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Transparent amorphous oxide semiconductors for organic electronics: Application to inverted OLEDs
- Source :
- Proceedings of the National Academy of Sciences of the United States of America. 114(2)
- Publication Year :
- 2016
-
Abstract
- Efficient electron transfer between a cathode and an active organic layer is one key to realizing high-performance organic devices, which require electron injection/transport materials with very low work functions. We developed two wide-bandgap amorphous (a-) oxide semiconductors, a-calcium aluminate electride (a-C12A7:e) and a-zinc silicate (a-ZSO). A-ZSO exhibits a low work function of 3.5 eV and high electron mobility of 1 cm2/(V · s); furthermore, it also forms an ohmic contact with not only conventional cathode materials but also anode materials. A-C12A7:e has an exceptionally low work function of 3.0 eV and is used to enhance the electron injection property from a-ZSO to an emission layer. The inverted electron-only and organic light-emitting diode (OLED) devices fabricated with these two materials exhibit excellent performance compared with the normal type with LiF/Al. This approach provides a solution to the problem of fabricating oxide thin-film transistor-driven OLEDs with both large size and high stability.
- Subjects :
- 010302 applied physics
Organic electronics
Multidisciplinary
Materials science
business.industry
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Cathode
Amorphous solid
law.invention
Anode
chemistry.chemical_compound
Semiconductor
chemistry
law
0103 physical sciences
Physical Sciences
OLED
Optoelectronics
Electride
0210 nano-technology
business
Ohmic contact
Subjects
Details
- ISSN :
- 10916490
- Volume :
- 114
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Accession number :
- edsair.doi.dedup.....8f6013b770f151e168a95d68a26eb0e3