ternary QO's formed by different routes are modeled. based on the observations of several complimentary techniques (XPS depth-profiling. PL. UV-VIS absorbance. TEMjSAEO). The improved properties of core-shell CdSe-ZnSe quantum dots with similar zinc content using single-pot synthesis approach as compared to the corresponding samples obtained by double-pot synthesis. is due to betterpassivation effect rendered by thin ZnSe-shell in the SP approach. Their strong luminescence. narrow emission bands and wide colour-tunability makes such quantum dot structures attractive for various scientific and commercial applications.

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“…IGO 의 에너지 띠 간격은 In과 Ga의 화학양론비에 의해 3.7~4.9 eV 사이 의 범위에서 조정될 수 있다 [3,4]. In 2 O 3 는 실온에서 용융점까지의 온 도범위에서는 안정적인 체심 입방 bixbyite 구조(body-centered cubic bixbyite structure)로 결정체를 이룬다.…”

Section: 서 론unclassified

A Study on Indium Gallium Oxide Thin Film Transistors prepared by a Solution-based Deposition Method

Bae¹,

Lee²,

Han³

et al. 2011

Korean Chemical Engineering Research

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Energy-gap variations in semiconductor alloys

Cited by 239 publications

References 17 publications

Electronic structure and optical properties of CdSxSe1−x solid solution nanostructures from X-ray absorption near edge structure, X-ray excited optical luminescence, and density functional theory investigations

Electronic structure and optical properties of CdSxSe1−x solid solution nanostructures from X-ray absorption near edge structure, X-ray excited optical luminescence, and density functional theory investigations

Comparison of the properties of composition-tunable CdSe–ZnSe and Zn Cd1−Se nanocrystallites: Single- and double-pot synthesis approach

A Study on Indium Gallium Oxide Thin Film Transistors prepared by a Solution-based Deposition Method

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