Organic, polymer and organic/inorganic hybrid light-emitting devices based on phosphorescent fluorinated platinum(II) porphyrin

Abstract

Efficient and highly saturated red organic, polymer and white organic/inorganic hybrid light-emitting devices (OLEDs, PLEDs and OIHLEDs) employing platinum(II) meso-tetrakis(pentafluorophenyl) porphyrin (PtF 20TPP) are reported. The presence of fluorine atoms on the periphery of porphyrin ring suppresses the self-quenching behavior and improves the electron mobility, solubility, and stability of PtF20TPP. Both the PLEDs and OLEDs give a red emission with a peak maximum at 650 nm (full width at half maximum = 26 nm) and a shoulder at 705 nm. The maximum external quantum efficiency (ηext), luminous efficiency (ηL), and brightness of the 2.1 wt% PtF20TPP-doped PLED are 3.2%, 1.1 cd/A, 350 cd/m2 respectively; while those for the 4.0 wt% PtF 20TPP-doped OLEDs are 5.1%, 1.5 cd/A, 890 cd/m2. The efficiency and luminous power efficiency (ηP) of luminescence conversion of white OIHLEDs based on near-ultraviolet (n-UV) light GaN-LEDs as light source, tris-(8-hydroxyquinolato) aluminum (Alq3) as green emitter, and PtF20TPP as red emitter are 3.3% and 10 lm/W, respectively.