Unveiling Charge-Transfer Dynamics at Singlet Fission Layer/Hybrid Perovskite Interface

Xingchi Xiao; Liang Cheng; Di Bao; Qi Ying Tan; Teddy Salim; Cesare Soci; Elbert E.M. Chia; Yeng Ming Lam

doi:10.1021/acsami.3c06933

Unveiling Charge-Transfer Dynamics at Singlet Fission Layer/Hybrid Perovskite Interface

Xingchi Xiao, Liang Cheng, Di Bao, Qi Ying Tan, Teddy Salim, Cesare Soci, Elbert E.M. Chia^*, Yeng Ming Lam^*

^*Corresponding author for this work

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

3 Citations (Scopus)

Abstract

Singlet fission (SF) materials have been applied in various types of solar cells to pursue higher power conversion efficiency (PCE) beyond the Shockley-Queisser (SQ) limit. SF implementation in perovskite solar cells has not been successfully realized yet due to the insufficient understanding of the SF/perovskite heterojunctions. In this work, we attempt to elucidate the charge dynamics of an SF/perovskite system by incorporating a well-known SF molecule, TIPS-pentacene, and a triple-cation perovskite Cs_0.05(FA_0.85MA_0.15)_0.95PbI_2.55Br_0.45, owing to their well-matched energy structures. The transient absorption spectra and kinetic fitting plots suggest an electron-transfer process from the triplet state of TIPS-pentacene to perovskite in the picosecond regime, which increases the carrier density by 20% in the perovskite layer. This work confirms the existence of an electron-transfer process between the SF material and perovskite, providing a pathway to SF-enhanced perovskite solar cells.

Original language	English
Pages (from-to)	38049-38055
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	15
Issue number	31
DOIs	https://doi.org/10.1021/acsami.3c06933
Publication status	Published - Aug 9 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society.

ASJC Scopus Subject Areas

General Materials Science

Keywords

charge transfer
heterojunction
perovskite
singlet fission
TIPS-pentacene
transient absorption

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10.1021/acsami.3c06933

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title = "Unveiling Charge-Transfer Dynamics at Singlet Fission Layer/Hybrid Perovskite Interface",

abstract = "Singlet fission (SF) materials have been applied in various types of solar cells to pursue higher power conversion efficiency (PCE) beyond the Shockley-Queisser (SQ) limit. SF implementation in perovskite solar cells has not been successfully realized yet due to the insufficient understanding of the SF/perovskite heterojunctions. In this work, we attempt to elucidate the charge dynamics of an SF/perovskite system by incorporating a well-known SF molecule, TIPS-pentacene, and a triple-cation perovskite Cs0.05(FA0.85MA0.15)0.95PbI2.55Br0.45, owing to their well-matched energy structures. The transient absorption spectra and kinetic fitting plots suggest an electron-transfer process from the triplet state of TIPS-pentacene to perovskite in the picosecond regime, which increases the carrier density by 20\% in the perovskite layer. This work confirms the existence of an electron-transfer process between the SF material and perovskite, providing a pathway to SF-enhanced perovskite solar cells.",

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year = "2023",

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AU - Xiao, Xingchi

AU - Cheng, Liang

AU - Bao, Di

AU - Tan, Qi Ying

AU - Salim, Teddy

AU - Soci, Cesare

AU - Chia, Elbert E.M.

AU - Lam, Yeng Ming

PY - 2023/8/9

Y1 - 2023/8/9

N2 - Singlet fission (SF) materials have been applied in various types of solar cells to pursue higher power conversion efficiency (PCE) beyond the Shockley-Queisser (SQ) limit. SF implementation in perovskite solar cells has not been successfully realized yet due to the insufficient understanding of the SF/perovskite heterojunctions. In this work, we attempt to elucidate the charge dynamics of an SF/perovskite system by incorporating a well-known SF molecule, TIPS-pentacene, and a triple-cation perovskite Cs0.05(FA0.85MA0.15)0.95PbI2.55Br0.45, owing to their well-matched energy structures. The transient absorption spectra and kinetic fitting plots suggest an electron-transfer process from the triplet state of TIPS-pentacene to perovskite in the picosecond regime, which increases the carrier density by 20% in the perovskite layer. This work confirms the existence of an electron-transfer process between the SF material and perovskite, providing a pathway to SF-enhanced perovskite solar cells.

AB - Singlet fission (SF) materials have been applied in various types of solar cells to pursue higher power conversion efficiency (PCE) beyond the Shockley-Queisser (SQ) limit. SF implementation in perovskite solar cells has not been successfully realized yet due to the insufficient understanding of the SF/perovskite heterojunctions. In this work, we attempt to elucidate the charge dynamics of an SF/perovskite system by incorporating a well-known SF molecule, TIPS-pentacene, and a triple-cation perovskite Cs0.05(FA0.85MA0.15)0.95PbI2.55Br0.45, owing to their well-matched energy structures. The transient absorption spectra and kinetic fitting plots suggest an electron-transfer process from the triplet state of TIPS-pentacene to perovskite in the picosecond regime, which increases the carrier density by 20% in the perovskite layer. This work confirms the existence of an electron-transfer process between the SF material and perovskite, providing a pathway to SF-enhanced perovskite solar cells.

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KW - perovskite

KW - singlet fission

KW - TIPS-pentacene

KW - transient absorption

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Unveiling Charge-Transfer Dynamics at Singlet Fission Layer/Hybrid Perovskite Interface

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

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