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Optical Properties of Semiconductor Colloidal Quantum Wells

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Part of the NATO Science for Peace and Security Series B: Physics and Biophysics book series (NAPSB)

Abstract

In this chapter we overview recent achievements in the synthesis and investigation of optical properties of the new type of quantum-sized semiconductor nanocrystals – 2D nanoplatelets. Thin, atomically flat AIIBVI nanoplatelets prepared by colloidal chemistry routes are good model objects for studying optical properties of 2D semiconductor structures. Due to their discrete thickness, nanoplatelets exhibit spectrally narrow excitonic optical transitions in absorption and photoluminescence. Large lateral size of semiconductor nanoplatelets results in very efficient light absorption with the molar absorption coefficient an order of magnitude greater than that of 0D quantum dots and 1D nanorods. Sharp excitonic absorption bands of CdSe nanoplatelets allow observation of large electro-optical Quantum Confined Stark effect which is much stronger than in the corresponding nanorods, or quantum dots. Besides binary core CdSe, CdS, CdTe nanoplatelets, more complex CdSe/CdS core-shell and unique core-wings CdSe-CdS, CdSe-CdTe and CdTe-CdSe heteronanoplatelets with type I and type II optical transitions and bright photoluminescence can be synthesized. This expands the field of potential practical applications of nanoplatelets as efficient light convertors and fluorescent markers even further.

Keywords

  • Semiconductor nanoplatelets
  • Colloidal synthesis
  • Structure
  • Optical properties

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  • DOI: 10.1007/978-94-017-7478-9_11
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Acknowledgments

M.A. acknowledges partial support by Belarussian “Chemreagents” program. A.A. and A.P. acknowledge partial support from “Electronics and Photonics” Program.

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Correspondence to Mikhail Artemyev .

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Antanovich, A., Prudnikau, A., Artemyev, M. (2016). Optical Properties of Semiconductor Colloidal Quantum Wells. In: Maffucci, A., Maksimenko, S.A. (eds) Fundamental and Applied Nano-Electromagnetics. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-7478-9_11

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