Abstract
Polymer light-emitting electrochemical cell (LEC) is composed of a conjugated polymer(CP)/polymer electrolyte blend film sandwiched between an ITO anode and an Al cathode. When a bias voltage greater than Eg/e (where Eg is the energy gap of the CP, e is the electron charge) is applied on the two electrodes, the CP in the polymer blend film at the anode side will be oxidized (to form a p-doped region), and that at the cathode side will be reduced (to form a n-doped region), then a p-i-n junction will be produced. Light-emission occurs in the intrinsic region between the p- and n- doped layers. In comparison with the single layered polymer light-emitting diode (PLED), LEC possesses the advantages of low turn-on voltage and high quantum efficiency of its electroluminescence. But there are some drawbacks in the LEC, including slow response due to the slow ionic motion and the phase separation problem between the CP and the ionic-conducting polymer (such as PEO). Our research on the LEC focused on the electrochemical studies of the LEC and on the improvement of the device performance by overcoming the drawbacks of the LEC.
Keywords
Polymer light-emitting electrochemical cell, Luminescent polymers, Electrochemistry, Ac impedance, Ionic liquids
Publication Date
2005-02-28
Online Available Date
2005-02-28
Revised Date
2004-07-26
Received Date
2004-05-16
Recommended Citation
Yong-fang LI.
Studies on Polymer Light-emitting Electrochemical Cells ——Introduction of the Studies on the Electrochemistry of Conducting Polymers in CAS Key Laboratory of Organic Solids (Ⅱ)[J]. Journal of Electrochemistry,
2005
,
11(1): 1-7.
DOI: 10.61558/2993-074X.1604
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol11/iss1/1
