| Autor: |
Oyamada, Takahito, Sasabe, Hiroyuki, Adachi, Chihaya, Murase, Seiichiro, Tominaga, Tsuyoshi, Maeda, Chiharu |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 1/17/2005, Vol. 86 Issue 3, p033503, 3p, 5 Graphs |
| Abstrakt: |
We demonstrated efficient electron injection and transport in organic light-emitting diodes using an electron-transport layer (ETL) composed of a Cs and phenyldipyrenylphosphine oxide (POPy2) co-deposited layer. In particular, an ETL composed of a Cs:POPy2 layer with an atom:molar ratio of 1:2 demonstrated an extremely low driving voltage, resulting in a high current density of 100 mA/cm2 at an applied voltage of only 3.9 V. The results of Kelvin probe and absorption measurements indicated that the formation of a CsAl alloy layer at the Cs:POPy2/Al cathode interface and the charge-transfer complex between the Cs and POPy2 contributed to enhancing the efficiency of electron injection and transport, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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