学生のLE, Cong Duyさん（博士後期課程3年、応用物理学領域、村田研究室）が12th Asian Conference on Organic Electronics (A-COE 2020)においてBest Poster Presentation Awardsを受賞しました。

　Asian Conference on Organic Electronics（A-COE）は、OLEDs、OPVs、DSCs、 ペロブスカイトエレクトロニクス、OFETs、OLETs、有機メモリ、センサ、新しい有機エレクトロニクス等に関する最先端研究の分野において、主にアジアとアジア太平洋地域の研究者に討論の場を提供しています。
　今回、A-COE 2020は、11月8日から10日にかけて、オンライン併用で開催されました。

■受賞年月日
　令和2年11月10日

■研究題目、論文タイトル等
Extended Lifetime of Fluorescent Organic Light Emitting Diodes by Combining Ultra-Clean Fabrication Conditions and Annealing after Device Fabrication

■研究者、著者
Duy Cong Le and Hideyuki Murata

■受賞対象となった研究の内容
We have previously demonstrated that stability of organic light emitting diodes (OLEDs) is governed by the amount of residual water in an evaporation chamber. To further remove the residual water, two non-evaporable getter pumps (NEGP) were added to the evaporation chamber pumped with tandem turbo molecular pumps (TMP). The lifetime at which luminance reaches to 90% of the initial luminance (LT₉₀=136 h) of devices fabricated with NEGP (OLED-NEGP) showed significant improvement (more than 5 times) than that (25 h) without NEGP (OLED-TMP). We further improve the device LT₉₀ by annealing the device after fabrication. The LT₉₀ (236 h) of the annealed OLED-NEGP showed 9.4 times longer lifetime than that of OLED-TMP. From detailed analysis of photoluminescence lifetime and morphological measurement, the improvement in the stability of annealed OLED-NEG is ascribed to the increase in the density of the hole transport layer.

■受賞にあたって一言
I am honored to receive the award for the best poster presentation of 12th A-COE conference. I acknowledge my supervisor, Prof. Hideyuki Murata for his guidance. I acknowledge members in Murata laboratory for their assistance. I also acknowledge my wife, Linh for consistently inspiring me during my graduate study. Finally, I am indebted to my parents for their reliable supports.

令和2年12月4日