Improved electron injection in polymer light-emitting diodes using anionic conjugated polyelectrolyte
نویسندگان
چکیده
منابع مشابه
Conjugated zwitterionic polyelectrolyte as the charge injection layer for high-performance polymer light-emitting diodes.
A new zwitterionic conjugated polyelectrolyte without free counterions has been used as an electron injection material in polymer light-emitting diodes. Both the efficiency and maximum brightness were considerably improved in comparison with standard Ca cathode devices. The devices showed very fast response times, indicating that the improved performance is, in addition to hole blocking, due to...
متن کاملContact Injection into Polymer Light-Emitting Diodes
The variation of current I with voltage V for poly(phenylene vinylene) and other polymer light-emitting diodes has been attributed to carriers tunneling into broad conduction and valence bands. In actuality the electrons and holes tunnel into polaron levels and transport is by hopping among these levels. We show that for small injection the I-V characteristic is determined mainly by the image f...
متن کاملImproved Efficiency in Semiconducting Polymer Light-Emitting Diodes
3. R. Vu Huy Dat and C. Baumberger, Phys, Status Solidi 22, 67 (1967). 4. 1. H. Pratt, Proc. IEEE 59, 1440 (1971). 5. T. Nagatomo, T. Kosaka and O. Omoto, Ferroelectric 37,681 (1981). 6. K. Sreenivas, A. Mansingh and M. Sayer, J. Appl. Phys. 62, 4475 (1987). 7. Y. Shintani and O. Tada, J. Appl. Phys. 41, 2376 (1970). 8. T. L. Rose, E. M. Kelliher, A. N. Scoville and S. E. Stone, J. Appl. Phys. ...
متن کاملUniversity of Groningen Hole-enhanced electron injection from ZnO in inverted polymer light-emitting diodes
Metal oxides as ZnO provide an interesting alternative for conventional low work function metals as electron injection layer in organic light-emitting diodes (OLEDs). However, for most state-of-the-art OLED materials the high work function of ZnO leads to a large injection barrier for electrons. As a result the electron current in the OLED is largely limited by the contact, leading to a strong ...
متن کاملElectron traps in organic light-emitting diodes
This work presents the effects of electron traps in organic light-emitting diodes using a model which includes charge injection, transport, and recombination. For electron-only devices, the electron current is reduced by the traps for several orders of magnitude at fixed voltage, and the traps strongly increase the transient time. For bipolar devices, due to negative trapped charges, traps enha...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2008
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.2989133