News [2018]

(Nikkei xTech) An article related to a joint R&D achievement between Kido/Sasabe Lab and Professor Su (South China University of Technology) was released.

2018/04/03

An article related to a joint R&D achievement between Kido/Sasabe Lab and Professor Su (South China University of Technology) was released on web magazine, Nikkei xTECH.

Title: Horizontally Orientated Sticklike Emitters: Enhancement of Intrinsic Out-Coupling Factor and Electroluminescence Performance
By M. Liu, R. Komatsu, X. Cai, K. Hotta, S. Sato, K. Liu, D. Chen, Y. Kato, H. Sasabe*, S. Ohisa, Y. Suzuri, D. Yokoyama, S.-J. Su*, J. Kido,* Chem. Mater.2017, 29, 8630–8636.

Abstract: Highly efficient organic light-emitting diodes are in urgent demand in applications of new generation full-color displays and solid-state lighting sources. The limitation of device performance is greatly affected by extrinsic and intrinsic elements of the light out-coupling process. By elaborately designing emitters as sticklike molecules, horizontal orientation ratios in the range of 86–93% were realized to intrinsically increase the out-coupling factor of electroluminescence devices. These elongated compounds are inclined to lie parallel to substrate in vacuum-deposited thin solid films and regularize their transition dipole moments in a major degree. As consequences of such desirable molecule arrangement, remarkable external quantum efficiencies near 21% for pure blue devices, close to 30% for sky-blue devices, and over 35% for greenish blue devices were respectively achieved. A compatible strategy on devising high-performance emitters for organic electroluminescence is advocated herein.

• Kido/Sasabe HP　>>　

　　http://oled.yz.yamagata-u.ac.jp/view.cgi?p=315

• Web Magazine Nikkei xTECH　>>

　　http://tech.nikkeibp.co.jp/atcl/nxt/column/18/00022/00010/?ST=nxt_thmdm_device?n_cid=nbpnxt_fbbn

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