2D-σ-2A type cruciform host material with silane core for highly efficient solution-processable green thermally activated delayed fluorescence organic light emitting diodes

Suna Choi; Ji Won Yoon; Mallesham Godumala; Hyung Jong Kim; Su Hong Park; Seong Keun Kim; Hyuna Lee; Jang Hyuk Kwon; Min Ju Cho; Dong Hoon Choi

doi:10.1016/j.dyepig.2019.04.014

2D-σ-2A type cruciform host material with silane core for highly efficient solution-processable green thermally activated delayed fluorescence organic light emitting diodes

Suna Choi, Ji Won Yoon, Mallesham Godumala, Hyung Jong Kim, Su Hong Park, Seong Keun Kim, Hyuna Lee, Jang Hyuk Kwon, Min Ju Cho, Dong Hoon Choi

Department of Chemistry

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

6 Citations (Scopus)

Abstract

A new solution processable cruciform tetraphenylsilane-based bipolar host material, bis(4-(9H-carbazol-9-yl)phenyl)bis(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)silane (SiCT), was designed and synthesized. Two carbazoles as donors and two diphenyl triazine moieties as acceptors were tethered to the tetraphenylsilane. SiCT showed great solubility in common organic solvents, high thermal stability, high triplet energy (T ₁ ∼3.0 eV), and a superior bipolar electronic nature, which are sufficient for it to function as a host material in thermally activated delayed fluorescence organic light emitting diodes (TADF-OLEDs). Consequently, the solution-processed green TADF-OLEDs employed SiCT as a bipolar host exhibited a low turn-on voltage and high external quantum efficiency (EQE) of 19.17% with a high power efficiency (PE) of 41.13 lm W ⁻¹ , while control device based-on SiC as unipolar host showed a low EQE of 12.74% with a low PE of 16.13 lm W ⁻¹ . This work highlights the potential of a bipolar tetraphenylsilane derivative as a host material in solution-processable green TADF-OLEDs.

Original language	English
Pages (from-to)	120-126
Number of pages	7
Journal	Dyes and Pigments
Volume	167
DOIs	https://doi.org/10.1016/j.dyepig.2019.04.014
Publication status	Published - 2019 Aug 1

Keywords

Carbazole
Organic light emitting diode
Solution process
Tetraphenylsilane
Thermally activated delayed fluorescence
Triphenyltriazine

ASJC Scopus subject areas

Chemical Engineering(all)
Process Chemistry and Technology

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Choi, S., Yoon, J. W., Godumala, M., Kim, H. J., Park, S. H., Kim, S. K., Lee, H., Kwon, J. H., Cho, M. J., & Choi, D. H. (2019). 2D-σ-2A type cruciform host material with silane core for highly efficient solution-processable green thermally activated delayed fluorescence organic light emitting diodes. Dyes and Pigments, 167, 120-126. https://doi.org/10.1016/j.dyepig.2019.04.014

2D-σ-2A type cruciform host material with silane core for highly efficient solution-processable green thermally activated delayed fluorescence organic light emitting diodes. / Choi, Suna; Yoon, Ji Won; Godumala, Mallesham; Kim, Hyung Jong; Park, Su Hong; Kim, Seong Keun; Lee, Hyuna; Kwon, Jang Hyuk; Cho, Min Ju; Choi, Dong Hoon.

In: Dyes and Pigments, Vol. 167, 01.08.2019, p. 120-126.

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

Choi, Suna ; Yoon, Ji Won ; Godumala, Mallesham ; Kim, Hyung Jong ; Park, Su Hong ; Kim, Seong Keun ; Lee, Hyuna ; Kwon, Jang Hyuk ; Cho, Min Ju ; Choi, Dong Hoon. / 2D-σ-2A type cruciform host material with silane core for highly efficient solution-processable green thermally activated delayed fluorescence organic light emitting diodes. In: Dyes and Pigments. 2019 ; Vol. 167. pp. 120-126.

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title = "2D-σ-2A type cruciform host material with silane core for highly efficient solution-processable green thermally activated delayed fluorescence organic light emitting diodes",

abstract = " A new solution processable cruciform tetraphenylsilane-based bipolar host material, bis(4-(9H-carbazol-9-yl)phenyl)bis(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)silane (SiCT), was designed and synthesized. Two carbazoles as donors and two diphenyl triazine moieties as acceptors were tethered to the tetraphenylsilane. SiCT showed great solubility in common organic solvents, high thermal stability, high triplet energy (T 1 ∼3.0 eV), and a superior bipolar electronic nature, which are sufficient for it to function as a host material in thermally activated delayed fluorescence organic light emitting diodes (TADF-OLEDs). Consequently, the solution-processed green TADF-OLEDs employed SiCT as a bipolar host exhibited a low turn-on voltage and high external quantum efficiency (EQE) of 19.17% with a high power efficiency (PE) of 41.13 lm W −1 , while control device based-on SiC as unipolar host showed a low EQE of 12.74% with a low PE of 16.13 lm W −1 . This work highlights the potential of a bipolar tetraphenylsilane derivative as a host material in solution-processable green TADF-OLEDs. ",

keywords = "Carbazole, Organic light emitting diode, Solution process, Tetraphenylsilane, Thermally activated delayed fluorescence, Triphenyltriazine",

author = "Suna Choi and Yoon, {Ji Won} and Mallesham Godumala and Kim, {Hyung Jong} and Park, {Su Hong} and Kim, {Seong Keun} and Hyuna Lee and Kwon, {Jang Hyuk} and Cho, {Min Ju} and Choi, {Dong Hoon}",

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AU - Choi, Suna

AU - Yoon, Ji Won

AU - Godumala, Mallesham

AU - Kim, Hyung Jong

AU - Park, Su Hong

AU - Kim, Seong Keun

AU - Lee, Hyuna

AU - Kwon, Jang Hyuk

AU - Cho, Min Ju

AU - Choi, Dong Hoon

PY - 2019/8/1

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N2 - A new solution processable cruciform tetraphenylsilane-based bipolar host material, bis(4-(9H-carbazol-9-yl)phenyl)bis(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)silane (SiCT), was designed and synthesized. Two carbazoles as donors and two diphenyl triazine moieties as acceptors were tethered to the tetraphenylsilane. SiCT showed great solubility in common organic solvents, high thermal stability, high triplet energy (T 1 ∼3.0 eV), and a superior bipolar electronic nature, which are sufficient for it to function as a host material in thermally activated delayed fluorescence organic light emitting diodes (TADF-OLEDs). Consequently, the solution-processed green TADF-OLEDs employed SiCT as a bipolar host exhibited a low turn-on voltage and high external quantum efficiency (EQE) of 19.17% with a high power efficiency (PE) of 41.13 lm W −1 , while control device based-on SiC as unipolar host showed a low EQE of 12.74% with a low PE of 16.13 lm W −1 . This work highlights the potential of a bipolar tetraphenylsilane derivative as a host material in solution-processable green TADF-OLEDs.

AB - A new solution processable cruciform tetraphenylsilane-based bipolar host material, bis(4-(9H-carbazol-9-yl)phenyl)bis(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)silane (SiCT), was designed and synthesized. Two carbazoles as donors and two diphenyl triazine moieties as acceptors were tethered to the tetraphenylsilane. SiCT showed great solubility in common organic solvents, high thermal stability, high triplet energy (T 1 ∼3.0 eV), and a superior bipolar electronic nature, which are sufficient for it to function as a host material in thermally activated delayed fluorescence organic light emitting diodes (TADF-OLEDs). Consequently, the solution-processed green TADF-OLEDs employed SiCT as a bipolar host exhibited a low turn-on voltage and high external quantum efficiency (EQE) of 19.17% with a high power efficiency (PE) of 41.13 lm W −1 , while control device based-on SiC as unipolar host showed a low EQE of 12.74% with a low PE of 16.13 lm W −1 . This work highlights the potential of a bipolar tetraphenylsilane derivative as a host material in solution-processable green TADF-OLEDs.

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KW - Solution process

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KW - Thermally activated delayed fluorescence

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