Power-law photoluminescence decay in quantum dots

0438701 - FZÚ 2015 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Král, Karel - Menšík, Miroslav
Power-law photoluminescence decay in quantum dots.
7th International Conference on Low Dimensional Structures and Devices (LDSD. Melville: AIP, 2014 - (HernandezCalderon, I.; Henini, M.), s. 87-90. AIP Conference Proceedings, 1598. ISBN 978-0-7354-1232-3.
[International Conference on Low Dimensional Structures and Devices /7./ (LDSD 2011). Telchac (MX), 22.05.2011-27.05.2011]
Institucionální podpora: RVO:68378271 ; RVO:61389013
Klíčová slova: photoluminescence decay * quantum dots * power-law * electron-phonon interaction * up-conversion
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Some quantum dot samples show a long-time (power-law) behavior of their luminescence intensity decay. This effect has been recently explained as being due to a cooperation of many tunneling channels transferring electrons from small quantum dots with triplet exciton to quantum dots at which the electrons can recombine with the holes in the valence band states. In this work we show that the long-time character of the sample luminescence decay can also be caused by an intrinsic property of a single dot, namely, by a non-adiabatic effect of the electron occupation up-conversion caused by the electron-phonon multiple scattering mechanism.
Trvalý link: http://hdl.handle.net/11104/0242096