Modulation of Intersystem Crossing Rate Induced by Singlet-triplet Energy Level Alignment in 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene Single Crystals

Shintaro Kohata; Hajime Nakanotani; Chihaya Adachi

doi:10.1246/cl.220304

Modulation of Intersystem Crossing Rate Induced by Singlet-triplet Energy Level Alignment in 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene Single Crystals

Shintaro Kohata, Hajime Nakanotani, Chihaya Adachi

Functional Materials Chemistry

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

Abstract

In this study, we investigated the photophysical properties of 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) in a single crystal (SC) state. We found that the forward intersystem crossing (ISC) and reverse ISC rate constants (kISC and kRISC) of a 4CzIPN-SC are one order magnitude higher than that of the amorphous film. Further, an unusual long-lived emission component was observed in 4CzIPN-SC, indicating that the excitons generated by optical excitation spontaneously dissociate into free carriers in 4CzIPN-SC.

Original language	English
Pages (from-to)	989-992
Number of pages	4
Journal	Chemistry Letters
Volume	51
Issue number	10
DOIs	https://doi.org/10.1246/cl.220304
Publication status	Published - Oct 2022

All Science Journal Classification (ASJC) codes

Chemistry(all)

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10.1246/cl.220304

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@article{68d4fdd4341449ea9163a318fef913e0,

title = "Modulation of Intersystem Crossing Rate Induced by Singlet-triplet Energy Level Alignment in 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene Single Crystals",

abstract = "In this study, we investigated the photophysical properties of 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) in a single crystal (SC) state. We found that the forward intersystem crossing (ISC) and reverse ISC rate constants (kISC and kRISC) of a 4CzIPN-SC are one order magnitude higher than that of the amorphous film. Further, an unusual long-lived emission component was observed in 4CzIPN-SC, indicating that the excitons generated by optical excitation spontaneously dissociate into free carriers in 4CzIPN-SC.",

author = "Shintaro Kohata and Hajime Nakanotani and Chihaya Adachi",

note = "Funding Information: This work was supported in part by the Japan Society for the Promotion of Science (JSPS) KAKENHI, Grant Numbers JP21H02015. The authors acknowledge Takahiko Yamanaka for his assistance with the measurement of the long-timescale transient photoluminescence decay profile. Publisher Copyright: {\textcopyright} 2022 The Chemical Society of Japan.",

year = "2022",

month = oct,

doi = "10.1246/cl.220304",

language = "English",

volume = "51",

pages = "989--992",

journal = "Chemistry Letters",

issn = "0366-7022",

publisher = "The Chemical Society of Japan",

number = "10",

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TY - JOUR

T1 - Modulation of Intersystem Crossing Rate Induced by Singlet-triplet Energy Level Alignment in 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene Single Crystals

AU - Kohata, Shintaro

AU - Nakanotani, Hajime

AU - Adachi, Chihaya

N1 - Funding Information: This work was supported in part by the Japan Society for the Promotion of Science (JSPS) KAKENHI, Grant Numbers JP21H02015. The authors acknowledge Takahiko Yamanaka for his assistance with the measurement of the long-timescale transient photoluminescence decay profile. Publisher Copyright: © 2022 The Chemical Society of Japan.

PY - 2022/10

Y1 - 2022/10

N2 - In this study, we investigated the photophysical properties of 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) in a single crystal (SC) state. We found that the forward intersystem crossing (ISC) and reverse ISC rate constants (kISC and kRISC) of a 4CzIPN-SC are one order magnitude higher than that of the amorphous film. Further, an unusual long-lived emission component was observed in 4CzIPN-SC, indicating that the excitons generated by optical excitation spontaneously dissociate into free carriers in 4CzIPN-SC.

AB - In this study, we investigated the photophysical properties of 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) in a single crystal (SC) state. We found that the forward intersystem crossing (ISC) and reverse ISC rate constants (kISC and kRISC) of a 4CzIPN-SC are one order magnitude higher than that of the amorphous film. Further, an unusual long-lived emission component was observed in 4CzIPN-SC, indicating that the excitons generated by optical excitation spontaneously dissociate into free carriers in 4CzIPN-SC.

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U2 - 10.1246/cl.220304

DO - 10.1246/cl.220304

M3 - Article

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SN - 0366-7022

VL - 51

SP - 989

EP - 992

JO - Chemistry Letters

JF - Chemistry Letters

IS - 10

ER -

Modulation of Intersystem Crossing Rate Induced by Singlet-triplet Energy Level Alignment in 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene Single Crystals

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