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White Dendrimer Organic Light Emitting Diodes: Exciton Formation and Transfer [in press]

Reventlow, Lorenz Graf von; Jiang, W.; Stoltzfus, D. M.; Russell, S. M.; Burn, P. L.; Colsmann, Alexander

Abstract:
In this work solution‐processed organic white‐light emitting diodes comprising a blend of red and blue phosphorescent dendrimers are presented. In contrast to common small molecule blended‐dye organic light emitting diodes (OLEDs), the bulky dendrons between the light emitting moieties increase the spacing and hamper the transfer of excitons between the dyes. The reduced transfer of the excitons from the blue dye to the red dye enables greater control over OLED color avoiding the issue in which small variations in the concentration of the red dye can dramatically change the emission color. Thus, the approach leads to enhanced manufacturing reproducibility. Transient electroluminescence measurements provide detailed insights into the charge carrier and exciton formation and transfer dynamics within the device.

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Verlagsausgabe §
DOI: 10.5445/IR/1000125817
Veröffentlicht am 10.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Lichttechnisches Institut (LTI)
Materialwissenschaftliches Zentrum für Energiesysteme (MZE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2195-1071
KITopen-ID: 1000125817
Erschienen in Advanced optical materials
Seiten Art.-Nr.: 2001289
Vorab online veröffentlicht am 25.10.2020
Nachgewiesen in Scopus
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