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Room‐Temperature‐Phosphorescence‐Based Dissolved Oxygen Detection by Core‐Shell Polymer Nanoparticles Containing Metal‐Free Organic Phosphors

Yu, Youngchang ; Kwon, Min Sang ; Jung, Jaehun ; [et al.]

Wiley ; 2017

In: Angewandte Chemie International Edition Vol. 56, No. 51 ( 2017-12-18), p. 16207-16211

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In: Angewandte Chemie International Edition, Wiley, Vol. 56, No. 51 ( 2017-12-18), p. 16207-16211

Abstract: The highly sensitive optical detection of oxygen including dissolved oxygen (DO) is of great interest in various applications. We devised a novel room‐temperature‐phosphorescence (RTP)‐based oxygen detection platform by constructing core–shell nanoparticles with water‐soluble polymethyloxazoline shells and oxygen‐permeable polystyrene cores crosslinked with metal‐free purely organic phosphors. The resulting nanoparticles show a very high sensitivity for DO with a limit of detection (LOD) of 60 n m and can be readily used for oxygen quantification in aqueous environments as well as the gaseous phase.

Type of Medium: Online Resource

ISSN: 1433-7851 , 1521-3773

URL: Issue

URL: Article

DOI: 10.1002/anie.v56.51

DOI: 10.1002/anie.201708606

RVK:

VA 2100

Language: English

Publisher: Wiley

Publication Date: 2017

detail.hit.zdb_id: 2011836-3

detail.hit.zdb_id: 123227-7

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Room‐Temperature‐Phosphorescence‐Based Dissolved Oxygen Detection by Core‐Shell Polymer Nanoparticles Containing Metal‐Free Organic Phosphors

Yu, Youngchang ; Kwon, Min Sang ; Jung, Jaehun ; [et al.]

Wiley ; 2017

In: Angewandte Chemie Vol. 129, No. 51 ( 2017-12-18), p. 16425-16429

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In: Angewandte Chemie, Wiley, Vol. 129, No. 51 ( 2017-12-18), p. 16425-16429

Type of Medium: Online Resource

ISSN: 0044-8249 , 1521-3757

URL: Issue

URL: Article

DOI: 10.1002/ange.v129.51

DOI: 10.1002/ange.201708606

RVK:

VA 2100

RVK:

VN 5020

Language: English

Publisher: Wiley

Publication Date: 2017

detail.hit.zdb_id: 505868-5

detail.hit.zdb_id: 506609-8

detail.hit.zdb_id: 514305-6

detail.hit.zdb_id: 505872-7

detail.hit.zdb_id: 1479266-7

detail.hit.zdb_id: 505867-3

detail.hit.zdb_id: 506259-7

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Molecular Design Approach Managing Molecular Orbital Superposition for High Efficiency without Color Shift in Thermally Activated Delayed Fluorescent Organic Light‐Emitting Diodes

Kim, Mounggon ; Yoon, Seong‐Jun ; Han, Si Hyun ; [et al.]

Wiley ; 2019

In: Chemistry – A European Journal Vol. 25, No. 7 ( 2019-02), p. 1829-1834

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In: Chemistry – A European Journal, Wiley, Vol. 25, No. 7 ( 2019-02), p. 1829-1834

Abstract: Molecular design principles of thermally activated delayed fluorescent (TADF) emitters having a high quantum efficiency and a color tuning capability was investigated by synthesizing three TADF emitters with donors at different positions of a benzonitrile acceptor. The position rendering a large overlap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) enhances the quantum efficiency of the TADF emitter. Regarding the orbital overlap, donor attachments at 2‐ and 6‐positions of the benzonitrile were more beneficial than 3‐ and 5‐substitutions. Moreover, an additional attachment of a weak donor at the 4‐position further increased the quantum efficiency without decreasing the emission energy. Therefore, the molecular design strategy of substituting strong donors at the positions allowing a large molecular orbital overlap and an extra weak donor is a good approach to achieve both high quantum efficiency and a slightly increased emission energy.

Type of Medium: Online Resource

ISSN: 0947-6539 , 1521-3765

URL: Issue

URL: Article

DOI: 10.1002/chem.v25.7

DOI: 10.1002/chem.201805616

RVK:

VA 1120 ; VA 3507

Language: English

Publisher: Wiley

Publication Date: 2019

detail.hit.zdb_id: 1478547-X

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Molecular design of triazine and carbazole based host materials for blue phosphorescent organic emitting diodes

Kim, Mounggon ; Jeon, Sang Kyu ; Hwang, Seok-Ho ; [et al.]

Royal Society of Chemistry (RSC) ; 2015

In: Physical Chemistry Chemical Physics Vol. 17, No. 20 ( 2015), p. 13553-13558

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In: Physical Chemistry Chemical Physics, Royal Society of Chemistry (RSC), Vol. 17, No. 20 ( 2015), p. 13553-13558

Type of Medium: Online Resource

ISSN: 1463-9076 , 1463-9084

URL: Article

DOI: 10.1039/C5CP01676B

Language: English

Publisher: Royal Society of Chemistry (RSC)

Publication Date: 2015

detail.hit.zdb_id: 1476283-3

detail.hit.zdb_id: 1476244-4

detail.hit.zdb_id: 1460656-2

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Simultaneous improvement of emission color, singlet–triplet energy gap, and quantum efficiency of blue thermally activated delayed fluorescent emitters using a 1-carbazolylcarbazole based donor

Kim, Mounggon ; Choi, Jeong Min ; Lee, Jun Yeob

Royal Society of Chemistry (RSC) ; 2016

In: Chemical Communications Vol. 52, No. 65 ( 2016), p. 10032-10035

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In: Chemical Communications, Royal Society of Chemistry (RSC), Vol. 52, No. 65 ( 2016), p. 10032-10035

Type of Medium: Online Resource

ISSN: 1359-7345 , 1364-548X

URL: Article

DOI: 10.1039/C6CC04516B

Language: English

Publisher: Royal Society of Chemistry (RSC)

Publication Date: 2016

detail.hit.zdb_id: 1472881-3

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Improved power efficiency in deep blue phosphorescent organic light-emitting diodes using an acridine core based hole transport material

Kim, Mounggon ; Lee, Jun Yeob

Elsevier BV ; 2012

In: Organic Electronics Vol. 13, No. 7 ( 2012-7), p. 1245-1249

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In: Organic Electronics, Elsevier BV, Vol. 13, No. 7 ( 2012-7), p. 1245-1249

Type of Medium: Online Resource

ISSN: 1566-1199

URL: Article

DOI: 10.1016/j.orgel.2012.03.040

Language: English

Publisher: Elsevier BV

Publication Date: 2012

detail.hit.zdb_id: 2037332-6

SSG: 11

SSG: 12

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Design Strategy for 25% External Quantum Efficiency in Green and Blue Thermally Activated Delayed Fluorescent Devices

Lee, Dong Ryun ; Kim, Mounggon ; Jeon, Sang Kyu ; [et al.]

Wiley ; 2015

In: Advanced Materials Vol. 27, No. 39 ( 2015-10), p. 5861-5867

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In: Advanced Materials, Wiley, Vol. 27, No. 39 ( 2015-10), p. 5861-5867

Type of Medium: Online Resource

ISSN: 0935-9648 , 1521-4095

URL: Issue

URL: Article

DOI: 10.1002/adma.v27.39

DOI: 10.1002/adma.201502053

RVK:

UA 1538

Language: English

Publisher: Wiley

Publication Date: 2015

detail.hit.zdb_id: 1474949-X

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Synthesis of 3-substituted carbazole derivative as a host material for deep blue phosphorescent organic light-emitting diodes

Kim, Mounggon ; Lee, Jun Yeob

Elsevier BV ; 2013

In: Synthetic Metals Vol. 181 ( 2013-10), p. 18-22

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In: Synthetic Metals, Elsevier BV, Vol. 181 ( 2013-10), p. 18-22

Type of Medium: Online Resource

ISSN: 0379-6779

URL: Article

DOI: 10.1016/j.synthmet.2013.08.003

Language: English

Publisher: Elsevier BV

Publication Date: 2013

detail.hit.zdb_id: 2015168-8

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Donor–acceptor type material as a triplet host for high efficiency white phosphorescent organic light-emitting diodes

Kim, Mounggon ; Lee, Jun Yeob

Elsevier BV ; 2015

In: Synthetic Metals Vol. 199 ( 2015-01), p. 105-109

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In: Synthetic Metals, Elsevier BV, Vol. 199 ( 2015-01), p. 105-109

Type of Medium: Online Resource

ISSN: 0379-6779

URL: Article

DOI: 10.1016/j.synthmet.2014.11.018

Language: English

Publisher: Elsevier BV

Publication Date: 2015

detail.hit.zdb_id: 2015168-8

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Engineering the Substitution Position of Diphenylphosphine Oxide at Carbazole for Thermal Stability and High External Quantum Efficiency Above 30% in Blue Phosphorescent Organic Light‐Emitting Diodes

Kim, Mounggon ; Lee, Jun Yeob

Wiley ; 2014

In: Advanced Functional Materials Vol. 24, No. 26 ( 2014-07), p. 4164-4169

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In: Advanced Functional Materials, Wiley, Vol. 24, No. 26 ( 2014-07), p. 4164-4169

Abstract: A carbazole derivative substituted with two diphenylphosphine oxide groups at asymmetric positions of carbazole is synthesized and the substitution position is correlated with the photophysical properties and device performances of blue phosphorescent organic light‐emitting diodes. The carbazole type host with substituents at 2‐ and 5‐ positions of carbazole shows the merits of low driving voltage of 2‐position substitution, and high thermal stability and high quantum efficiency of 5‐ position substitution. Therefore, the carbazole type host exhibits excellent thermal and morphological stability up to 140 °C and record high quantum efficiency of 31.4% and power efficiency of 53.1 lm W ‐1 without any outcoupling enhancement and p‐ or n‐doped charge transport layer in blue phosphorescent organic light‐emitting diodes.

Type of Medium: Online Resource

ISSN: 1616-301X , 1616-3028

URL: Issue

URL: Article

DOI: 10.1002/adfm.v24.26

DOI: 10.1002/adfm.201304072

Language: English

Publisher: Wiley

Publication Date: 2014

detail.hit.zdb_id: 2029061-5

detail.hit.zdb_id: 2039420-2

SSG: 11

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