The Effect of Shallow Impurities on the Light Absorption by the Nanocrystals CdS
Keywords:acceptor and donor imputities, exciton, light absorption coefficient, nanocrystal
The energy of quantum transitions of exciton-impurity states in a heterosystem with nanocrystals is calculated. The absorption spectra associated with the indicated transitions are analyzed. It is qualitatively shown that broad luminescence bands in the red region are related to the impurity acceptor states, and the high narrow ones in the violet region to pure excitonic states and excitonic states interacting with the ion of a donor. The satisfactory quantitative agreement of our calculations with experimental data for high energy luminescence bands is obtained.
C.C. Yang, L.C. Liu, S.H. Chang. Eigenstates and fine structure of a hydrogenic impurity in a spherical quantum dot. Phys. Rev. B 58, 1954 (1998). https://doi.org/10.1103/PhysRevB.58.1954
V. Holovatsky, I. Bernik, O. Voitsekhivska. Oscillator strengths of quantum transition in spherical quantum dot GaAs/AlxGa1−As/GaAs/AlxGa1−xAs with on-center donor impurity. Acta Phys. Pol. A 125, (2014). https://doi.org/10.12693/APhysPolA.125.93
V. Holovatsky, O. Makhanets, O. Voitsekhivska. Oscillator strengths of electron quantum transitions in spherical nanosystems with donor impurity in the center. Physica E: Low-Dimensional Systems and Nanostructures 41, 1522 (2009). https://doi.org/10.1016/j.physe.2009.04.027
V.I. Boichuk, I.V. Bilynskyi, R.Ya. Leshko, L.M. Turyanska. The effect of the polarization charges on the optical properties of a spherical quantum dot with an off-central hydrogenic impurity. Physica E: Low-Dimensional Systems and Nanostructures 44, 476 (2011). https://doi.org/10.1016/j.physe.2011.09.025
V.I. Boichuk, I.V. Bilynskyi, R.Ya. Leshko, L.M. Turyanska. Optical properties of a spherical quantum dot with two ions of hydrogenic impurity. Physica E: Low-Dimensional Systems and Nanostructures 54, 281 (2013). https://doi.org/10.1016/j.physe.2013.07.003
V.I. Boichuk, R.Ya. Leshko, I.V. Bilynskyi, L.M. Turyanska. Off-central acceptor impurity in a spherical quantum dot. Cond. Matt. Phys. 15, 33702 (2012). https://doi.org/10.5488/CMP.15.33702
V.I. Boichuk, R.Ya. Leshko, D.S. Karpyn. Analysis of the effect of polarization traps and shallow impurities on the interlevel light absorption of quantum dots. Cond. Matt. Phys. 20, 43704 (2017). https://doi.org/10.5488/CMP.20.43704
V.A. Holovatsky, I.B. Frankiv. Oscillator strength of quantum transition in multi-shell quantum dots with impurity. J. Optoelectr. Adv. Mater. 15, 88 (2013).
G. Rezaei, M.R.K. Vahdani, B. Vaseghi. Nonlinear optical properties of a hydrogenic impurity in an ellipsoidal finite potential quantum dot. Current Appl. Phys. 11, 176 (2011). https://doi.org/10.1016/j.cap.2010.07.002
A. H¨asselbarth, A. Eychm¨uller, H. Weller. Detection of shallow electron traps in quantum sized CdS by fluorescence quenching experiments. Chem. Phys. Lett. 203, 271 (1993). https://doi.org/10.1016/0009-2614(93)85400-I
D.V. Korbutyak, S.V. Tokarev, S.I. Budzulyak, A.O. Kuryk, V.P. Klad'ko, Yu.O. Polishchuk, O.M. Shevchuk, G.A. Il'chuk, V.S. Tokarev. Optical and structural defect characteristics of nanocrystals CdS:Cu and CdS:Zn synthesized in polymeric matrices. Fiz. Khim. Tv. Tila 14, 222 (2013).
A.I. Savchuk, I.D. Stolyarchuk, T.A. Savchuk, M.M. Smolinsky, O.A. Shporta, L.M. Shynkura. Monitoring of incorporation of magnetic ions into II–VI semiconductor nanocrystals by optical and magneto-optical spectroscopy. Thin Solid Films 541, 79 (2013). https://doi.org/10.1016/j.tsf.2012.10.127
D.V. Korbutyak, O.V. Kovalenko, S.I. Budzulyak et al. Light-emitting properties of quantum dots in semiconductor compounds A2B6. Ukr. Fiz. Zh. Oglyady 7, 48 (2012).
D.F. Fanga, Z.M. Zhangb, Z.P. Wangb, Z.J. Dinga. Photoluminescence of CdS/ZnS core/shell quantum dots. Physics Procedia 32, 920 (2012). https://doi.org/10.1016/j.phpro.2012.03.657
A. Medvid, V.G. Litovchenko, D. Korbutjak, S.G. Krilyuk, L.L. Fedorenko, Y. Hatanaka. Influence of laser radiation on photoluminescence of CdTe Radiation Measurements 33, 725 (2001). https://doi.org/10.1016/S1350-4487(01)00092-0
G. Bastard. Wave Mechanics Applied to Semiconductor Heterostructures (Les Editions de Physique, 1988).
I.M. Kupchak, D.V. Korbutyak, S.M. Kalytchuk. The Stokes shift in quantum dots in CdTe. Zh. Fiz. Doslid. 14, 2701 (2010).
Al.L. Efros, M. Rosen. Band-edge exciton in quantum dots of semiconductors with a degenerate valence band: Dark and bright exciton states Phys. Rev. B 54, 4843 (1996). https://doi.org/10.1103/PhysRevB.54.4843
V.I. Boichuk, I.V. Bilynskyi, I.O. Shakleina, I. Kogoutiouk. Dielectric mismatch in finite barrier cubic quantum dots. Physica E: Low-Dimensional Systems and Nanostructures 43, 161 (2010). https://doi.org/10.1016/j.physe.2010.06.031
How to Cite
License to Publish the Paper
The corresponding author and the co-authors (hereon referred to as the Author(s)) of the paper being submitted to the Ukrainian Journal of Physics (hereon referred to as the Paper) from one side and the Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, represented by its Director (hereon referred to as the Publisher) from the other side have come to the following Agreement:
1. Subject of the Agreement.
The Author(s) grant(s) the Publisher the free non-exclusive right to use the Paper (of scientific, technical, or any other content) according to the terms and conditions defined by this Agreement.
2. The ways of using the Paper.
2.1. The Author(s) grant(s) the Publisher the right to use the Paper as follows.
2.1.1. To publish the Paper in the Ukrainian Journal of Physics (hereon referred to as the Journal) in original language and translated into English (the copy of the Paper approved by the Author(s) and the Publisher and accepted for publication is a constitutive part of this License Agreement).
2.1.2. To edit, adapt, and correct the Paper by approval of the Author(s).
2.1.3. To translate the Paper in the case when the Paper is written in a language different from that adopted in the Journal.
2.2. If the Author(s) has(ve) an intent to use the Paper in any other way, e.g., to publish the translated version of the Paper (except for the case defined by Section 2.1.3 of this Agreement), to post the full Paper or any its part on the web, to publish the Paper in any other editions, to include the Paper or any its part in other collections, anthologies, encyclopaedias, etc., the Author(s) should get a written permission from the Publisher.
3. License territory.
The Author(s) grant(s) the Publisher the right to use the Paper as regulated by sections 2.1.1–2.1.3 of this Agreement on the territory of Ukraine and to distribute the Paper as indispensable part of the Journal on the territory of Ukraine and other countries by means of subscription, sales, and free transfer to a third party.
4.1. This Agreement is valid starting from the date of signature and acts for the entire period of the existence of the Journal.
5.1. The Author(s) warrant(s) the Publisher that:
– he/she is the true author (co-author) of the Paper;
– copyright on the Paper was not transferred to any other party;
– the Paper has never been published before and will not be published in any other media before it is published by the Publisher (see also section 2.2);
– the Author(s) do(es) not violate any intellectual property right of other parties. If the Paper includes some materials of other parties, except for citations whose length is regulated by the scientific, informational, or critical character of the Paper, the use of such materials is in compliance with the regulations of the international law and the law of Ukraine.
6. Requisites and signatures of the Parties.
Publisher: Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine.
Address: Ukraine, Kyiv, Metrolohichna Str. 14-b.
Author: Electronic signature on behalf and with endorsement of all co-authors.