Photocharging Dynamics in Colloidal CdS Quantum Dots Visualized by Electron Spin Coherence
- 作者: Yakovlev D.1,2, Feng D.1,3, Pavlov V.2, Rodina A.2, Shornikova E.1,4, Mund J.1, Bayer M.1,2
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隶属关系:
- Experimentelle Physik 2
- Ioffe Institute
- State Key Laboratory of Precision Spectroscopy
- Rzhanov Institute of Semiconductor Physics
- 期: 卷 52, 编号 4 (2018)
- 页面: 548-550
- 栏目: XXV International Symposium “Nanostructures: Physics and Technology”, Saint Petersburg, June 26–30, 2017. Spin Related Phenomena In Nanostructures
- URL: https://journals.rcsi.science/1063-7826/article/view/202984
- DOI: https://doi.org/10.1134/S1063782618040310
- ID: 202984
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详细
We use a time-resolved technique with three laser pulses (pump, orientation and probe) to study the photocharging dynamics with picosecond resolution on a long timescale ranging from ps to ms in CdS colloidal quantum dots. The detection is based on measuring the coherent spin dynamics of electrons, allowing us to distinguish the type of carrier in the dot core (electron or hole). We find that although initially negative photocharging happens because of fast hole trapping on surface states, eventually it evolves to positive photocharging due to electron trapping and hole detrapping. The positive photocharging lasts up to hundreds of microseconds at room temperature.
作者简介
D. Yakovlev
Experimentelle Physik 2; Ioffe Institute
编辑信件的主要联系方式.
Email: dmitri.yakovlev@tu-dortmund.de
德国, Dortmund, 44227; St. Petersburg, 194021
D. Feng
Experimentelle Physik 2; State Key Laboratory of Precision Spectroscopy
Email: dmitri.yakovlev@tu-dortmund.de
德国, Dortmund, 44227; Shanghai, 200062
V. Pavlov
Ioffe Institute
Email: dmitri.yakovlev@tu-dortmund.de
俄罗斯联邦, St. Petersburg, 194021
A. Rodina
Ioffe Institute
Email: dmitri.yakovlev@tu-dortmund.de
俄罗斯联邦, St. Petersburg, 194021
E. Shornikova
Experimentelle Physik 2; Rzhanov Institute of Semiconductor Physics
Email: dmitri.yakovlev@tu-dortmund.de
德国, Dortmund, 44227; Novosibirsk, 630090
J. Mund
Experimentelle Physik 2
Email: dmitri.yakovlev@tu-dortmund.de
德国, Dortmund, 44227
M. Bayer
Experimentelle Physik 2; Ioffe Institute
Email: dmitri.yakovlev@tu-dortmund.de
德国, Dortmund, 44227; St. Petersburg, 194021