Localization of excitons in space‐charge layers

Киселев, В. А.; Novikov, B. V.; Batyrev, A. S.; Ubushiev, E. A.; Cherednichenko, A. E.

doi:10.1002/pssb.2221350218

Cited by 11 publications

(5 citation statements)

References 9 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We assume that the 650 nm band has a complex structure, including contributions from the exciton and the acceptor center. As was shown in the paper [19], the exciton can be localized in the space charge layer. This corresponds to the discrete levels formation in the potential well.…”

Section: Photoluminescence Spectramentioning

confidence: 64%

Optical properties of Cu-=SUB=-2-=/SUB=-O nanowhiskers

et al. 2022

View full text Add to dashboard Cite

The optical properties of Cu2O nanowhiskers grown by the liquid method with material deposition in an electric field have been studied. The spectral lines forbidden by the selection rules for perfect Cu2O crystals were found in the Raman spectra. The nature of related phonon states is analyzed. In the photoluminescence spectra in the red and near-IR regions, broad bands of defective origin are observed. It was found that the presence of a band at 650 nm (1.9 eV) is a specific feature of the photoluminescence of nanowhiskers. Its properties are studied and possible radiation mechanisms are discussed. In the intrinsic absorption region of nanowhiskers, the photoluminescence band at 572 nm (2.17 eV) associated with band-band transitions is detected. At a low excitation level, the emission of a free exciton n=1 of the yellow exciton series is observed with simultaneous emission of an optical phonon. Keywords: Cu2O, nanowhiskers, Raman, PL, exciton localization.

show abstract

Section: Photoluminescence Spectramentioning

confidence: 64%

Optical properties of Cu-=SUB=-2-=/SUB=-O nanowhiskers

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Мы предполагаем, что полоса 650 нм имеет сложную структуру, включающую вклады экситона и акцепторного центра. Как было показано в работе [19], экситон может локализоваться в слое объемного заряда. Этому соответствует образование в потенциальной яме дискретных уровней.…”

Section: результаты и обсуждениеunclassified

Оптические свойства нановискеров Cu-=SUB=-2-=/SUB=-O

Лабзовская¹,

Новиков²,

Серов³

et al. 2022

Физика И Техника Полупроводников

View full text Add to dashboard Cite

The optical properties of Cu2O nanowhiskers grown by the liquid method with material deposition in an electric field have been studied. The spectral lines forbidden by the selection rules for perfect Cu2O crystals were found in the Raman spectra. The nature of related phonon states is analyzed. In the photoluminescence spectra in the red and near-IR regions, broad bands of defective origin are observed. It was found that the presence of a band at 650 nm (1.9 eV) is a specific feature of the photoluminescence of nanowhiskers. Its properties are studied and possible radiation mechanisms are discussed. In the intrinsic absorption region of nanowhiskers, the photoluminescence band at 572 nm (2.17 eV) associated with band−band transitions is detected. At a low excitation level, the emission of a free exciton n = 1 of the yellow exciton series is observed with simultaneous emission of an optical phonon.

show abstract

“…Here M t = M I N s is the total transfer matrix of a superlattice period d = d s + d I and M I is the 2 × 2 matrix of the insulator M I = cos(q I d I ) −iY I sin(q I d I ) −iZ I sin(q I d I ) cos(q I d I ) (17) where Z I = q I /ω and Y I = 1/Z I . For a superlattice with period d, we invoke Bloch's theorem to write…”

Section: Theorymentioning

confidence: 99%

“…Recent publications have been devoted to studying optical properties of surfaces and films of semiconductors taking into account surface potentials with an attractive as well as a repulsive part [1][2][3][4][5][6]. The potential well formed in this way produces bound states of excitons which manifest themselves as broad peaks in the reflectivity spectra [17,18]. Experimental observations on the effects of bound states on the optical response of semiconductor surfaces have been reported [17,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characteristics of an XeF (C–A) laser emitting visible light as a result of optical pumping by surface-discharge radiation

Zuev¹,

Kashnikov²,

Kozlov³

et al. 1986

Sov. J. Quantum Electron.

View full text Add to dashboard Cite

We study theoretically the effects of exciton bound states on the reflectivity of semiconductor superlattices and thin films. We consider direct gap semiconductors and assume extrinsic potentials near surfaces to model the exciton interactions. Using a multistep method and the 4 × 4 transfer matrix approach, we solve analytically the polariton exciton equations for s-polarized light. Results are presented for the A n=1 excitonic transition of CdS and interpreted in terms of exciton bound states and Fabry-Pérot resonances of the transverse modes. We find that for the superlattice the reflectivity peaks of the high-energy bound states are notably enhanced as compared with the corresponding ones of the single isolated film.

show abstract

Localization of excitons in space‐charge layers

Cited by 11 publications

References 9 publications

Optical properties of Cu-=SUB=-2-=/SUB=-O nanowhiskers

Optical properties of Cu-=SUB=-2-=/SUB=-O nanowhiskers

Оптические свойства нановискеров Cu-=SUB=-2-=/SUB=-O

Characteristics of an XeF (C–A) laser emitting visible light as a result of optical pumping by surface-discharge radiation

Contact Info

Product

Resources

About