Design of Hole Blocking Layer with Electron Transport Channels for High Performance Polymer Light-Emitting Diodes


  • This work is financially supported by the Ministry of Education through project 91E-FA04-2-4A and by the National Science Council through NSC 95-2752-E-007-008-PAE. Supporting Information is available online from Wiley InterScience or from the authors.


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A novel dual-functional composite layer composed of a high ionization potential nonconjugated polymer or conjugated molecular material and an inorganic salt of a low work function metal is demonstrated. The composite provides superior hole blocking along with promising electron transport capability and results in good device performance for two model electroluminescent polymers, PFO and MEH-PPV.