Long Exciton Dephasing Time and Coherent Phonon Coupling in CsPbBr2Cl Perovskite Nanocrystals

被引：72

作者：

Becker, Michael A. ^{[1
,2
]}

Scarpelli, Lorenzo ^{[3
]}

Nedelcu, Georgian ^{[4
,5
]}

Raino, Gabriele ^{[4
,5
]}

Masia, Francesco ^{[3
]}

Borri, Paola ^{[3
,6
]}

Stoferle, Thilo ^{[1
]}

Kovalenko, Maksym V. ^{[4
,5
]}

Langbein, Wolfgang ^{[3
]}

Mahrt, Rainer F. ^{[1
]}

机构：

[1] IBM Res Zurich, Saumerstr 4, CH-8803 Ruschlikon, Switzerland

[2] Swiss Fed Inst Technol, Opt Mat Engn Lab, CH-8092 Zurich, Switzerland

[3] Cardiff Univ, Sch Phys & Astron, Cardiff CF243AA, S Glam, Wales

[4] Swiss Fed Inst Technol, Dept Chem & Appl Biosci, Inst Inorgan Chem, CH-8093 Zurich, Switzerland

[5] Empa Swiss Fed Labs Mat Sci & Technol, Lab Thin Films & Photovolta, CH-8600 Dubendorf, Switzerland

[6] Cardiff Univ, Sch Biosci, Museum Ave, Cardiff CF10 3AX, S Glam, Wales

来源：

NANO LETTERS | 2018年 / 18卷 / 12期

基金：

英国工程与自然科学研究理事会; 欧盟地平线“2020”;

关键词：

Perovskite; nanocrystals; quantum dots; four wave mixing; photon echo; coherence; T-2; phonons; lead halide; heterodyne detection; LEAD HALIDE PEROVSKITES; PHOTON-ECHOES; QUANTUM; EMISSION; MOLECULES; DYNAMICS; BLINKING; CSPBCL3; CSPBX3; BR;

D O I：

10.1021/acs.nanolett.8b03027

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fully inorganic cesium lead halide perovskite nanocrystals (NCs) have shown to exhibit outstanding optical properties such as wide spectral tunability, high quantum yield, high oscillator strength as well as blinking-free single photon emission, and low spectral diffusion. Here, we report measurements of the coherent and incoherent exciton dynamics on the 100 fs to 10 ns time scale, determining dephasing and density decay rates in these NCs. The experiments are performed on CsPbBr2Cl NCs using transient resonant three-pulse four-wave mixing (FWM) in heterodyne detection at temperatures ranging from 5 to 50 K. We found a low-temperature exciton dephasing time of 24.5 +/- 1.0 ps, inferred from the decay of the photon-echo amplitude at 5 K, corresponding to a homogeneous line width (fwhm) of 54 +/- 5 mu eV. Furthermore, oscillations in the photon-echo signal on a picosecond time scale are observed and attributed to coherent coupling of the exciton to a quantized phonon mode with 3.45 meV energy.

引用

页码：7546 / 7551

页数：6

共 41 条

[1] Bright triplet excitons in caesium lead halide perovskites [J].

Becker, Michael A. ;

Vaxenburg, Roman ;

Nedelcu, Georgian ;

Sercel, Peter C. ;

Shabaev, Andrew ;

Mehl, Michael J. ;

Michopoulos, John G. ;

Lambrakos, Samuel G. ;

Bernstein, Noam ;

Lyons, John L. ;

Stoferle, Thilo ;

Mahrt, Rainer F. ;

Kovalenko, Maksym V. ;

Norris, David J. ;

Raino, Gabriele ;

Efros, Alexander L. .

NATURE, 2018, 553 (7687) :189-+

[2] FEMTOSECOND PHOTON-ECHOES FROM MOLECULES IN SOLUTION [J].

BECKER, PC ;

FRAGNITO, HL ;

BIGOT, JY ;

CRUZ, CHB ;

FORK, RL ;

SHANK, CV .

PHYSICAL REVIEW LETTERS, 1989, 63 (05) :505-507

[3] Photon-correlation Fourier spectroscopy of the trion fluorescence in thick-shell CdSe/CdS nanocrystals [J].

Biadala, L. ;

Frederich, H. ;

Coolen, L. ;

Buil, S. ;

Quelin, X. ;

Javaux, C. ;

Nasilowski, M. ;

Dubertret, B. ;

Hermier, J. -P. .

PHYSICAL REVIEW B, 2015, 91 (08)

[4] Dephasing and Quantum Beating of Excitons in Methylammonium Lead Iodide Perovskite Nanoplatelets [J].

Bohn, Bernhard J. ;

Simon, Thomas ;

Gramlich, Moritz ;

Richter, Alexander F. ;

Polavarapu, Lakshminarayana ;

Urban, Alexander S. ;

Feldmann, Jochen .

ACS PHOTONICS, 2018, 5 (02) :648-654

[5] Exciton dephasing via phonon interactions in InAs quantum dots: Dependence on quantum confinement [J].

Borri, P ;

Langbein, W ;

Woggon, U ;

Stavarache, V ;

Reuter, D ;

Wieck, AD .

PHYSICAL REVIEW B, 2005, 71 (11)

[6] Ultralong dephasing time in InGaAs quantum dots [J].

Borri, P ;

Langbein, W ;

Schneider, S ;

Woggon, U ;

Sellin, RL ;

Ouyang, D ;

Bimberg, D .

PHYSICAL REVIEW LETTERS, 2001, 87 (15) :157401-157401

[7] Identification of the symmetry of phonon modes in CsPbCl3 in phase IV by Raman and resonance-Raman scattering [J].

Calistru, DM ;

Mihut, L ;

Lefrant, S ;

Baltog, I .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (11) :5391-5395

[8] Multiple temperature regimes of radiative decay in CdSe nanocrystal quantum dots: Intrinsic limits to the dark-exciton lifetime [J].

Crooker, SA ;

Barrick, T ;

Hollingsworth, JA ;

Klimov, VI .

APPLIED PHYSICS LETTERS, 2003, 82 (17) :2793-2795

[9] Strong Exciton-Photon Coupling and Lasing Behavior in All-Inorganic CsPbBr3 Micro/Nanowire Fabry-Perot Cavity [J].

Du, Wenna ;

Zhang, Shuai ;

Shi, Jia ;

Chen, Jie ;

Wu, Zhiyong ;

Mi, Yang ;

Liu, Zhixiong ;

Li, Yuanzheng ;

Sui, Xinyu ;

Wang, Rui ;

Qiu, Xiaohui ;

Wu, Tom ;

Xiao, Yunfeng ;

Zhang, Qing ;

Liu, Xinfeng .

ACS PHOTONICS, 2018, 5 (05) :2051-2059

[10] Continuous-Wave Lasing in Cesium Lead Bromide Perovskite Nanowires [J].

Evans, Tyler J. S. ;

Schlaus, Andrew ;

Fu, Yongping ;

Zhong, Xinjue ;

Atallah, Timothy L. ;

Spencer, Michael S. ;

Brus, Louis E. ;

Jin, Song ;

Zhu, X. -Y. .

ADVANCED OPTICAL MATERIALS, 2018, 6 (02)

← 1 2 3 4 5 →