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P‐170: Decomposable Alkali Compounds as Alkali Metal Precursors for Organic Light‐Emitting Diodes
Author(s) -
Duan Lian,
Li Yang,
Qiu Yong
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785437
Subject(s) - alkali metal , oled , cathode , materials science , thermal decomposition , diode , caesium , inorganic chemistry , quartz crystal microbalance , decomposition , chemical engineering , chemistry , optoelectronics , organic chemistry , nanotechnology , layer (electronics) , engineering , adsorption
Electron injection in organic light‐emitting diodes (OLEDs) can be improved by incorporation of alkali metals into the cathode structures. Some of the alkali compounds, such as alkali carbonates and nitrides, would decompose to form alkali metal during vacuum thermal evaporation. These materials can be incorporated into cathode structures to improve OLED performances. We developed an improved quartz crystal microbalance method to quantitatively investigate the decomposition of these alkali compounds in situ. We found that Cs 2 CO 3 and Li 3 N are ideal alkali metal precursors for OLEDs.