Diffusion-Dominated Luminescence Dynamics of CsPbBr3 Studied Using Cathodoluminescence and Microphotoluminescence Spectroscopy

Sho Nekita; Sotatsu Yanagimoto; Takumi Sannomiya; Keiichirou Akiba; Masato Takiguchi; Hisashi Sumikura; Itsuki Takagi; Kazutaka G. Nakamura; SenPo Yip; You Meng; Johnny C. Ho; Tetsuya Okuyama; Mitsuhiro Murayama; Hikaru Saito

doi:10.1021/acs.nanolett.4c00483

Diffusion-Dominated Luminescence Dynamics of CsPbBr₃ Studied Using Cathodoluminescence and Microphotoluminescence Spectroscopy

Sho Nekita, Sotatsu Yanagimoto, Takumi Sannomiya, Keiichirou Akiba, Masato Takiguchi, Hisashi Sumikura, Itsuki Takagi, Kazutaka G. Nakamura, SenPo Yip, You Meng, Johnny C. Ho, Tetsuya Okuyama, Mitsuhiro Murayama, Hikaru Saito^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

2 Citations (Scopus)

Abstract

Time-resolved or time-correlation measurements using cathodoluminescence (CL) reveal the electronic and optical properties of semiconductors, such as their carrier lifetimes, at the nanoscale. However, halide perovskites, which are promising optoelectronic materials, exhibit significantly different decay dynamics in their CL and photoluminescence (PL). We conducted time-correlation CL measurements of CsPbBr₃ using Hanbury Brown-Twiss interferometry and compared them with time-resolved PL. The measured CL decay time was on the order of subnanoseconds and was faster than PL decay at an excited carrier density of 2.1 × 10¹⁸ cm^-3. Our experiment and analytical model revealed the CL dynamics induced by individual electron incidences, which are characterized by highly localized carrier generation followed by a rapid decrease in carrier density due to diffusion. This carrier diffusion can play a dominant role in the CL decay time for undoped semiconductors, in general, when the diffusion dynamics are faster than the carrier recombination. © 2024 American Chemical Society.

Original language	English
Pages (from-to)	3971-3977
Journal	Nano Letters
Volume	24
Issue number	13
Online published	19 Mar 2024
DOIs	https://doi.org/10.1021/acs.nanolett.4c00483
Publication status	Published - 3 Apr 2024

Research Keywords

carrier diffusion
carrier dynamics
cathodoluminescence
halide perovskite
lifetime measurement
photoluminescence

Access Output

10.1021/acs.nanolett.4c00483

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

Nekita, S., Yanagimoto, S., Sannomiya, T., Akiba, K., Takiguchi, M., Sumikura, H., Takagi, I., Nakamura, K. G., Yip, S., Meng, Y., Ho, J. C., Okuyama, T., Murayama, M., & Saito, H. (2024). Diffusion-Dominated Luminescence Dynamics of CsPbBr₃ Studied Using Cathodoluminescence and Microphotoluminescence Spectroscopy. Nano Letters, 24(13), 3971-3977. https://doi.org/10.1021/acs.nanolett.4c00483

@article{ecf174d5e6d74323802cc1671a5b61fb,

title = "Diffusion-Dominated Luminescence Dynamics of CsPbBr3 Studied Using Cathodoluminescence and Microphotoluminescence Spectroscopy",

abstract = "Time-resolved or time-correlation measurements using cathodoluminescence (CL) reveal the electronic and optical properties of semiconductors, such as their carrier lifetimes, at the nanoscale. However, halide perovskites, which are promising optoelectronic materials, exhibit significantly different decay dynamics in their CL and photoluminescence (PL). We conducted time-correlation CL measurements of CsPbBr3 using Hanbury Brown-Twiss interferometry and compared them with time-resolved PL. The measured CL decay time was on the order of subnanoseconds and was faster than PL decay at an excited carrier density of 2.1 × 1018 cm-3. Our experiment and analytical model revealed the CL dynamics induced by individual electron incidences, which are characterized by highly localized carrier generation followed by a rapid decrease in carrier density due to diffusion. This carrier diffusion can play a dominant role in the CL decay time for undoped semiconductors, in general, when the diffusion dynamics are faster than the carrier recombination. {\textcopyright} 2024 American Chemical Society.",

keywords = "carrier diffusion, carrier dynamics, cathodoluminescence, halide perovskite, lifetime measurement, photoluminescence",

author = "Sho Nekita and Sotatsu Yanagimoto and Takumi Sannomiya and Keiichirou Akiba and Masato Takiguchi and Hisashi Sumikura and Itsuki Takagi and Nakamura, {Kazutaka G.} and SenPo Yip and You Meng and Ho, {Johnny C.} and Tetsuya Okuyama and Mitsuhiro Murayama and Hikaru Saito",

year = "2024",

month = apr,

day = "3",

doi = "10.1021/acs.nanolett.4c00483",

language = "English",

volume = "24",

pages = "3971--3977",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "13",

}

Nekita, S, Yanagimoto, S, Sannomiya, T, Akiba, K, Takiguchi, M, Sumikura, H, Takagi, I, Nakamura, KG, Yip, S, Meng, Y , Ho, JC, Okuyama, T, Murayama, M & Saito, H 2024, 'Diffusion-Dominated Luminescence Dynamics of CsPbBr₃ Studied Using Cathodoluminescence and Microphotoluminescence Spectroscopy', Nano Letters, vol. 24, no. 13, pp. 3971-3977. https://doi.org/10.1021/acs.nanolett.4c00483

TY - JOUR

T1 - Diffusion-Dominated Luminescence Dynamics of CsPbBr3 Studied Using Cathodoluminescence and Microphotoluminescence Spectroscopy

AU - Nekita, Sho

AU - Yanagimoto, Sotatsu

AU - Sannomiya, Takumi

AU - Akiba, Keiichirou

AU - Takiguchi, Masato

AU - Sumikura, Hisashi

AU - Takagi, Itsuki

AU - Nakamura, Kazutaka G.

AU - Yip, SenPo

AU - Meng, You

AU - Ho, Johnny C.

AU - Okuyama, Tetsuya

AU - Murayama, Mitsuhiro

AU - Saito, Hikaru

PY - 2024/4/3

Y1 - 2024/4/3

N2 - Time-resolved or time-correlation measurements using cathodoluminescence (CL) reveal the electronic and optical properties of semiconductors, such as their carrier lifetimes, at the nanoscale. However, halide perovskites, which are promising optoelectronic materials, exhibit significantly different decay dynamics in their CL and photoluminescence (PL). We conducted time-correlation CL measurements of CsPbBr3 using Hanbury Brown-Twiss interferometry and compared them with time-resolved PL. The measured CL decay time was on the order of subnanoseconds and was faster than PL decay at an excited carrier density of 2.1 × 1018 cm-3. Our experiment and analytical model revealed the CL dynamics induced by individual electron incidences, which are characterized by highly localized carrier generation followed by a rapid decrease in carrier density due to diffusion. This carrier diffusion can play a dominant role in the CL decay time for undoped semiconductors, in general, when the diffusion dynamics are faster than the carrier recombination. © 2024 American Chemical Society.

AB - Time-resolved or time-correlation measurements using cathodoluminescence (CL) reveal the electronic and optical properties of semiconductors, such as their carrier lifetimes, at the nanoscale. However, halide perovskites, which are promising optoelectronic materials, exhibit significantly different decay dynamics in their CL and photoluminescence (PL). We conducted time-correlation CL measurements of CsPbBr3 using Hanbury Brown-Twiss interferometry and compared them with time-resolved PL. The measured CL decay time was on the order of subnanoseconds and was faster than PL decay at an excited carrier density of 2.1 × 1018 cm-3. Our experiment and analytical model revealed the CL dynamics induced by individual electron incidences, which are characterized by highly localized carrier generation followed by a rapid decrease in carrier density due to diffusion. This carrier diffusion can play a dominant role in the CL decay time for undoped semiconductors, in general, when the diffusion dynamics are faster than the carrier recombination. © 2024 American Chemical Society.

KW - carrier diffusion

KW - carrier dynamics

KW - cathodoluminescence

KW - halide perovskite

KW - lifetime measurement

KW - photoluminescence

UR - http://www.scopus.com/inward/record.url?scp=85188254230&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85188254230&origin=recordpage

U2 - 10.1021/acs.nanolett.4c00483

DO - 10.1021/acs.nanolett.4c00483

M3 - RGC 21 - Publication in refereed journal

C2 - 38501652

SN - 1530-6984

VL - 24

SP - 3971

EP - 3977

JO - Nano Letters

JF - Nano Letters

IS - 13

ER -