Journal
NEW JOURNAL OF CHEMISTRY
Volume 39, Issue 11, Pages 8467-8473Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nj01875g
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Funding
- Program RETOS of the Spanish Ministerio de Economia y Competitividad [TEC2013-47342-C2]
- R&D Program SINFOTON of the Comunidad de Madrid [S2013/MIT-2790]
- European COST Action [IC1208]
- Universidad Rey Juan Carlos-Banco de Santander (Excellence group QUINANOAP, Convocatoria de ayudas a la Actividad de Grupos de Excelencia Investigadora)
- Spanish Ministerio de Economia y Competitividad [CTQ2011-25172]
- Complutense University [GR3/14-910300]
- Programa de Financiacion de Universidad Complutense de Madrid-Santander Universidades (Spain)
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The photoluminescence and mechanochromic behaviour of the bis(3-(3,5-bis(dodecyloxy) phenyl)-(5-pyridin-2-yl) pyrazolate) platinum(II) complex PT12, selected from a series of Pt(II) compounds with N,N '-pyridylpyrazolate ligands, has been investigated. The electroluminescence properties of polymer OLEDs based on PT12-doped polyfluorene (PFO) are also described. Addition of PT12 induces the formation of the PFO beta-phase, a much more ordered phase with enhanced colour stability at high bias and high photoluminescence quantum efficiency. Additionally, the characteristic blue emission of PFO is red-shifted for PT12 concentrations equal to or higher than 3%. Depending on the dopant concentration and the applied current, the colour coordinates of these polymer OLEDs undergo a broad shift in the CIE colour space. In addition, through the strategic use of keto defect sites, white-emitting devices can be fabricated with a very small addition of PT12.
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