Platinum(II) cyclometallates featuring broad emission bands and their applications in color-tunable OLEDs and high color-rendering WOLEDs

Guiping Tan; Shuming Chen; Chi Ho Siu; Adam Langlois; Yongfu Qiu; Hongbo Fan; Cheuk Lam Ho; Pierre D. Harvey; Yih Hsing Lo; Li Liu; Wai Yeung Wong

doi:10.1039/c6tc01594h

Platinum(II) cyclometallates featuring broad emission bands and their applications in color-tunable OLEDs and high color-rendering WOLEDs

Guiping Tan, Shuming Chen^*, Chi Ho Siu, Adam Langlois, Yongfu Qiu, Hongbo Fan^*, Cheuk Lam Ho^*, Pierre D. Harvey^*, Yih Hsing Lo^*, Li Liu^*, Wai Yeung Wong^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

48 Citations (Scopus)

Abstract

Two phosphorescent platinum(ii) cyclometallated complexes with phenoxy groups (1 and 2) have been developed. The modified organic ligands derived by combining the phenoxy moiety and 2-phenylpyridine conferred them with a more flexible structure, leading to superior intermolecular interaction properties of the resulting Pt(ii) metallophosphors. Because of the excimer formation induced by Pt(ii) complexes 1 and 2, the emission color can be tuned over a wide range from cyan to orange by simply increasing the concentration of the Pt(ii) metallophosphors. Inspired by their broad emission band, color tunability and outstanding electroluminescence (EL) performance, these two Pt(ii) phosphors complemented with blue fluorescent emitter 4,4′-bis(9-ethyl-3-carbazovinylene)-1,1′-biphenyl (BCzVBi) were employed in manufacturing high color-rendering white organic light-emitting devices (WOLEDs). In such simple two-emitter systems, 1-based WOLEDs exhibited reasonable EL performance with an external quantum efficiency (η_ext) of 11.7%, luminance efficiency (η_L) of 29.1 cd A^-1, power efficiency (η_p) of 16.9 lm W^-1 and color rendering index (CRI) of 77, whereas 2-based WOLEDs demonstrated an η_ext of 10%, η_L of 21.7 cd A^-1, η_p of 10.7 lm W^-1 and CRI of 88.

Original language	English
Pages (from-to)	6016-6026
Number of pages	11
Journal	Journal of Materials Chemistry C
Volume	4
Issue number	25
Early online date	23 May 2016
DOIs	https://doi.org/10.1039/c6tc01594h
Publication status	Published - 7 Jul 2016

Scopus Subject Areas

General Chemistry
Materials Chemistry

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10.1039/c6tc01594h

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@article{d531f393a179414bbe07f7d51777a517,

title = "Platinum(II) cyclometallates featuring broad emission bands and their applications in color-tunable OLEDs and high color-rendering WOLEDs",

abstract = "Two phosphorescent platinum(ii) cyclometallated complexes with phenoxy groups (1 and 2) have been developed. The modified organic ligands derived by combining the phenoxy moiety and 2-phenylpyridine conferred them with a more flexible structure, leading to superior intermolecular interaction properties of the resulting Pt(ii) metallophosphors. Because of the excimer formation induced by Pt(ii) complexes 1 and 2, the emission color can be tuned over a wide range from cyan to orange by simply increasing the concentration of the Pt(ii) metallophosphors. Inspired by their broad emission band, color tunability and outstanding electroluminescence (EL) performance, these two Pt(ii) phosphors complemented with blue fluorescent emitter 4,4′-bis(9-ethyl-3-carbazovinylene)-1,1′-biphenyl (BCzVBi) were employed in manufacturing high color-rendering white organic light-emitting devices (WOLEDs). In such simple two-emitter systems, 1-based WOLEDs exhibited reasonable EL performance with an external quantum efficiency (ηext) of 11.7%, luminance efficiency (ηL) of 29.1 cd A-1, power efficiency (ηp) of 16.9 lm W-1 and color rendering index (CRI) of 77, whereas 2-based WOLEDs demonstrated an ηext of 10%, ηL of 21.7 cd A-1, ηp of 10.7 lm W-1 and CRI of 88.",

author = "Guiping Tan and Shuming Chen and Siu, {Chi Ho} and Adam Langlois and Yongfu Qiu and Hongbo Fan and Ho, {Cheuk Lam} and Harvey, {Pierre D.} and Lo, {Yih Hsing} and Li Liu and Wong, {Wai Yeung}",

note = "Funding Information: This work was financially supported by the National Basic Research Program of China (973 Project 2013CB834702), Areas of Excellence Scheme, University Grants Committee of HKSAR (Project No. AoE/P-03/08), Hong Kong Research Grants Council (HKBU12304715) and Hong Kong Baptist University (FRG1/14-15/084). Dr Guiping Tan acknowledges the financial support from the Department of Education of Guangdong Province (No. 2014KQNCX219) and Guangdong Natural Science Foundation (No. 2015A030310242); Dr Yongfu Qiu acknowledges the financial support from the National Natural Science Foundation of China (No. 51206029). PDH thanks the Natural Sciences and Engineering Research Council of Canada (NSERC), le {"}Fonds Qu?b?cois de la Recherche sur la Nature et les Technologies (FQRNT){"} the {"}Centre d'Etudes des Mat?riaux Optiques et Photoniques de l'Universit? de Sherbrooke (CEMOPUS){"}. LL thanks the Hubei Province High-End Talent Training Program for financial support.",

year = "2016",

month = jul,

day = "7",

doi = "10.1039/c6tc01594h",

language = "English",

volume = "4",

pages = "6016--6026",

journal = "Journal of Materials Chemistry C",

issn = "2050-7526",

publisher = "Royal Society of Chemistry",

number = "25",

}

TY - JOUR

T1 - Platinum(II) cyclometallates featuring broad emission bands and their applications in color-tunable OLEDs and high color-rendering WOLEDs

AU - Tan, Guiping

AU - Chen, Shuming

AU - Siu, Chi Ho

AU - Langlois, Adam

AU - Qiu, Yongfu

AU - Fan, Hongbo

AU - Ho, Cheuk Lam

AU - Harvey, Pierre D.

AU - Lo, Yih Hsing

AU - Liu, Li

AU - Wong, Wai Yeung

N1 - Funding Information: This work was financially supported by the National Basic Research Program of China (973 Project 2013CB834702), Areas of Excellence Scheme, University Grants Committee of HKSAR (Project No. AoE/P-03/08), Hong Kong Research Grants Council (HKBU12304715) and Hong Kong Baptist University (FRG1/14-15/084). Dr Guiping Tan acknowledges the financial support from the Department of Education of Guangdong Province (No. 2014KQNCX219) and Guangdong Natural Science Foundation (No. 2015A030310242); Dr Yongfu Qiu acknowledges the financial support from the National Natural Science Foundation of China (No. 51206029). PDH thanks the Natural Sciences and Engineering Research Council of Canada (NSERC), le "Fonds Qu?b?cois de la Recherche sur la Nature et les Technologies (FQRNT)" the "Centre d'Etudes des Mat?riaux Optiques et Photoniques de l'Universit? de Sherbrooke (CEMOPUS)". LL thanks the Hubei Province High-End Talent Training Program for financial support.

PY - 2016/7/7

Y1 - 2016/7/7

N2 - Two phosphorescent platinum(ii) cyclometallated complexes with phenoxy groups (1 and 2) have been developed. The modified organic ligands derived by combining the phenoxy moiety and 2-phenylpyridine conferred them with a more flexible structure, leading to superior intermolecular interaction properties of the resulting Pt(ii) metallophosphors. Because of the excimer formation induced by Pt(ii) complexes 1 and 2, the emission color can be tuned over a wide range from cyan to orange by simply increasing the concentration of the Pt(ii) metallophosphors. Inspired by their broad emission band, color tunability and outstanding electroluminescence (EL) performance, these two Pt(ii) phosphors complemented with blue fluorescent emitter 4,4′-bis(9-ethyl-3-carbazovinylene)-1,1′-biphenyl (BCzVBi) were employed in manufacturing high color-rendering white organic light-emitting devices (WOLEDs). In such simple two-emitter systems, 1-based WOLEDs exhibited reasonable EL performance with an external quantum efficiency (ηext) of 11.7%, luminance efficiency (ηL) of 29.1 cd A-1, power efficiency (ηp) of 16.9 lm W-1 and color rendering index (CRI) of 77, whereas 2-based WOLEDs demonstrated an ηext of 10%, ηL of 21.7 cd A-1, ηp of 10.7 lm W-1 and CRI of 88.

AB - Two phosphorescent platinum(ii) cyclometallated complexes with phenoxy groups (1 and 2) have been developed. The modified organic ligands derived by combining the phenoxy moiety and 2-phenylpyridine conferred them with a more flexible structure, leading to superior intermolecular interaction properties of the resulting Pt(ii) metallophosphors. Because of the excimer formation induced by Pt(ii) complexes 1 and 2, the emission color can be tuned over a wide range from cyan to orange by simply increasing the concentration of the Pt(ii) metallophosphors. Inspired by their broad emission band, color tunability and outstanding electroluminescence (EL) performance, these two Pt(ii) phosphors complemented with blue fluorescent emitter 4,4′-bis(9-ethyl-3-carbazovinylene)-1,1′-biphenyl (BCzVBi) were employed in manufacturing high color-rendering white organic light-emitting devices (WOLEDs). In such simple two-emitter systems, 1-based WOLEDs exhibited reasonable EL performance with an external quantum efficiency (ηext) of 11.7%, luminance efficiency (ηL) of 29.1 cd A-1, power efficiency (ηp) of 16.9 lm W-1 and color rendering index (CRI) of 77, whereas 2-based WOLEDs demonstrated an ηext of 10%, ηL of 21.7 cd A-1, ηp of 10.7 lm W-1 and CRI of 88.

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U2 - 10.1039/c6tc01594h

DO - 10.1039/c6tc01594h

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AN - SCOPUS:84976393643

SN - 2050-7526

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JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

IS - 25

ER -

Platinum(II) cyclometallates featuring broad emission bands and their applications in color-tunable OLEDs and high color-rendering WOLEDs

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