Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 24, Pages 21784-21794Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b04675
Keywords
PhOLED; large-area patterning; inkjet printing; small molecular mixed host; TCTA; 3CzPFP
Funding
- Soft Chemical Materials Research Center for Organic-Inorganic Multi-Dimensional Structures - Gyeonggi Regional Research Center Program (GRRC Dankook) [2016-B01]
- MOTIE (Ministry of Trade, Industry Energy) [10067821]
- Basic Science Research Program of the National Research Foundation of Korea (NRF) - Ministry of Education [2016R1D1A1B03932499]
- National Research Foundation of Korea [2016R1D1A1B03932499] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
We have investigated the impact of the ink formulation on the properties of an inkjet-printed small molecular mixed host in a phosphorescent organic light-emitting diode (PhOLED). Host solubility, film roughness, and device efficiency improved by blending tris(4-carbazoyl-9-ylphenyl)amine (TCTA) with pyrido[3',2':4,5]furo[2,3-b]pyridine (3CzPFP). At a host ratio of 60:40 (TCTA/3CzPFP), the brightness increased by 33%, the efficiency roll-off at 1000 cd/m(2) dropped to well below 10%, and the luminance half-lifetime (LT50) improved by 80% in comparison to the device with a single host (100% TCTA). When the optimized ink was deposited by inkjet printing, a maximum external quantum efficiency of 8.9% and a current efficiency of 28.8 cd/A were achieved at 1000 cd/m(2) brightness. This amounted to around 84% of the efficiency of a spin-cast reference device. The obtained results provide a blueprint for designing enhanced PhOLEDs with inkjet-printed mixed hosts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
