Ultrafast Carrier Drift Transport Dynamics in CsPbI3 Perovskite Nanocrystalline Thin Films

Kanishka Kobbekaduwa; Exian Liu; Qian Zhao; Jasjit Singh Bains; Jianbing Zhang; Ying Shi; Haimei Zheng; Dawen Li; Tong Cai; Ou Chen; Apparao Rao; Matthew Beard; Joseph Luther; Jianbo Gao

doi:10.1021/acsnano.3c03989

Ultrafast Carrier Drift Transport Dynamics in CsPbI3 Perovskite Nanocrystalline Thin Films

Kanishka Kobbekaduwa, Exian Liu, Qian Zhao, Jasjit Singh Bains, Jianbing Zhang, Ying Shi, Haimei Zheng, Dawen Li, Tong Cai, Ou Chen, Apparao Rao, Matthew Beard, Joseph Luther, Jianbo Gao

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

2 Scopus Citations

Abstract

We study the early time carrier drift dynamics in CsPbI3 nanocrystal thin films with a sub 25 ps time resolution. Prior to trapping, carriers exhibit band-like transport characteristics, which is similar to those of traditional semiconductor solar absorbers including Si and GaAs due to optical phonon and carrier scattering at high temperatures. In contrast to the popular polaron scattering mechanism, the CsPbI3 nanocrystal thin film demonstrates the strongest optical phonon scattering mechanism among other inorganic-organic hybrid perovskites, Si, and GaAs. This ultrafast dynamics study establishes a foundation for understanding the fundamental carrier drift properties that drive perovskite nanocrystal optoelectronics.

Original language	American English
Pages (from-to)	13997-14004
Number of pages	8
Journal	ACS Nano
Volume	17
Issue number	14
DOIs	https://doi.org/10.1021/acsnano.3c03989
State	Published - 2023

NREL Publication Number

NREL/JA-5900-87066

Keywords

mobility
phonons
photocurrent
polarons
scattering

Access to Document

10.1021/acsnano.3c03989

Cite this

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title = "Ultrafast Carrier Drift Transport Dynamics in CsPbI3 Perovskite Nanocrystalline Thin Films",

abstract = "We study the early time carrier drift dynamics in CsPbI3 nanocrystal thin films with a sub 25 ps time resolution. Prior to trapping, carriers exhibit band-like transport characteristics, which is similar to those of traditional semiconductor solar absorbers including Si and GaAs due to optical phonon and carrier scattering at high temperatures. In contrast to the popular polaron scattering mechanism, the CsPbI3 nanocrystal thin film demonstrates the strongest optical phonon scattering mechanism among other inorganic-organic hybrid perovskites, Si, and GaAs. This ultrafast dynamics study establishes a foundation for understanding the fundamental carrier drift properties that drive perovskite nanocrystal optoelectronics.",

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author = "Kanishka Kobbekaduwa and Exian Liu and Qian Zhao and {Singh Bains}, Jasjit and Jianbing Zhang and Ying Shi and Haimei Zheng and Dawen Li and Tong Cai and Ou Chen and Apparao Rao and Matthew Beard and Joseph Luther and Jianbo Gao",

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T1 - Ultrafast Carrier Drift Transport Dynamics in CsPbI3 Perovskite Nanocrystalline Thin Films

AU - Kobbekaduwa, Kanishka

AU - Liu, Exian

AU - Zhao, Qian

AU - Singh Bains, Jasjit

AU - Zhang, Jianbing

AU - Shi, Ying

AU - Zheng, Haimei

AU - Li, Dawen

AU - Cai, Tong

AU - Chen, Ou

AU - Rao, Apparao

AU - Beard, Matthew

AU - Luther, Joseph

AU - Gao, Jianbo

PY - 2023

Y1 - 2023

N2 - We study the early time carrier drift dynamics in CsPbI3 nanocrystal thin films with a sub 25 ps time resolution. Prior to trapping, carriers exhibit band-like transport characteristics, which is similar to those of traditional semiconductor solar absorbers including Si and GaAs due to optical phonon and carrier scattering at high temperatures. In contrast to the popular polaron scattering mechanism, the CsPbI3 nanocrystal thin film demonstrates the strongest optical phonon scattering mechanism among other inorganic-organic hybrid perovskites, Si, and GaAs. This ultrafast dynamics study establishes a foundation for understanding the fundamental carrier drift properties that drive perovskite nanocrystal optoelectronics.

AB - We study the early time carrier drift dynamics in CsPbI3 nanocrystal thin films with a sub 25 ps time resolution. Prior to trapping, carriers exhibit band-like transport characteristics, which is similar to those of traditional semiconductor solar absorbers including Si and GaAs due to optical phonon and carrier scattering at high temperatures. In contrast to the popular polaron scattering mechanism, the CsPbI3 nanocrystal thin film demonstrates the strongest optical phonon scattering mechanism among other inorganic-organic hybrid perovskites, Si, and GaAs. This ultrafast dynamics study establishes a foundation for understanding the fundamental carrier drift properties that drive perovskite nanocrystal optoelectronics.

KW - mobility

KW - phonons

KW - photocurrent

KW - polarons

KW - scattering

UR - http://www.scopus.com/inward/record.url?scp=85166763289&partnerID=8YFLogxK

U2 - 10.1021/acsnano.3c03989

DO - 10.1021/acsnano.3c03989

M3 - Article

SN - 1936-0851

VL - 17

SP - 13997

EP - 14004

JO - ACS Nano

JF - ACS Nano

IS - 14

ER -

Ultrafast Carrier Drift Transport Dynamics in CsPbI3 Perovskite Nanocrystalline Thin Films

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Keywords

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