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Efficient green polymer light-emitting diodes with microcavity effect in electroluminescence spectrum but constant quantum efficiency

Xuezhong Jiang, Petra Herguth, Takafumi Sassa, Alex K.-Y. Jen

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Abstract

The efficient green polymer light-emitting diodes (PLD) which exhibited a strong microgravity effect in the electroluminescence (EL) spectrum were investigated. The EL spectra of the LEDs revealed a strong resonance effect with the thickness of the emitting layer varying from 30 to 280 nm. The turn-on voltage of the device was found to increase with the increasing thickness of the emitting layer. The results show that the brightness and the external quantum efficiency of the devices are independent of the thickness from 100 to 280 nm.
Original languageEnglish
Pages (from-to)3553-3555
JournalJournal of Applied Physics
Volume96
Issue number6
DOIs
Publication statusPublished - 15 Sept 2004
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

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