ICCAS OpenIR
Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes
Tao, Youtian; Wang, Qiang2; Yang, Chuluo1; Qin, Jingui1; Ma, Dingge2
2010-10-01
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume2Issue:10Pages:2813-2818
AbstractHigh-efficiency phosphorescent organic light-emitting diodes (PhOLEDs) have been achieved by using an ortho-linked triphenylamine/oxadiazole hybrid, namely p-TPA-o-OXD, as host material. The high HOMO level of the compound (5.25 eV) can facilitate efficient hole injection from 1, 4-bis[(1-naphthylphenyl)amino]biphenyl (NPB) layer to the emissive layer. As a result, low driving voltages and high power efficiencies have been attained as compared to the carbazole-based hosts with lower HOMO levels and higher injection barriers under similar device structures. By introducing 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBI) to replace 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)/tris(8-hydroxyquinoline)aluminum (Alq3) as hole blocking/electron transporting layer, followed by tuning the thicknesses of hole-transport NPB layer to manipulate the charge balance, high-efficiency PhOLEDs have been achieved, with maximum current efficiency/power efficiency/external quantum efficiency of 85.7 cd/A/99.7 lm/W/22.2% for green (ppy)(2)Ir(acac)-based devices, 55.2 cd/A/64.2 lm/W/19.0% for yellow (fbi)(2)Ir(acac)-based devices, and 11.4 cd/A/11.8 lm/W/14.8% for deep red (piq)(2)Ir(acac)-based devices. By inserting 10 nm of p-TPA-o-OXD as self-triplet exciton blocking layer between hole transporting and emissive layer to confine triplet excitons, device performances have been further improved In green PhOLED, with peak current efficiency/power efficiency/external quantum efficiency of 90.0 cd/A/97.7 lm/W/23.5%.
KeywordPhosphorescent Organic Light-emitting Diodes Host Charge Balance Triplet Energy Energy Level
DOI10.1021/am100495g
Indexed BySCI
Language英语
WOS IDWOS:000283463700023
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/70062
Collection中国科学院化学研究所
Corresponding AuthorYang, Chuluo
Affiliation1.Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Tao, Youtian,Wang, Qiang,Yang, Chuluo,et al. Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes[J]. ACS APPLIED MATERIALS & INTERFACES,2010,2(10):2813-2818.
APA Tao, Youtian,Wang, Qiang,Yang, Chuluo,Qin, Jingui,&Ma, Dingge.(2010).Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes.ACS APPLIED MATERIALS & INTERFACES,2(10),2813-2818.
MLA Tao, Youtian,et al."Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes".ACS APPLIED MATERIALS & INTERFACES 2.10(2010):2813-2818.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Tao, Youtian]'s Articles
[Wang, Qiang]'s Articles
[Yang, Chuluo]'s Articles
Baidu academic
Similar articles in Baidu academic
[Tao, Youtian]'s Articles
[Wang, Qiang]'s Articles
[Yang, Chuluo]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Tao, Youtian]'s Articles
[Wang, Qiang]'s Articles
[Yang, Chuluo]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.