Second, the dependence of the exciton binding energy on the molecular size is studied by comparing the results obtained for the oligomers to those found for the polymers. As last aspect, the influence of the intermolecular interaction on the exciton binding energies is investigated by applying ...
The electronic band gap is approximated as the difference between the HOMO and the LUMO energies, and the optical gap is generally taken as the first singlet excitation energy [29]. As collected in Table 1, the exciton binding energies (EB) of molecule 3, 4 and 5 are 0.67 eV, 0....
The exciton binding energies in the strained germanium lattice, calculated within the effective mass approximation, are approximately equal and independent of the magnitude of the strain. The separation of the peaks gives for the shear deformation potentials the values b = (2.7 = 0.3) eV/unit (...
The spin-orbit coupling effects drastically reduce the electron and hole effective masses in these systems, which is beneficial for high carrier mobilities and small exciton binding energies.doi:10.1103/PhysRevB.93.085202Weiwei Gao... W Gao,G Xiang,TA Abtew,... - 《Physical Review B》 被引量...
Exciton binding energyQuantum dotOn the basis of model solid theory, the band offsets for aZn1-xinMgxinSe/Zn1-xoutMgxoutSequantum dot structure are determined. The exciton binding energies due to heavy and light holes with the variation of Mg alloy are repo...
We present a joint study of the band offsets and exciton binding energies in Zn1-xCdxSe-ZnSe quantum wells grown by metal-organic vapor-phase epitaxy with cadmium composition ranging up to 22%. The optical-spectroscopy data presented her... F Liaci,P Bigenwald,O Briot,... - 《Physical ...
The binding energy of excitons to ionized shallow donors in a GaAs/AlAs quantum well in the vicinity of the type-I to type-II transition is obtained for im... ICDC Lima,A Ghazali,PD Emmel - 《Physical Review B》 被引量: 2发表: 1996年 Binding energies of the exciton—ionized-donor co...
To compute the exciton binding energies, the researchers calculated the energy difference between the bound exciton and its "free carrier" state. While the former is given by the "optical gap," linked to light absorption and emission, the latter is given by the "transport gap," which denotes...
We investigate the relationship between the electronic band structures and exciton binding energies in semiconductors, employing first-principles calculations based on the density functional theory and the many-body perturbation theory using Green's functions. Our results clearly show that E(b) increases ...
Binding energies and oscillator strengths of excitons in staggered-lineup heterostructures such as type-II quantum wells are calculated by a variational me... A Bellabchara,P Lefebvre,P Christol,... - 《Physical Review B》 被引量: 16发表: 1994年 Exciton binding energy in type-ii gaas-alas...