2017年第64回応用物理学会春季学術講演会

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12 有機分子・バイオエレクトロニクス » 12.4 有機EL・トランジスタ

[15a-302-1~10] 12.4 有機EL・トランジスタ

2017年3月15日(水) 09:00 〜 11:45 302 (302)

松島 敏則(九大)、酒井 正俊(千葉大)

09:45 〜 10:00

[15a-302-4] Centrifugal Coated Quasi-2D CsPb2Br5 Emitter Layer for Perovskite Light-Emitting Diodes and Lasing

Qin Chuanjiang1,2、Matsushima Toshinori1,2、Sandanayaka Atura. S. D1,2、Adachi Chihaya1,2 (1.OPERA Kyushu Univ.、2.JST ERATO)

キーワード:perovskite, light-emitting diode, lasing

Low-cost and room-temperature solution-processed inorganic two dimensional perovskites with strong exciton binding energy, chemistry stability, and color-tunable photoluminescence are promising for light-emitting diodes (LEDs) and laser application. However, efficient pure inorganic quasi-2D perovskite based PeLEDs have not been realized yet. Here centrifugal-coated quasi-2D CsPb2Br5 films from nanocrystal colloidal are successfully developed. This technique allows for the formation of very thin continuous layers of high-quality quasi-2D CsPb2Br5 which is challenging for traditional spin-coating methods. Through thickness control process and without additional treatment, we obtained a compact and uniform CsPb2Br5 emitter layer with a photoluminescence quantum yield of 35% and demonstrated perovskite LEDs with good external quantum efficiency of 2.6%. We in-situ studied the carrier traps of complete CsPb2Br5 based LEDs and observed two types of traps using thermally stimulated current technique. Further, a random lasing from centrifugal-coated quasi-2D CsPb2Br5 film was also demonstrated with a promising low threshold.