Significant improvement of device durability in organic light-emitting diodes by doping both hole transport and emitter layers with rubrene molecules | Zendy

Gosuke Sakamoto | Zendy; Chihaya Adachi | Zendy; Toshiki Koyama | Zendy; Yoshio Taniguchi | Zendy; Charles D. Merritt | Zendy; Hideyuki Murata | Zendy; Zakya H. Kafafi | Zendy

Open Access

Significant improvement of device durability in organic light-emitting diodes by doping both hole transport and emitter layers with rubrene molecules

Author(s) -

Gosuke Sakamoto,

Chihaya Adachi,

Toshiki Koyama,

Yoshio Taniguchi,

Charles D. Merritt,

Hideyuki Murata,

Zakya H. Kafafi

Publication year - 1999

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.124506

Subject(s) - rubrene , oled , common emitter , doping , materials science , optoelectronics , dopant , anode , cathode , diode , layer (electronics) , electroluminescence , light emitting diode , electrode , nanotechnology , chemistry

We have developed highly durable organic light-emitting diodes. The basic structure of the diodes is anode/hole injection layer/hole transport layer+dopant/emitter layer+dopant/cathode. Both the hole transport and the emitter layers were doped with the highly fluorescent rubrene molecules. With the doping of both layers, 85% of the initial luminance was successively maintained even after 1000 h of continuous operation under constant current driving. Doping of only one of these layers, either the hole transport layer or emitter layer, on the other hand, resulted in shorter lifetime. We mention the possible mechanisms of the doping that enhance the device duration.

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