Ultrahigh-efficiency solution-processed simplified small-molecule organic light-emitting diodes using universal host materials

Content Provider	Semantic Scholar
Author	Han, Tae-Hee Choi, Mi-Ri Jeon, Chan-Woo Kim, Yun-Hi Kwon, Soon-Ki Lee, Tae-Woo
Copyright Year	2016
Abstract	Although solution processing of small-molecule organic light-emitting diodes (OLEDs) has been considered as a promising alternative to standard vacuum deposition requiring high material and processing cost, the devices have suffered from low luminous efficiency and difficulty of multilayer solution processing. Therefore, high efficiency should be achieved in simple-structured small-molecule OLEDs fabricated using a solution process. We report very efficient solution-processed simple-structured small-molecule OLEDs that use novel universal electron-transporting host materials based on tetraphenylsilane with pyridine moieties. These materials have wide band gaps, high triplet energy levels, and good solution processabilities; they provide balanced charge transport in a mixed-host emitting layer. Orange-red (~97.5 cd/A, ~35.5% photons per electron), green (~101.5 cd/A, ~29.0% photons per electron), and white (~74.2 cd/A, ~28.5% photons per electron) phosphorescent OLEDs exhibited the highest recorded electroluminescent efficiencies of solution-processed OLEDs reported to date. We also demonstrate a solution-processed flexible solid-state lighting device as a potential application of our devices.
File Format	PDF HTM / HTML
DOI	10.1126/sciadv.1601428
PubMed reference number	27819053
Journal	Medline
Volume Number	2
Alternate Webpage(s)	https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/79/98/1601428.PMC5091357.pdf
Alternate Webpage(s)	http://advances.sciencemag.org/content/advances/2/10/e1601428.full.pdf
Alternate Webpage(s)	https://doi.org/10.1126/sciadv.1601428
Journal	Science Advances
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article