Research output: Contribution to journal › Article › peer-review
Photoluminescence spectra of CdTe multi-quantum wells sandwiched by ultrathin MnTe layers and their temperature dependence. / Iwamitsu, Kazunori; Hatada, Kyosuke; Ichigozaki, Syou; Hatada, Naoki; Shimamoto, Tomoshige; Akai, Ichiro; Serov, Aleksei Yu; Filosofov, Nikolai G.; Karczewski, Grzegorz; Agekian, Vadim F.
In: Journal of Luminescence, Vol. 169, 01.2016, p. 665-668.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Photoluminescence spectra of CdTe multi-quantum wells sandwiched by ultrathin MnTe layers and their temperature dependence
AU - Iwamitsu, Kazunori
AU - Hatada, Kyosuke
AU - Ichigozaki, Syou
AU - Hatada, Naoki
AU - Shimamoto, Tomoshige
AU - Akai, Ichiro
AU - Serov, Aleksei Yu
AU - Filosofov, Nikolai G.
AU - Karczewski, Grzegorz
AU - Agekian, Vadim F.
N1 - Funding Information: This work was supported by a research grant from The Murata Science Foundation and a research Grant 11.37.646.2013 from Saint-Petersburg State University. Publisher Copyright: © 2015 Elsevier B.V. Copyright: Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2016/1
Y1 - 2016/1
N2 - To study the energy transfer (ET) between the Mn2+ intra-center luminescence (IL) state and the band state in CdTe quantum wells (QWs), we studied the temperature dependences of the photoluminescence (PL) spectra of the CdTe multi-QWs sandwiched by ultrathin MnTe layers and found an anomalous thermal variation of their PL intensities. With elevating temperature, the PL intensities of the thinner QWs having 4 and 8 monolayers (MLs) remain at rather high temperatures than 100 K despite the PL of the thicker QWs disappears rapidly. In the thinner QWs, the PL bands appear in an overlap region with the Mn2+ IL-band and energy transfer is expected between the IL-state and the band states in the thinner QWs. The anomalous thermal variations of the PL intensities can be explained by considering the ET and the role of Mn2+ IL-state as reservoir states against the thermal quenching processes.
AB - To study the energy transfer (ET) between the Mn2+ intra-center luminescence (IL) state and the band state in CdTe quantum wells (QWs), we studied the temperature dependences of the photoluminescence (PL) spectra of the CdTe multi-QWs sandwiched by ultrathin MnTe layers and found an anomalous thermal variation of their PL intensities. With elevating temperature, the PL intensities of the thinner QWs having 4 and 8 monolayers (MLs) remain at rather high temperatures than 100 K despite the PL of the thicker QWs disappears rapidly. In the thinner QWs, the PL bands appear in an overlap region with the Mn2+ IL-band and energy transfer is expected between the IL-state and the band states in the thinner QWs. The anomalous thermal variations of the PL intensities can be explained by considering the ET and the role of Mn2+ IL-state as reservoir states against the thermal quenching processes.
KW - CdTe
KW - MnTe
KW - Energy transfer
UR - http://www.scopus.com/inward/record.url?scp=84949088444&partnerID=8YFLogxK
U2 - 10.1016/j.jlumin.2015.05.006
DO - 10.1016/j.jlumin.2015.05.006
M3 - Article
VL - 169
SP - 665
EP - 668
JO - Journal of Luminescence
JF - Journal of Luminescence
SN - 0022-2313
ER -
ID: 7546883