journal article·2019-03-27Open access

Bipolar Blue Host Emitter with Unity Quantum Yield Allows Full Exciton Radiation in Single-Emissive-Layer Hybrid White Organic Light-Emitting Diodes

Chen Cao, Wen-Cheng Chen, Jia-Xiong Chen, Lei Yang, Xue-Zhi Wang, Hu Yang, Bin Huang, Ze-Lin Zhu, Qing-Xiao Tong, Chun-Sing Lee

ACS Applied Materials & Interfaces· Volume 11· Issue 12

Abstract

Phosphorescence/fluorescence hybrid white organic light-emitting diodes (OLEDs) are highly appealing for solid-state lighting. One major challenge is how to fully utilize the electrically generated excitons for light output. Herein, an efficient strategy to realize full exciton radiation is successfully revealed by a judicious molecular design and suitable device engineering. A blue host emitter TP-PPI is designed and synthesized, exhibiting a near 100% photoluminescence quantum yield and a high triplet energy level, enabling high-performance blue fluorescence and sensitization of a yellow phosphorescent dopant. Full exciton radiation in hybrid white OLEDs is demonstrated with a single emitting layer formed by doping a yellow phosphor (PO-01) into TP-PPI. Near 100% exciton utilization and state-of-the-art external quantum efficiency of 27.5% are achieved with the high-efficiency blue-emitting host and an electron-trap engineered device architecture.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Organic Light-Emitting Diodes Research · Luminescence and Fluorescent Materials · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, 243 University Road, Shantou, Guangdong 515063, P. R. China

Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, Hong Kong SAR & City University of Hong Kong Shenzhen Research Institute, Shenzhen, Guangdong 518057, P. R. China

College of Life Sciences and Chemistry, Jiangsu Key Laboratory of Biofunctional Molecule, Institute of New Materials for Vehicles, Jiangsu Second Normal University, Nanjing 210013, P. R. China

Funding

National Natural Science Foundation of China · Ministry of Science and Technology of the People's Republic of China

References (53)

Show source-provided references
1. Chiba T. · 2018 · 1
2. 10.1039/c2tc00584k10.1039/c2tc00584k ↗
3. 10.1063/1.11512610.1063/1.115126 ↗
4. 10.1038/nature0800310.1038/nature08003 ↗
5. 10.1038/nature0464510.1038/nature04645 ↗
6. 10.1016/j.mattod.2014.04.00210.1016/j.mattod.2014.04.002 ↗
7. 10.1002/adfm.20080150310.1002/adfm.200801503 ↗
8. 10.1021/acsami.6b0762910.1021/acsami.6b07629 ↗
9. 10.1016/j.orgel.2010.07.01510.1016/j.orgel.2010.07.015 ↗
10. 10.1002/adma.20130477910.1002/adma.201304779 ↗
11. 10.1002/adfm.20150336810.1002/adfm.201503368 ↗
12. 10.1002/adma.20120112410.1002/adma.201201124 ↗
13. 10.1002/adma.20150289710.1002/adma.201502897 ↗
14. 10.1039/C8SC00282G10.1039/C8SC00282G ↗
15. 10.1002/adfm.20170131410.1002/adfm.201701314 ↗
16. 10.1002/adom.20140015410.1002/adom.201400154 ↗
17. 10.1063/1.327340710.1063/1.3273407 ↗
18. 10.1039/C8TC02628A10.1039/C8TC02628A ↗
19. 10.1002/adfm.20170700210.1002/adfm.201707002 ↗
20. 10.1021/acsami.8b0746210.1021/acsami.8b07462 ↗
21. 10.1002/adom.20170085510.1002/adom.201700855 ↗
22. 10.1021/acsami.6b1463810.1021/acsami.6b14638 ↗
23. 10.1002/adom.20180025810.1002/adom.201800258 ↗
24. 10.1002/adfm.20110058610.1002/adfm.201100586 ↗
25. 10.1039/C7TC04972B10.1039/C7TC04972B ↗
26. 10.1002/adom.20170049810.1002/adom.201700498 ↗
27. 10.1002/adom.20180043710.1002/adom.201800437 ↗
28. 10.1002/adom.20170041510.1002/adom.201700415 ↗
29. 10.1021/acsami.8b0941810.1021/acsami.8b09418 ↗
30. 10.1039/C6SC05619A10.1039/C6SC05619A ↗
31. 10.1166/sam.2015.226410.1166/sam.2015.2264 ↗
32. 10.1021/acs.chemmater.5b0268510.1021/acs.chemmater.5b02685 ↗
33. Steed J. W. · 2013
34. 10.1002/adom.20140007810.1002/adom.201400078 ↗
35. 10.1002/adfm.20130290710.1002/adfm.201302907 ↗
36. 10.1002/adfm.20150216310.1002/adfm.201502163 ↗
37. 10.1002/adfm.20170581310.1002/adfm.201705813 ↗
38. 10.1039/C6TC01689H10.1039/C6TC01689H ↗
39. 10.1016/j.orgel.2016.09.00410.1016/j.orgel.2016.09.004 ↗
40. 10.1021/acsami.7b0654710.1021/acsami.7b06547 ↗
41. 10.1002/adom.20150025810.1002/adom.201500258 ↗
42. 10.1016/j.orgel.2014.11.02410.1016/j.orgel.2014.11.024 ↗
43. 10.1002/adfm.20130392610.1002/adfm.201303926 ↗
44. 10.1021/am508110610.1021/am5081106 ↗
45. 10.1063/1.171203610.1063/1.1712036 ↗
46. 10.1143/JJAP.46.L1010.1143/JJAP.46.L10 ↗
47. 10.1021/acsami.5b1078310.1021/acsami.5b10783 ↗
48. 10.1039/C5TC02050F10.1039/C5TC02050F ↗
49. 10.1039/C5TC01373A10.1039/C5TC01373A ↗
50. 10.1021/cm504441v10.1021/cm504441v ↗
51. 10.1109/2944.66948110.1109/2944.669481 ↗
52. 10.1063/1.162463910.1063/1.1624639 ↗
53. 10.1021/cm403160p10.1021/cm403160p ↗