p-State Luminescence in CdSe Nanoplatelets: Role of Lateral Confinement and a Longitudinal Optical Phonon Bottleneck

被引：71

作者：

Achtstein, Alexander W. ^{[1
]}

Scott, Riccardo ^{[1
]}

Kickhoefel, Sebastian ^{[1
]}

Jagsch, Stefan T. ^{[2
]}

Christodoulou, Sotirios ^{[3
,4
]}

Bertrand, Guillaume H. V. ^{[4
]}

Prudnikau, Anatol V. ^{[5
]}

Antanovich, Artsiom ^{[5
]}

Artemyev, Mikhail ^{[5
]}

Moreels, Iwan ^{[4
]}

Schliwa, Andrei ^{[2
]}

Woggon, Ulrike ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Opt & Atom Phys, Str 17,Juni 135, D-10623 Berlin, Germany

[2] Tech Univ Berlin, Inst Solid State Phys, Str 17,Juni 135, D-10623 Berlin, Germany

[3] Univ Genoa, Dept Phys, Via Dodecaneso 33, IT-16146 Genoa, Italy

[4] Ist Italiano Tecnol, Via Morego 30, IT-16163 Genoa, Italy

[5] Belarusian State Univ, Inst Physicochem Problems, Minsk 220030, BELARUS

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 11期

关键词：

COLLOIDAL NANOPLATELETS; ZINCBLENDE CDSE; SEMICONDUCTORS; ABSORPTION;

D O I：

10.1103/PhysRevLett.116.116802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We evidence excited state emission from p states well below ground state saturation in CdSe nanoplatelets. Size-dependent exciton ground and excited state energies and population dynamics are determined by four independent methods: time-resolved PL, time-integrated PL, rate equation modeling, and Hartree renormalized k center dot p calculations-all in very good agreement. The ground state-excited state energy spacing strongly increases with the lateral platelet quantization. Depending on its detuning to the LO phonon energy, the PL decay of CdSe platelets is governed by a size tunable LO phonon bottleneck, related to the low exciton-phonon coupling, very large oscillator strength, and energy spacing of both states. This is, for instance, ideal to tune lasing properties. CdSe platelets are perfectly suited to control the exciton-phonon interaction by changing their lateral size while the optical transition energy is determined by their thickness.

引用

页数：5

共 27 条

[1] Linear Absorption in CdSe Nanoplates: Thickness and Lateral Size Dependency of the Intrinsic Absorption [J].

Achtstein, Alexander W. ;

Antanovich, Artsiom ;

Prudnikau, Anatol ;

Scott, Riccardo ;

Woggon, Ulrike ;

Artemyev, Mikhail .

JOURNAL OF PHYSICAL CHEMISTRY C, 2015, 119 (34) :20156-20161

[2] Electroabsorption by 0D, 1D, and 2D Nanocrystals: A Comparative Study of CdSe Colloidal Quantum Dots, Nanorods, and Nanoplatelets [J].

Achtstein, Alexander W. ;

Prudnikau, Anatol V. ;

Ermolenko, Maxim V. ;

Gurinovich, Leonid I. ;

Gaponenko, Sergey V. ;

Woggon, Ulrike ;

Baranov, Alexander V. ;

Leonov, Mikhail Yu ;

Rukhlenko, Ivan D. ;

Fedorov, Anatoly V. ;

Artemyev, Mikhail V. .

ACS NANO, 2014, 8 (08) :7678-7686

[3] Electronic Structure and Exciton-Phonon Interaction in Two-Dimensional Colloidal CdSe Nanosheets [J].

Achtstein, Alexander W. ;

Schliwa, Andrei ;

Prudnikau, Anatol ;

Hardzei, Marya ;

Artemyev, Mikhail V. ;

Thomsen, Christian ;

Woggon, Ulrike .

NANO LETTERS, 2012, 12 (06) :3151-3157

[4] Colloidal synthesis and optical properties of type-II CdSe-CdTe and inverted CdTe-CdSe core-wing heteronanoplatelets [J].

Antanovich, A. V. ;

Prudnikau, A. V. ;

Melnikau, D. ;

Rakovich, Y. P. ;

Chuvilin, A. ;

Woggon, U. ;

Achtstein, A. W. ;

Artemyev, M. V. .

NANOSCALE, 2015, 7 (17) :8084-8092

[5] Tight-binding calculations of image-charge effects in colloidal nanoscale platelets of CdSe [J].

Benchamekh, R. ;

Gippius, N. A. ;

Even, J. ;

Nestoklon, M. O. ;

Jancu, J. -M. ;

Ithurria, S. ;

Dubertret, B. ;

Efros, Al. L. ;

Voisin, P. .

PHYSICAL REVIEW B, 2014, 89 (03)

[6] Recombination Dynamics of Band Edge Excitons in Quasi-Two-Dimensional CdSe Nanoplatelets [J].

Biadala, Louis ;

Liu, Feng ;

Tessier, Mickael D. ;

Yakovlev, Dmitri R. ;

Dubertret, Benoit ;

Bayer, Manfred .

NANO LETTERS, 2014, 14 (03) :1134-1139

[7]

Cardona M., 1995, PHYS REV B, V51, P16338

[8] Room-temperature exciton coherence and dephasing in two-dimensional nanostructures [J].

Cassette, Elsa ;

Pensack, Ryan D. ;

Mahler, Benoit ;

Scholes, Gregory D. .

NATURE COMMUNICATIONS, 2015, 6

[9] Anisotropy of electron-phonon interaction in nanoscale CdSe platelets as seen via off-resonant and resonant Raman spectroscopy [J].

Cherevkov, S. A. ;

Fedorov, A. V. ;

Artemyev, M. V. ;

Prudnikau, A. V. ;

Baranov, A. V. .

PHYSICAL REVIEW B, 2013, 88 (04)

[10]

De Sousa F.F., 2010, Journal of Bioscience, V3, P1

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