Direct and Indirect Control upon the Photonic Band Gap Dispersion in Opals Coated with Gold Nanoparticlesopalgold nanoparticlesband gap dispersionphotonic crystalsThe light reflectance in 3-dimensional metal-dielectric photonic crystals assembled from polyelectrolyte-coated latex spheres infiltrated with gold ...
是不是如果是direct band gap，就能激发光子，从而有荧光效应？而indirect band gap则不能？[Last ...
direct gap前没有band。而且pyrite是直接带隙半导体...或许差距0.04eV太小了，热激发可以克服，所以...
Dong-Kyun Seo, Roald Ho mann,"Direct and indirect band gap types in one- dimensional conjugatedor stacked organic materials", Theor Chem Acc (1999).Seo, D.; Hoffmann, R. Direct and indirect band gap types in one-dimensional conjugated or stacked organic materials. Theor. Chem. Accounts ...
Both direct and indirect band gap recombinations are observed at room temperature around 1.6 and1.8μm. The amplitude of the direct band gap recombination is equivalent to the one of the indirect band gap.关键词: Germanium Band gap Electroluminescence Photonic bandgap materials Doping ...
Indirect-to-Direct Band Gap Crossover in Few-Layer MoTe 2 We study the evolution of the band gap structure in few-layer MoTe2 crystals, by means of low-temperature microreflectance (MR) and temperature-dependent p... IG Lezama,A Arora,A Ubaldini,... - 《Nano Letters》 被引量: 59...
GaP, having a 2.25 eV indirect band gap and a 2.78 eV direct band gap, was investigated as a photocathode more than three decades ago (Nozik, 1976). Despite its promising band gap, GaP degrades (Nozik, 1976) during reactions and generates a low OCP (Voc) of 1.2 V (Allen et al.,...
The electronic band structure of Si along the Γ-L and Γ-X path together with the marked direct and indirect energy gap (bottom panel). The electronic band structure obtained within DFT method for Si is shown in Fig. 2. The most important information that can be extracted from the ...
With decreasing L, the energy interval ΔE between the valence band edge at Γand the VBM increases from 0 to ~70 meV (Fig. 1d); correspondingly, the VBM shifts from Γto about 30% of the Γ-K wave-vector. Thus a direct-to-indirect band gap crossover occurs ...
The change in strain-modified band gap energies in truncated and untruncated InAs quantum dots (QDs) in the GaAs matrix has been comparatively investigated... Hyunho,Shin,Euijoon,... - 《Journal of the Physical Society of Japan》 被引量: 1发表: 2004年 Theoretical investigation to study the...