Current-Density Dependence of Transient Properties in Green Phosphorescent Organic Light-Emitting Diodes
スポンサーリンク
概要
- 論文の詳細を見る
The current-density dependence of the transient characteristics of a green phosphorescent organic light-emitting diode (OLED) with tris(2-phenylpyridine)iridium(III) [Ir(ppy)3] as the emissive layer and the quenching process, which contributes to roll-off in a device, were investigated. A maximum quantum efficiency of 11% and luminance of 45,000 cd/m2 were achieved for a green OLED. The behaviors of the transient characteristics and efficiency are analyzed using the triplet--triplet annihilation model. The device exhibited a gradual decrease in quantum current efficiency owing to the triplet--triplet annihilation at a high current density. At a higher current density, the reduced rise and decay times are due to high-density triplet excitons related to the enhanced triplet--triplet annihilation and the increase of the nonradiative process. The cut-off frequency of the device is mainly limited by the phosphorescent recombination lifetime.
- 2011-04-25
論文 | ランダム
- 簡易同定キットOXI/FERMTubeとENTEROTUBEの併用による尿路感染菌同定の試み(新しいキットの紹介)
- Dip slide法による尿中細菌簡易測定キット"Urotube"Roche(新しいキットの紹介)
- 蛍光X線分析法を用いたチタン表面におけるリン酸カルシウム析出量の評価
- 生体表層系を利用した生化学的活性物質の探索系--スクリ-ニング・プロ-ブとしての細菌運動性
- ローカル学会2題(学会見聞記)