Emission Kinetics of Surface (Bi)Excitons in ZnO Thin Films

Переведенное название: Кинетика излучения поверхностных (Bi) экситонов в тонких пленках ZnO

I. Kh Akopyan, M.É. Labzovskaya, B. V. Novikov, V. G. Talalaev, J. W. Tomm, J. Schilling

Результат исследований: Научные публикации в периодических изданияхстатья

Аннотация

The kinetics of near-edge photoluminescence (PL) in ZnO nanofilms prepared by the atomic layer deposition has been investigated. It is established that the kinetics of near-edge PL in 4-nm films is determined to a great extent by surface 2D-exciton (SX) and biexciton (SXX) complexes. The contribution from surface biexcitons is estimated based on a photostimulated change in the surface potential in ZnO films with different thicknesses. Ultrafast dynamics of surface biexcitons in thin films are revealed. It is shown that biexcitons localized near the surface have the shortest radiative lifetime (less than 100 ps) among all bound exciton complexes, which is explained by the large oscillator strength.

Язык оригиналаанглийский
Страницы (с-по)402-407
Число страниц6
ЖурналPhysics of the Solid State
Том61
Номер выпуска3
DOI
СостояниеОпубликовано - 1 мар 2019

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Предметные области Scopus

  • Электроника, оптика и магнитные материалы
  • Физика конденсатов

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