Multiexcitonic Triplet Pair Generation in Oligoacene Dendrimers as Amorphous Solid-State Miniatures

Juno Kim; Hao Ting Teo; Yongseok Hong; Juwon Oh; Hyungjun Kim; Chunyan Chi; Dongho Kim

doi:10.1002/anie.202008533

Multiexcitonic Triplet Pair Generation in Oligoacene Dendrimers as Amorphous Solid-State Miniatures

Juno Kim, Hao Ting Teo, Yongseok Hong, Juwon Oh, Hyungjun Kim, Chunyan Chi, Dongho Kim

Department of Chemistry

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

3 Citations (Scopus)

Abstract

Singlet fission in organic semiconducting materials has attracted great attention for the potential application in photovoltaic devices. Research interests have been concentrated on identifying working mechanisms of coherent SF processes in crystalline solids as ultrafast SF is hailed for efficient multiexciton generation. However, as long lifetime of multiexcitonic triplet pair in amorphous solids facilitates the decorrelation process for triplet exciton extractions, a precise examination of incoherent SF processes is demanded in delicate model systems to represent heterogeneous structures. Heterogeneous coupling and energetics for SF were developed in our oligoacene dendrimers, which mimic complicated SF dynamics in amorphous solids. SF dynamics in dendritic structures was thoroughly investigated by time-resolved spectroscopic techniques and quantum chemical calculations in respect of the relative orientation/distance between chromophores and though-bond/-space interactions.

Original language	English
Pages (from-to)	20956-20964
Number of pages	9
Journal	Angewandte Chemie - International Edition
Volume	59
Issue number	47
DOIs	https://doi.org/10.1002/anie.202008533
Publication status	Published - 2020 Nov 16

Bibliographical note

Funding Information:
The research at Yonsei University was supported by the NRF (National Research Foundation of Korea) grant funded by Korea government (NRF‐2016R1E1A1A01943379). This work was also supported by AFOSR/AOARD grant (FA2386‐17‐1‐4086). The research at National University of Singapore was supported by MOE Tier 2 grant (MOE2018‐T2‐1‐152) and Tier 3 programme (MOE2014‐T3‐1‐004). The research at Incheon National University was supported by the NRF grant (NRF‐2019R1G1A1099961). Basic Science Research Program through the NRF (NRF2017R1A6A1A06015181) grant funded by the Ministry of Education also supported this work.

Funding Information:
The research at Yonsei University was supported by the NRF (National Research Foundation of Korea) grant funded by Korea government (NRF-2016R1E1A1A01943379). This work was also supported by AFOSR/AOARD grant (FA2386-17-1-4086). The research at National University of Singapore was supported by MOE Tier 2 grant (MOE2018-T2-1-152) and Tier 3 programme (MOE2014-T3-1-004). The research at Incheon National University was supported by the NRF grant (NRF-2019R1G1A1099961). Basic Science Research Program through the NRF (NRF2017R1A6A1A06015181) grant funded by the Ministry of Education also supported this work.

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)

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@article{585c60af600643ab85d887e5163ae67c,

title = "Multiexcitonic Triplet Pair Generation in Oligoacene Dendrimers as Amorphous Solid-State Miniatures",

abstract = "Singlet fission in organic semiconducting materials has attracted great attention for the potential application in photovoltaic devices. Research interests have been concentrated on identifying working mechanisms of coherent SF processes in crystalline solids as ultrafast SF is hailed for efficient multiexciton generation. However, as long lifetime of multiexcitonic triplet pair in amorphous solids facilitates the decorrelation process for triplet exciton extractions, a precise examination of incoherent SF processes is demanded in delicate model systems to represent heterogeneous structures. Heterogeneous coupling and energetics for SF were developed in our oligoacene dendrimers, which mimic complicated SF dynamics in amorphous solids. SF dynamics in dendritic structures was thoroughly investigated by time-resolved spectroscopic techniques and quantum chemical calculations in respect of the relative orientation/distance between chromophores and though-bond/-space interactions.",

author = "Juno Kim and Teo, {Hao Ting} and Yongseok Hong and Juwon Oh and Hyungjun Kim and Chunyan Chi and Dongho Kim",

note = "Funding Information: The research at Yonsei University was supported by the NRF (National Research Foundation of Korea) grant funded by Korea government (NRF‐2016R1E1A1A01943379). This work was also supported by AFOSR/AOARD grant (FA2386‐17‐1‐4086). The research at National University of Singapore was supported by MOE Tier 2 grant (MOE2018‐T2‐1‐152) and Tier 3 programme (MOE2014‐T3‐1‐004). The research at Incheon National University was supported by the NRF grant (NRF‐2019R1G1A1099961). Basic Science Research Program through the NRF (NRF2017R1A6A1A06015181) grant funded by the Ministry of Education also supported this work. Funding Information: The research at Yonsei University was supported by the NRF (National Research Foundation of Korea) grant funded by Korea government (NRF-2016R1E1A1A01943379). This work was also supported by AFOSR/AOARD grant (FA2386-17-1-4086). The research at National University of Singapore was supported by MOE Tier 2 grant (MOE2018-T2-1-152) and Tier 3 programme (MOE2014-T3-1-004). The research at Incheon National University was supported by the NRF grant (NRF-2019R1G1A1099961). Basic Science Research Program through the NRF (NRF2017R1A6A1A06015181) grant funded by the Ministry of Education also supported this work.",

year = "2020",

month = nov,

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doi = "10.1002/anie.202008533",

language = "English",

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AU - Kim, Juno

AU - Teo, Hao Ting

AU - Hong, Yongseok

AU - Oh, Juwon

AU - Kim, Hyungjun

AU - Chi, Chunyan

AU - Kim, Dongho

N1 - Funding Information: The research at Yonsei University was supported by the NRF (National Research Foundation of Korea) grant funded by Korea government (NRF‐2016R1E1A1A01943379). This work was also supported by AFOSR/AOARD grant (FA2386‐17‐1‐4086). The research at National University of Singapore was supported by MOE Tier 2 grant (MOE2018‐T2‐1‐152) and Tier 3 programme (MOE2014‐T3‐1‐004). The research at Incheon National University was supported by the NRF grant (NRF‐2019R1G1A1099961). Basic Science Research Program through the NRF (NRF2017R1A6A1A06015181) grant funded by the Ministry of Education also supported this work. Funding Information: The research at Yonsei University was supported by the NRF (National Research Foundation of Korea) grant funded by Korea government (NRF-2016R1E1A1A01943379). This work was also supported by AFOSR/AOARD grant (FA2386-17-1-4086). The research at National University of Singapore was supported by MOE Tier 2 grant (MOE2018-T2-1-152) and Tier 3 programme (MOE2014-T3-1-004). The research at Incheon National University was supported by the NRF grant (NRF-2019R1G1A1099961). Basic Science Research Program through the NRF (NRF2017R1A6A1A06015181) grant funded by the Ministry of Education also supported this work.

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