Premium
Light‐emitting devices based on solid electrolytes and polyelectrolytes
Author(s) -
Neher Dieter,
Grüner Johannes,
Cimrová Vera,
Schmidt Wolfgang,
Rulkens Rudy,
Lauter Ulrich
Publication year - 1998
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199807)9:7<461::aid-pat800>3.0.co;2-r
Subject(s) - materials science , polyelectrolyte , electrolyte , optoelectronics , light emitting diode , diode , luminescence , polymer , oled , ion , polymer electrolytes , nanotechnology , electrode , chemistry , ionic conductivity , composite material , organic chemistry , layer (electronics)
Abstract The properties of light‐emitting diodes (LEDs) based on organic layers containing mobile ions, so‐called light‐emitting electrochemical cells (LECs), are reviewed. These devices have some unique properties: their current–voltage characteristics are antisymmetric with respect to the origin and they emit light under both forward and reverse bias. The physical processes involved in the emission from LECs are discussed in terms of a thermodynamic model. Recent work on blends of luminescent and ion‐conducting polymers is summarized. In addition, the properties of novel single‐component LECs and polyelectrolyte‐based devices are presented. The results show that LECs with performances superior to that of conventional LED devices can be fabricated, but questions concerning the transient behavior and degradation mechanisms persist. © 1998 John Wiley & Sons, Ltd.