ICCAS OpenIR
Robust Tris-Cyclometalated Iridium(III) Phosphors with Ligands for Effective Charge Carrier Injection/Transport: Synthesis, Redox, Photophysical, and Electrophosphorescent Behavior
Zhou, Guijiang1,2; Wang, Qi3; Ho, Cheuk-Lam1,2; Wong, Wai-Yeung1,2; Ma, Dongge3; Wang, Lixiang3; Lin, Zhenyang4
2008
Source PublicationCHEMISTRY-AN ASIAN JOURNAL
ISSN1861-4728
Volume3Issue:10Pages:1830-1841
AbstractWith the target to design and develop new functionalized green triplet light emitters that possess distinctive electronic properties for robust and highly efficient phosphorescent organic light-emitting diodes (PHOLEDs), a series of bluish-green to yellow-green phosphorescent tris-cyclometalated homoleptic iridium(III) complexes [Ir(ppy-X)(3)] (X=SiPh3, GePh3, NPh2, POPh2, OPh, SPh, SO2Ph, Hppy=2-phenylpyridine) have been synthesized and fully characterized by spectroscopic, redox, and photophysical methods. By chemically manipulating the lowest triplet-state character of Ir(ppy)(3) with some functional main-group 14-16 moieties on the phenyl ring of ppy, a new family of metallophosphors with high-emission quantum yields, short triplet-state lifetimes, and good hole-injection/hole-transporting or electron-injection/electron-transporting properties can be obtained. Remarkably, all of these Ir-III complexes show outstanding electrophosphorescent performance in multi-layer doped devices that surpass that of the state-of-the-art green-emitting dopant Ir(ppy)(3). The devices described herein can reach the maximum external quantum efficiency (eta(ext)) of 12.3%, luminance efficiency (eta(L)) of 50.8 cd A(-1), power efficiency (eta(p)) of 36.9 Lm W-1 for [Ir(ppy-SiPh3)(3)], 13.9%, 60.8 cd A(-1), 49.1 Lm W-1 for [Ir(ppy-NPh2)(3)], and 10.1%, 37.6 cd A(-1), 26.1 Lm W-1 for [Ir(ppy-SO2Ph)(3)]. These results provide a completely new and effective strategy for carrier injection into the electrophosphor to afford high-performance PHOLEDs suitable for various display applications.
KeywordElectron Transport Iridium Main Group Elements Phosphorescence Uv/vis Spectroscopy
DOI10.1002/asia.200800074
Indexed BySCI
Language英语
WOS IDWOS:000259968700009
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64812
Collection中国科学院化学研究所
Corresponding AuthorWong, Wai-Yeung
Affiliation1.Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Hong Kong, Peoples R China
2.Hong Kong Baptist Univ, Ctr Adv Luminescence Mat, Kowloon Tong, Hong Kong, Peoples R China
3.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
4.Hong Kong Univ Sci & Technol, Dept Chem, Hong Kong, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Guijiang,Wang, Qi,Ho, Cheuk-Lam,et al. Robust Tris-Cyclometalated Iridium(III) Phosphors with Ligands for Effective Charge Carrier Injection/Transport: Synthesis, Redox, Photophysical, and Electrophosphorescent Behavior[J]. CHEMISTRY-AN ASIAN JOURNAL,2008,3(10):1830-1841.
APA Zhou, Guijiang.,Wang, Qi.,Ho, Cheuk-Lam.,Wong, Wai-Yeung.,Ma, Dongge.,...&Lin, Zhenyang.(2008).Robust Tris-Cyclometalated Iridium(III) Phosphors with Ligands for Effective Charge Carrier Injection/Transport: Synthesis, Redox, Photophysical, and Electrophosphorescent Behavior.CHEMISTRY-AN ASIAN JOURNAL,3(10),1830-1841.
MLA Zhou, Guijiang,et al."Robust Tris-Cyclometalated Iridium(III) Phosphors with Ligands for Effective Charge Carrier Injection/Transport: Synthesis, Redox, Photophysical, and Electrophosphorescent Behavior".CHEMISTRY-AN ASIAN JOURNAL 3.10(2008):1830-1841.
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