Improved Performance of Organic Light-Emitting Device with Anatase TiO2 Anode

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概要

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• An organic light-emitting device (OLED) with a Nb-doped anatase TiO2 thin film on a LaAlO3 substrate as an anode shows higher performance than OLEDs with a rutile TiO2 anode. The OLED structure is TiO2/poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)/N,N$'$-di-[(1-naphthalenyl)-N,N$'$-diphenyl]-(1,1$'$-biphenyl)-4,4$'$-diamine ($\alpha$-NPD)/tris(8-hydroxyquinoline) aluminum (Alq3)/LiF/Al. The maximum luminance is about 3200 cd/m2 at 20 V, and the current efficiency is approximately 2–3 cd/A, which is comparable to that of a reference OLED with an Sn-doped In2O3 (ITO) anode. We speculate that the improvement of the OLED performance comes from the low resistivity with a relatively low electron density of anatase TiO2.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2008-02-25

著者

• Ueno Kazunori

  Institute For Materials Research Tohoku University

• Nakano Masaki

  Institute For Materials Research Tohoku University

• Toyosaki Hidemi

  Institute For Materials Research Tohoku University

• Kawasaki Masashi

  Institute For Chemical Research Kyoto University

• FUKUMURA Tomoteru

  Institute for Materials Research

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