Details

Autor(en) / Beteiligte

• Mo, Hin-Wai
• Tsuchiya, Youichi
• Geng, Yan
• Sagawa, Takehiro
• Kikuchi, Chika
• Nakanotani, Hajime
• Ito, Fuyuki
• Adachi, Chihaya

Titel

Color Tuning of Avobenzone Boron Difluoride as an Emitter to Achieve Full-Color Emission

Ist Teil von

• Advanced functional materials, 2016-10, Vol.26 (37), p.6703-6710

Ort / Verlag

Blackwell Publishing Ltd

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Wiley Blackwell Single Titles

Beschreibungen/Notizen

• Organic light‐emitting diodes (OLEDs) displaying a wide range of emission colors with emission peaks from 450 to 665 nm using a single emitting material, avobenzone boron difluoride (AVB‐BF2), are reported. Color tuning is achieved by controlling the aggregation of AVB‐BF2 and the formation of a “triadic” exciplex of an AVB‐BF2 dimer and a host molecule. Various electroluminescent devices containing AVB‐BF2 cover the whole visible light spectrum and a white‐emitting device with CIE coordinates of (0.35, 0.37) is obtained with a single emitting material in a single emissive layer. Furthermore, an exceptionally high external quantum efficiency of nearly 13% is achieved for a green‐emitting OLED because AVB‐BF2 exhibits thermally activated delayed fluorescence by forming the exciplex. Full‐color‐tunable OLEDs that can also achieve white emission are demonstrated by using a single emitter and a single emissive layer through a new strategy exploiting both aggregation and exciplex formation. The aggregation formation induces emission color shift from blue to green. Further color shift to red is provided by the aggregation induced exciplex formation through the triadic exciplex formation between aggregated emitter and host molecules.