Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence oleds exhibiting high efficiency and low roll-off

Mallesham Godumala; Jiwon Yoon; Chiho Lee; Ji Eun Jeong; Sungnam Park; Han Young Woo; Min Ju Cho; Dong Hoon Choi

doi:10.1039/c9cc05983k

Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence oleds exhibiting high efficiency and low roll-off

Mallesham Godumala, Jiwon Yoon, Chiho Lee, Ji Eun Jeong, Sungnam Park, Han Young Woo, Min Ju Cho, Dong Hoon Choi

Department of Chemistry

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

12 Citations (Scopus)

Abstract

This study reports the design, synthesis, and characterization of two new bipolar host materials, DCzCP and TCzCP. Both materials were implemented as hosts by doping a known green thermally activated delayed fluorescent (TADF) emitter (t4CzIPN) in solution-processable OLEDs. DCzCP-based devices afford the best performance with the maximum external quantum efficiency (EQE) of 21.2%. Notably, the EQE was maintained at 20.7% and 19.7% at a practical luminance of 500 cd m^-2 and 1000 cd m^-2, respectively, demonstrating very small roll-off.

Original language	English
Pages (from-to)	12952-12955
Number of pages	4
Journal	Chemical Communications
Volume	55
Issue number	86
DOIs	https://doi.org/10.1039/c9cc05983k
Publication status	Published - 2019

ASJC Scopus subject areas

Catalysis
Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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title = "Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence oleds exhibiting high efficiency and low roll-off",

abstract = "This study reports the design, synthesis, and characterization of two new bipolar host materials, DCzCP and TCzCP. Both materials were implemented as hosts by doping a known green thermally activated delayed fluorescent (TADF) emitter (t4CzIPN) in solution-processable OLEDs. DCzCP-based devices afford the best performance with the maximum external quantum efficiency (EQE) of 21.2%. Notably, the EQE was maintained at 20.7% and 19.7% at a practical luminance of 500 cd m-2 and 1000 cd m-2, respectively, demonstrating very small roll-off.",

author = "Mallesham Godumala and Jiwon Yoon and Chiho Lee and Jeong, {Ji Eun} and Sungnam Park and Woo, {Han Young} and Cho, {Min Ju} and Choi, {Dong Hoon}",

note = "Funding Information: The authors acknowledge the financial support from the National Research Foundation of Korea (NRF2019R1A2C2002647, NRF2019R1A6A1A11044070) and also thank the Korea Basic Science Institute in Seoul for allowing us to use the MALDI-TOF MS instrument. Publisher Copyright: This journal is {\textcopyright} The Royal Society of Chemistry.",

year = "2019",

doi = "10.1039/c9cc05983k",

language = "English",

volume = "55",

pages = "12952--12955",

journal = "Chemical Communications",

issn = "1359-7345",

publisher = "Royal Society of Chemistry",

number = "86",

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TY - JOUR

T1 - Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence oleds exhibiting high efficiency and low roll-off

AU - Godumala, Mallesham

AU - Yoon, Jiwon

AU - Lee, Chiho

AU - Jeong, Ji Eun

AU - Park, Sungnam

AU - Woo, Han Young

AU - Cho, Min Ju

AU - Choi, Dong Hoon

N1 - Funding Information: The authors acknowledge the financial support from the National Research Foundation of Korea (NRF2019R1A2C2002647, NRF2019R1A6A1A11044070) and also thank the Korea Basic Science Institute in Seoul for allowing us to use the MALDI-TOF MS instrument. Publisher Copyright: This journal is © The Royal Society of Chemistry.

PY - 2019

Y1 - 2019

N2 - This study reports the design, synthesis, and characterization of two new bipolar host materials, DCzCP and TCzCP. Both materials were implemented as hosts by doping a known green thermally activated delayed fluorescent (TADF) emitter (t4CzIPN) in solution-processable OLEDs. DCzCP-based devices afford the best performance with the maximum external quantum efficiency (EQE) of 21.2%. Notably, the EQE was maintained at 20.7% and 19.7% at a practical luminance of 500 cd m-2 and 1000 cd m-2, respectively, demonstrating very small roll-off.

AB - This study reports the design, synthesis, and characterization of two new bipolar host materials, DCzCP and TCzCP. Both materials were implemented as hosts by doping a known green thermally activated delayed fluorescent (TADF) emitter (t4CzIPN) in solution-processable OLEDs. DCzCP-based devices afford the best performance with the maximum external quantum efficiency (EQE) of 21.2%. Notably, the EQE was maintained at 20.7% and 19.7% at a practical luminance of 500 cd m-2 and 1000 cd m-2, respectively, demonstrating very small roll-off.

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U2 - 10.1039/c9cc05983k

DO - 10.1039/c9cc05983k

M3 - Article

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AN - SCOPUS:85074117950

SN - 1359-7345

VL - 55

SP - 12952

EP - 12955

JO - Chemical Communications

JF - Chemical Communications

IS - 86

ER -

Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence oleds exhibiting high efficiency and low roll-off

Abstract

ASJC Scopus subject areas

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