Organic light emitting diodes (OLEDs) operating in the near-infrared spectral region are gaining growing relevance for emerging photonic technologies, such as lab-on-chip platforms for medical diagnostics, flexible self-medicated pads for photodynamic therapy, night vision and plastic-based telecommunications. The achievement of efficient near-infrared electroluminescence from solution-processed OLEDs is, however, an open challenge due to the low photoluminescence efficiency of most narrow-energy-gap organic emitters. Diketopyrrolopyrrole-boron complexes are promising candidates to overcome this limitation as they feature extremely high photoluminescence quantum yield in the near-infrared region and high chemical stability. Here, by incorporating suitably functionalized diketopyrrolopyrrole derivatives emitting at ∼760 nm in an active matrix of poly(9,9-dioctylfluorene-alt-benzothiadiazole) and without using complex light out-coupling or encapsulation strategies, we obtain all-solution-processed NIR-OLEDs with external quantum efficiency as high as 0.5%. Importantly, our test-bed devices show no efficiency roll-off even for high current densities and high operational stability, retaining over 50% of the initial radiant emittance for over 50 hours of continuous operation at 10 mA/cm 2, which emphasizes the great applicative potential of the proposed strategy

Sassi, M., Buccheri, N., Rooney, M., Botta, C., Bruni, F., Giovanella, U., et al. (2016). Near-infrared roll-off-free electroluminescence from highly stable diketopyrrolopyrrole light emitting diodes. SCIENTIFIC REPORTS, 6 [10.1038/srep34096].

Near-infrared roll-off-free electroluminescence from highly stable diketopyrrolopyrrole light emitting diodes

SASSI, MAURO
Primo
;
BUCCHERI, NUNZIO FRANCESCO
Secondo
;
BRUNI, FRANCESCO;BROVELLI, SERGIO
Penultimo
;
BEVERINA, LUCA
Ultimo
2016

Abstract

Organic light emitting diodes (OLEDs) operating in the near-infrared spectral region are gaining growing relevance for emerging photonic technologies, such as lab-on-chip platforms for medical diagnostics, flexible self-medicated pads for photodynamic therapy, night vision and plastic-based telecommunications. The achievement of efficient near-infrared electroluminescence from solution-processed OLEDs is, however, an open challenge due to the low photoluminescence efficiency of most narrow-energy-gap organic emitters. Diketopyrrolopyrrole-boron complexes are promising candidates to overcome this limitation as they feature extremely high photoluminescence quantum yield in the near-infrared region and high chemical stability. Here, by incorporating suitably functionalized diketopyrrolopyrrole derivatives emitting at ∼760 nm in an active matrix of poly(9,9-dioctylfluorene-alt-benzothiadiazole) and without using complex light out-coupling or encapsulation strategies, we obtain all-solution-processed NIR-OLEDs with external quantum efficiency as high as 0.5%. Importantly, our test-bed devices show no efficiency roll-off even for high current densities and high operational stability, retaining over 50% of the initial radiant emittance for over 50 hours of continuous operation at 10 mA/cm 2, which emphasizes the great applicative potential of the proposed strategy
Articolo in rivista - Articolo scientifico
LED
English
Sassi, M., Buccheri, N., Rooney, M., Botta, C., Bruni, F., Giovanella, U., et al. (2016). Near-infrared roll-off-free electroluminescence from highly stable diketopyrrolopyrrole light emitting diodes. SCIENTIFIC REPORTS, 6 [10.1038/srep34096].
Sassi, M; Buccheri, N; Rooney, M; Botta, C; Bruni, F; Giovanella, U; Brovelli, S; Beverina, L
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/132948
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