ニュース《2024年》

【論文受理】城戸・笹部・千葉研究室M2 花山貴則君と佐野健志教授、城戸淳二教授らのリン光アシストドーパントを用いた高効率・長寿命近赤外有機ELの論文が Applied Physics Express (APEX) (IF: 2.3) に受理されました。

2024/03/19

城戸・笹部・千葉研究室M2 花山貴則君と佐野健志教授、城戸淳二教授らのリン光アシストドーパントを用いた高効率・長寿命近赤外有機ELの論文が Applied Physics Express (APEX) (IF: 2.3) に受理！

本研究は、JST の SCICORP プロジェクト（JST SICORP Grant Number JPMJSC2007）の助成を受けたものです。

Title: Near-infrared phosphorescent OLEDs exhibiting over 10% external quantum efficiency and extremely long lifetime using resonant energy transfer with a phosphorescent assist dopant By Takanori Hanayama, Takeshi Sano*, Yu Saito, Takeru Nakamura, Yutaka Okuyama, Hisahiro Sasabe*, and Junji Kido*, Appl. Phys. Exp. 2024, accepted. Abstract: We have introduced a three-component light-emitting layer consisting of a host, a phosphorescent assist dopant, and a phosphorescent emitter to simultaneously realize high efficiency and long lifetime in near-infrared organic light-emitting diodes. An efficient energy transfer between the two phosphorescent materials was observed with 1 wt% doping ratio of the near-infrared emitter, significantly enhancing the external quantum efficiency reaching 10.5% with an emission peak at 769 nm. The device showed a low drive voltage and a long operational lifetime, with a luminance decay of less than 11% from the initial value after 4800 hours under accelerated conditions of 100 mA/cm2.

城戸・笹部・千葉研究室Webサイト: https://oled.yz.yamagata-u.ac.jp/view.cgi?p=437

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