Article

[Performance of polymer light-emitting diodes with cathode modify layers PEO/LiF].

Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
Guang pu xue yu guang pu fen xi = Guang pu (impact factor: 0.84). 08/2007; 27(7):1276-8. pp.1276-8
Source: PubMed

ABSTRACT Polymer light-emitting diodes(PLEDs) devices based on MEH-PPV were fabricated. The performance of PLEDs device with inserting insulating layer PEO nserted between the metal cathode and emissive polymer was enhanced. Furthermore, when cathode Al was modified by PEO/LiF, the threshold, the luminescence intensity, the efficiency and stability of the device were improved significantly. Experiment results show that the improvement of the device performance is caused by the introduction of PEO. The PEO between the metal cathode and emissive polymer works as the carrier barrier for carriers, and the injection of holes is restrained by the accumulation of holes on the surface. Meanwhile, electron injection is enhanced, and the dissociation of exciton is reduced.

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Keywords

carrier barrier
 
carriers
 
cathode Al
 
dissociation
 
emissive polymer
 
emissive polymer works
 
Experiment results
 
holes
 
inserting
 
luminescence intensity
 
MEH-PPV
 
metal cathode
 
Polymer light-emitting diodes(PLEDs)
 

Xin Sun