Enhanced Size Selection in Two-Photon Excitation for CsPbBr3 Perovskite Nanocrystals

Junsheng Chen; Pavel Chábera; Torbjörn Pascher; Maria E. Messing; Richard Schaller; Sophie Canton; Kaibo Zheng; Tõnu Pullerits

doi:10.1021/acs.jpclett.7b02178

Enhanced Size Selection in Two-Photon Excitation for CsPbBr₃ Perovskite Nanocrystals

Junsheng Chen, Pavel Chábera, Torbjörn Pascher, Maria E. Messing, Richard Schaller, Sophie Canton, Kaibo Zheng, Tõnu Pullerits

Research output: Contribution to journal › Article › peer-review

Abstract

Cesium lead bromide (CsPbBr₃) perovskite nanocrystals (NCs), with large two-photon absorption (TPA) cross-section and bright photoluminescence (PL), have been demonstrated as stable two-photon-pumped lasing medium. With two-photon excitation, red-shifted PL spectrum and increased PL lifetime is observed compared with one-photon excitation. We have investigated the origin of such difference using time-resolved laser spectroscopies. We ascribe the difference to the enhanced size selection of NCs by two-photon excitation. Because of inherent nonlinearity, the size dependence of absorption cross-section under TPA is stronger. Consequently, larger size NCs are preferably excited, leading to longer excited-state lifetime and red-shifted PL emission. In a broad view, the enhanced size selection in two-photon excitation of CsPbBr₃ NCs is likely a general feature of the perovskite NCs and can be tuned via NC size distribution to influence their performance within NC-based nonlinear optical materials and devices.

Original language	English
Pages (from-to)	5119-5124
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	8
Issue number	20
DOIs	https://doi.org/10.1021/acs.jpclett.7b02178
Publication status	Published - 2017 Oct 19

Subject classification (UKÄ)

Physical Chemistry (including Surface- and Colloid Chemistry)
Condensed Matter Physics (including Material Physics, Nano Physics)

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10.1021/acs.jpclett.7b02178

1 Doctoral Thesis (compilation)

Photophysics of Perovskite Nano- and Microcrystals
Chen, J., 2018 Feb, Lund: Lund University, Faculty of Science, Department of Chemistry, Division of Chemical Physics. 146 p.
Research output: Thesis › Doctoral Thesis (compilation)

Open Access
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National Center for High Resolution Electron Microscopy - ARTEMI Atomic Resolution TEM infrastructure of Sweden
Wallenberg, R. (Manager)
Centre for Analysis and Synthesis
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Cite this

@article{4630a5d384c04a138ff7272c4362aea4,

title = "Enhanced Size Selection in Two-Photon Excitation for CsPbBr3 Perovskite Nanocrystals",

abstract = "Cesium lead bromide (CsPbBr3) perovskite nanocrystals (NCs), with large two-photon absorption (TPA) cross-section and bright photoluminescence (PL), have been demonstrated as stable two-photon-pumped lasing medium. With two-photon excitation, red-shifted PL spectrum and increased PL lifetime is observed compared with one-photon excitation. We have investigated the origin of such difference using time-resolved laser spectroscopies. We ascribe the difference to the enhanced size selection of NCs by two-photon excitation. Because of inherent nonlinearity, the size dependence of absorption cross-section under TPA is stronger. Consequently, larger size NCs are preferably excited, leading to longer excited-state lifetime and red-shifted PL emission. In a broad view, the enhanced size selection in two-photon excitation of CsPbBr3 NCs is likely a general feature of the perovskite NCs and can be tuned via NC size distribution to influence their performance within NC-based nonlinear optical materials and devices.",

author = "Junsheng Chen and Pavel Ch{\'a}bera and Torbj{\"o}rn Pascher and Messing, {Maria E.} and Richard Schaller and Sophie Canton and Kaibo Zheng and T{\~o}nu Pullerits",

year = "2017",

month = oct,

day = "19",

doi = "10.1021/acs.jpclett.7b02178",

language = "English",

volume = "8",

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journal = "Journal of Physical Chemistry Letters",

issn = "1948-7185",

publisher = "The American Chemical Society (ACS)",

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TY - JOUR

T1 - Enhanced Size Selection in Two-Photon Excitation for CsPbBr3 Perovskite Nanocrystals

AU - Chen, Junsheng

AU - Chábera, Pavel

AU - Pascher, Torbjörn

AU - Messing, Maria E.

AU - Schaller, Richard

AU - Canton, Sophie

AU - Zheng, Kaibo

AU - Pullerits, Tõnu

PY - 2017/10/19

Y1 - 2017/10/19

N2 - Cesium lead bromide (CsPbBr3) perovskite nanocrystals (NCs), with large two-photon absorption (TPA) cross-section and bright photoluminescence (PL), have been demonstrated as stable two-photon-pumped lasing medium. With two-photon excitation, red-shifted PL spectrum and increased PL lifetime is observed compared with one-photon excitation. We have investigated the origin of such difference using time-resolved laser spectroscopies. We ascribe the difference to the enhanced size selection of NCs by two-photon excitation. Because of inherent nonlinearity, the size dependence of absorption cross-section under TPA is stronger. Consequently, larger size NCs are preferably excited, leading to longer excited-state lifetime and red-shifted PL emission. In a broad view, the enhanced size selection in two-photon excitation of CsPbBr3 NCs is likely a general feature of the perovskite NCs and can be tuned via NC size distribution to influence their performance within NC-based nonlinear optical materials and devices.

AB - Cesium lead bromide (CsPbBr3) perovskite nanocrystals (NCs), with large two-photon absorption (TPA) cross-section and bright photoluminescence (PL), have been demonstrated as stable two-photon-pumped lasing medium. With two-photon excitation, red-shifted PL spectrum and increased PL lifetime is observed compared with one-photon excitation. We have investigated the origin of such difference using time-resolved laser spectroscopies. We ascribe the difference to the enhanced size selection of NCs by two-photon excitation. Because of inherent nonlinearity, the size dependence of absorption cross-section under TPA is stronger. Consequently, larger size NCs are preferably excited, leading to longer excited-state lifetime and red-shifted PL emission. In a broad view, the enhanced size selection in two-photon excitation of CsPbBr3 NCs is likely a general feature of the perovskite NCs and can be tuned via NC size distribution to influence their performance within NC-based nonlinear optical materials and devices.

U2 - 10.1021/acs.jpclett.7b02178

DO - 10.1021/acs.jpclett.7b02178

M3 - Article

C2 - 28975796

AN - SCOPUS:85031791367

SN - 1948-7185

VL - 8

SP - 5119

EP - 5124

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 20

ER -

Enhanced Size Selection in Two-Photon Excitation for CsPbBr3 Perovskite Nanocrystals

Abstract

Subject classification (UKÄ)

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Research output

Photophysics of Perovskite Nano- and Microcrystals

Equipment

National Center for High Resolution Electron Microscopy - ARTEMI Atomic Resolution TEM infrastructure of Sweden

Cite this

Enhanced Size Selection in Two-Photon Excitation for CsPbBr₃ Perovskite Nanocrystals