Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Intrinsic luminescence and core structure of freshly introduced a-screw dislocations in n-GaN. / Medvedev, O.; Vyvenko, O.; Ubyivovk, E.; Shapenkov, S.; Bondarenko, A.; Saring, P.; Seibt, M.
в: Journal of Applied Physics, Том 123, № 16, 161427, 28.04.2018.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - Intrinsic luminescence and core structure of freshly introduced a-screw dislocations in n-GaN
AU - Medvedev, O.
AU - Vyvenko, O.
AU - Ubyivovk, E.
AU - Shapenkov, S.
AU - Bondarenko, A.
AU - Saring, P.
AU - Seibt, M.
N1 - Conference code: 29
PY - 2018/4/28
Y1 - 2018/4/28
N2 - Dislocations introduced by the scratching or by the indentation of the basal and prismatic surfaces of low-ohmic unintentionally n-type doped GaN crystals were investigated by means of cathodoluminescence and transmission electron microscopy (TEM). A strong luminescence of straight segments of a-screw dislocations was observed in the temperature range of 70-420K. The spectrum of dislocation related luminescence (DRL) consisted of a doublet of narrow lines red shifted by about 0.3 eV with respect to the band gap. TEM revealed dissociated character of the screw dislocations and the formation of extended nodes at their intersection. From the analysis of the DRL spectral doublet temperature, power and strain dependences DRL was ascribed to direct and indirect excitons bound by 1D quantum wells formed by partials and stacking fault (SF) ribbon of dissociated screw dislocation. Published by AIP Publishing.
AB - Dislocations introduced by the scratching or by the indentation of the basal and prismatic surfaces of low-ohmic unintentionally n-type doped GaN crystals were investigated by means of cathodoluminescence and transmission electron microscopy (TEM). A strong luminescence of straight segments of a-screw dislocations was observed in the temperature range of 70-420K. The spectrum of dislocation related luminescence (DRL) consisted of a doublet of narrow lines red shifted by about 0.3 eV with respect to the band gap. TEM revealed dissociated character of the screw dislocations and the formation of extended nodes at their intersection. From the analysis of the DRL spectral doublet temperature, power and strain dependences DRL was ascribed to direct and indirect excitons bound by 1D quantum wells formed by partials and stacking fault (SF) ribbon of dissociated screw dislocation. Published by AIP Publishing.
KW - TRANSMISSION ELECTRON-MICROSCOPE
KW - STACKING-FAULTS
KW - GALLIUM NITRIDE
KW - CATHODOLUMINESCENCE
KW - PHOTOLUMINESCENCE
KW - RECOMBINATION
KW - DEFORMATION
KW - EXCITONS
KW - ENERGY
UR - http://www.mendeley.com/research/intrinsic-luminescence-core-structure-freshly-introduced-ascrew-dislocations-ngan
UR - http://www.scopus.com/inward/record.url?scp=85046107970&partnerID=8YFLogxK
U2 - 10.1063/1.5011368
DO - 10.1063/1.5011368
M3 - статья
VL - 123
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 16
M1 - 161427
Y2 - 30 July 2017 through 3 August 2017
ER -
ID: 28361319