Novel carbazole-acridine-based hole transport polymer for low turn-on voltage of green quantum dot light-emitting diodes

Chai Won Kim; Ji Hye Lee; Seunguk Cho; Hyung Jong Kim; Jinhyo Hwang; Yong Woo Kim; Dae Hyuk Choi; Min Ju Cho; Kwangyeol Lee; Dong Hoon Choi

doi:10.1039/d1py00497b

Novel carbazole-acridine-based hole transport polymer for low turn-on voltage of green quantum dot light-emitting diodes

Chai Won Kim, Ji Hye Lee, Seunguk Cho, Hyung Jong Kim, Jinhyo Hwang, Yong Woo Kim, Dae Hyuk Choi, Min Ju Cho, Kwangyeol Lee, Dong Hoon Choi

Department of Chemistry

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

3 Citations (Scopus)

Abstract

Herein, a novel hole transport polymer, P-CzAc, for solution-processed green quantum dot light-emitting diodes (QD-LEDs) was synthesized. P-CzAc consists of a polystyrene backbone and 10-(9H-carbazol-3-yl)-9,9-dimethyl-9,10-dihydroacridine as side-chain pendants. The design strategy aims to improve the hole transportability and achieve the low-lying highest occupied molecular orbital (HOMO) level for P-CzAc for reducing the charge injection barrier from the hole injection layer to the hole transport layer. P-CzAc showed good solubility in tetrahydrofuran, methylene chloride, and aromatic solvents, but high solvent tolerance for hexane and octane, similar to poly(N-vinylcarbazole) (PVK). Compared to PVK (HOMO = -5.58 eV), P-CzAc exhibited a relatively high-lying HOMO level of -5.33 eV. In particular, the hole mobility (μh) of P-CzAc was estimated to be 2.24 × 10-6 cm2 V-1 s-1, which is much higher than that of PVK (μh = 4.11 × 10-9 cm2 V-1 s-1). In solution-processed green QD-LEDs, the P-CzAc-based device exhibited a relatively low turn-on voltage (Von) of 2.8 V and a high maximum external quantum efficiency (EQE) of 11.6%. In comparison with a PVK-based device (Von = 4.4 V; EQE = 8.6%), the P-CzAc-based device is more efficient owing to the significant improvement in hole injection.

Original language	English
Pages (from-to)	4714-4721
Number of pages	8
Journal	Polymer Chemistry
Volume	12
Issue number	32
DOIs	https://doi.org/10.1039/d1py00497b
Publication status	Published - 2021 Aug 28

Bibliographical note

Funding Information:
This research was supported by LT Materials (Q1829031, 2019). It was also supported by the National Research Foundation of Korea (NRF2019R1A2C2002647, NRF2019R1A6A1A11044070). The authors also thanks to the Korea Basic Science Institute in Seoul for allowing us to use MALDI-TOF MS instrument and Institute for Basic Science (IBS, Korea) for allowing us to obtain nuclear magnetic resonance data (NMR; Ascend 500, Bruker).

Publisher Copyright:
© 2021 The Royal Society of Chemistry.

ASJC Scopus subject areas

Bioengineering
Biochemistry
Organic Chemistry
Polymers and Plastics

Access to Document

10.1039/d1py00497b

Cite this

@article{c325c799fd3e410d94ab4c1872a98293,

title = "Novel carbazole-acridine-based hole transport polymer for low turn-on voltage of green quantum dot light-emitting diodes",

abstract = "Herein, a novel hole transport polymer, P-CzAc, for solution-processed green quantum dot light-emitting diodes (QD-LEDs) was synthesized. P-CzAc consists of a polystyrene backbone and 10-(9H-carbazol-3-yl)-9,9-dimethyl-9,10-dihydroacridine as side-chain pendants. The design strategy aims to improve the hole transportability and achieve the low-lying highest occupied molecular orbital (HOMO) level for P-CzAc for reducing the charge injection barrier from the hole injection layer to the hole transport layer. P-CzAc showed good solubility in tetrahydrofuran, methylene chloride, and aromatic solvents, but high solvent tolerance for hexane and octane, similar to poly(N-vinylcarbazole) (PVK). Compared to PVK (HOMO = -5.58 eV), P-CzAc exhibited a relatively high-lying HOMO level of -5.33 eV. In particular, the hole mobility (μh) of P-CzAc was estimated to be 2.24 × 10-6 cm2 V-1 s-1, which is much higher than that of PVK (μh = 4.11 × 10-9 cm2 V-1 s-1). In solution-processed green QD-LEDs, the P-CzAc-based device exhibited a relatively low turn-on voltage (Von) of 2.8 V and a high maximum external quantum efficiency (EQE) of 11.6%. In comparison with a PVK-based device (Von = 4.4 V; EQE = 8.6%), the P-CzAc-based device is more efficient owing to the significant improvement in hole injection.",

author = "Kim, {Chai Won} and Lee, {Ji Hye} and Seunguk Cho and Kim, {Hyung Jong} and Jinhyo Hwang and Kim, {Yong Woo} and Choi, {Dae Hyuk} and Cho, {Min Ju} and Kwangyeol Lee and Choi, {Dong Hoon}",

note = "Funding Information: This research was supported by LT Materials (Q1829031, 2019). It was also supported by the National Research Foundation of Korea (NRF2019R1A2C2002647, NRF2019R1A6A1A11044070). The authors also thanks to the Korea Basic Science Institute in Seoul for allowing us to use MALDI-TOF MS instrument and Institute for Basic Science (IBS, Korea) for allowing us to obtain nuclear magnetic resonance data (NMR; Ascend 500, Bruker). Publisher Copyright: {\textcopyright} 2021 The Royal Society of Chemistry.",

year = "2021",

month = aug,

day = "28",

doi = "10.1039/d1py00497b",

language = "English",

volume = "12",

pages = "4714--4721",

journal = "Polymer Chemistry",

issn = "1759-9954",

publisher = "Royal Society of Chemistry",

number = "32",

}

TY - JOUR

T1 - Novel carbazole-acridine-based hole transport polymer for low turn-on voltage of green quantum dot light-emitting diodes

AU - Kim, Chai Won

AU - Lee, Ji Hye

AU - Cho, Seunguk

AU - Kim, Hyung Jong

AU - Hwang, Jinhyo

AU - Kim, Yong Woo

AU - Choi, Dae Hyuk

AU - Cho, Min Ju

AU - Lee, Kwangyeol

AU - Choi, Dong Hoon

N1 - Funding Information: This research was supported by LT Materials (Q1829031, 2019). It was also supported by the National Research Foundation of Korea (NRF2019R1A2C2002647, NRF2019R1A6A1A11044070). The authors also thanks to the Korea Basic Science Institute in Seoul for allowing us to use MALDI-TOF MS instrument and Institute for Basic Science (IBS, Korea) for allowing us to obtain nuclear magnetic resonance data (NMR; Ascend 500, Bruker). Publisher Copyright: © 2021 The Royal Society of Chemistry.

PY - 2021/8/28

Y1 - 2021/8/28

N2 - Herein, a novel hole transport polymer, P-CzAc, for solution-processed green quantum dot light-emitting diodes (QD-LEDs) was synthesized. P-CzAc consists of a polystyrene backbone and 10-(9H-carbazol-3-yl)-9,9-dimethyl-9,10-dihydroacridine as side-chain pendants. The design strategy aims to improve the hole transportability and achieve the low-lying highest occupied molecular orbital (HOMO) level for P-CzAc for reducing the charge injection barrier from the hole injection layer to the hole transport layer. P-CzAc showed good solubility in tetrahydrofuran, methylene chloride, and aromatic solvents, but high solvent tolerance for hexane and octane, similar to poly(N-vinylcarbazole) (PVK). Compared to PVK (HOMO = -5.58 eV), P-CzAc exhibited a relatively high-lying HOMO level of -5.33 eV. In particular, the hole mobility (μh) of P-CzAc was estimated to be 2.24 × 10-6 cm2 V-1 s-1, which is much higher than that of PVK (μh = 4.11 × 10-9 cm2 V-1 s-1). In solution-processed green QD-LEDs, the P-CzAc-based device exhibited a relatively low turn-on voltage (Von) of 2.8 V and a high maximum external quantum efficiency (EQE) of 11.6%. In comparison with a PVK-based device (Von = 4.4 V; EQE = 8.6%), the P-CzAc-based device is more efficient owing to the significant improvement in hole injection.

AB - Herein, a novel hole transport polymer, P-CzAc, for solution-processed green quantum dot light-emitting diodes (QD-LEDs) was synthesized. P-CzAc consists of a polystyrene backbone and 10-(9H-carbazol-3-yl)-9,9-dimethyl-9,10-dihydroacridine as side-chain pendants. The design strategy aims to improve the hole transportability and achieve the low-lying highest occupied molecular orbital (HOMO) level for P-CzAc for reducing the charge injection barrier from the hole injection layer to the hole transport layer. P-CzAc showed good solubility in tetrahydrofuran, methylene chloride, and aromatic solvents, but high solvent tolerance for hexane and octane, similar to poly(N-vinylcarbazole) (PVK). Compared to PVK (HOMO = -5.58 eV), P-CzAc exhibited a relatively high-lying HOMO level of -5.33 eV. In particular, the hole mobility (μh) of P-CzAc was estimated to be 2.24 × 10-6 cm2 V-1 s-1, which is much higher than that of PVK (μh = 4.11 × 10-9 cm2 V-1 s-1). In solution-processed green QD-LEDs, the P-CzAc-based device exhibited a relatively low turn-on voltage (Von) of 2.8 V and a high maximum external quantum efficiency (EQE) of 11.6%. In comparison with a PVK-based device (Von = 4.4 V; EQE = 8.6%), the P-CzAc-based device is more efficient owing to the significant improvement in hole injection.

UR - http://www.scopus.com/inward/record.url?scp=85113213872&partnerID=8YFLogxK

U2 - 10.1039/d1py00497b

DO - 10.1039/d1py00497b

M3 - Article

AN - SCOPUS:85113213872

SN - 1759-9954

VL - 12

SP - 4714

EP - 4721

JO - Polymer Chemistry

JF - Polymer Chemistry

IS - 32

ER -

Novel carbazole-acridine-based hole transport polymer for low turn-on voltage of green quantum dot light-emitting diodes

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this