Transient and d.c. analysis of the operation mechanism of light-emitting electrochemical cells
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
15/08/2013
15/08/2013
2012
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| Resumo |
Light-emitting electrochemical cells (LECs) made of electroluminescent polymers were studied by d.c. and transient current-voltage and luminance-voltage measurements to elucidate the operation mechanisms of this kind of device. The time and external voltage necessary to form electrical double layers (EDLs) at the electrode interfaces could be determined from the results. In the low-and intermediate-voltage ranges (below 1.1 V), the ionic transport and the electronic diffusion dominate the current, being the device operation better described by an electrodynamic model. For higher voltages, electrochemical doping occurs, giving rise to the formation of a p-i-n junction, according to an electrochemical doping model. Copyright (C) EPLA, 2012 Brazilian agency FAPESP Brazilian agency FAPESP Brazilian agency CNPq Brazilian agency CNPq National Institute for Science and Technology on Organic Electronics (INEO) National Institute for Science and Technology on Organic Electronics (INEO) CNPq CNPq CAPES CAPES |
| Identificador |
EPL, MULHOUSE, v. 100, n. 1, p. 18001-p1-18001-p4, Oct. 2012 0295-5075 http://www.producao.usp.br/handle/BDPI/32570 10.1209/0295-5075/100/18001 |
| Idioma(s) |
eng |
| Publicador |
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY MULHOUSE |
| Relação |
EPL |
| Direitos |
openAccess Copyright EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY |
| Palavras-Chave | #ELECTROLUMINESCENT DEVICES #DIODES #EFFICIENT #PHYSICS, MULTIDISCIPLINARY |
| Tipo |
article original article publishedVersion |
