Efficient single-layer yellow-light emitting-diodes with ladder-type poly(p-phenylene)/poly(decyl-thiophene) blends

Emil J. W. List*, Leo Holzer, S. Tasch, Günther Leising, U. Scherf, K. Müllen, M. Catellani, S. Luzzati

*Corresponding author for this work

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Abstract

We present the realisation of efficient polymer light emitting diodes (PLEDs) with yellow emission in a single-layer configuration. We found that the external electroluminescence-quantum efficiencies of PLEDs made of a blend of a blue emitting laddertype poly(p-phenylene) (m-LPPP) and small amounts of an orange emitting poly(decyl-thiophene) (PDT) are significantly improved to 4.2% compared with PLEDs fabricated of pure m-LPPP (2%). In this paper, electroluminescence and photoluminescence properties of different PLEDs consisting of m-LPPP and different amounts of PDT are compared. The results are discussed in terms of excitation energy transfer of Förster type and charge transfer.
Original languageEnglish
Pages (from-to)455-459
JournalSolid State Communications
Volume109
Issue number7
DOIs
Publication statusPublished - 1999

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