Size-selective photoluminescence excitation spectroscopy in CdTe quantum dots

Yury Rakovich; Laura Walsh; Louise Bradley; John F. Donegan; Dmitri Talapin; Andrey Rogach; Alexander Eychmueller

doi:10.1117/12.463693

27 August 2003 Size-selective photoluminescence excitation spectroscopy in CdTe quantum dots

Yury Rakovich, Laura Walsh, Louise Bradley, John F. Donegan, Dmitri Talapin, Andrey Rogach, Alexander Eychmueller

Proceedings Volume 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications; (2003) https://doi.org/10.1117/12.463693
Event: OPTO Ireland, 2002, Galway, Ireland

Abstract

We present a photoluminescence and photoluminescence excitation study of CdTe quantum dots, prepared via a novel organometallic approach. The global photoluminescence (excited at the energy above the absorption edge) showed a red shift of 75 meV with respect to the first absorption peak. This band edge emission was found to be strongly dependent on the excitation photon. Resonant emission spectra showed a pronounced spectral shift and line narrowing with decreasing excitation energy. The resonant Stokes shifts were extracted from photoluminescence and photoluminescence excitation data. The minimum magnitude of the resonant Stokes shift of 14 meV was obtained at room temperature.

Citation Download Citation

Yury Rakovich, Laura Walsh, Louise Bradley, John F. Donegan, Dmitri Talapin, Andrey Rogach, and Alexander Eychmueller "Size-selective photoluminescence excitation spectroscopy in CdTe quantum dots", Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); https://doi.org/10.1117/12.463693

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