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Tin Oxide as a Cathode in Organic Light‐Emitting Diodes
Author(s) -
Arias Ana C.,
de Lima Joaquim R.,
Hümmelgen Ivo A.
Publication year - 1998
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199803)10:5<392::aid-adma392>3.0.co;2-u
Subject(s) - materials science , indium tin oxide , cathode , optoelectronics , indium , diode , tin , layer (electronics) , oxide , light emitting diode , electrode , oled , tin oxide , nanotechnology , metallurgy , doping , electrical engineering , chemistry , engineering
An alternative to indium tin oxide (ITO) as the cathode in organic light‐emitting diodes (LEDs) is suggested: tin oxide. ITO can lead to problems of contamination of the polymer layer with indium, causing a reduction in radiant recombination and, in turn, diminished device brightness. The general consequences of the use of a semiconductor as the charge injection electrode material are analyzed, leading to the conclusion that the formation of an electron accumulation layer facilitates charge injection in the case of tin oxide.