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  • 【受賞】ドレスデン工科大に留学中の D3 小松龍太郎君が XXIInd International Krutyn Summer School 2017 でベストポスター賞!
2017年05月31日
【受賞】ドレスデン工科大に留学中の D3 小松龍太郎君が XXIInd International Krutyn Summer School 2017 でベストポスター賞!

ドレスデン工科大学に留学中の D3 小松龍太郎君(Ryutaro Komatsu)がポーランドで行われた XXIInd International Krutyn Summer School 2017 に参加し、「Novel Molecular Design Strategy for Deep-Blue Thermally Activated Delayed Fluorescent Emitters」のタイトルでポスター発表を行い、ベストポスター賞を受賞しました。龍太郎、おめでとう!

 

Novel Molecular Design Strategy for Deep-Blue Thermally Activated Delayed Fluorescent Emitters

By R. Komatsu, T. Ohsawa, H. Sasabe, K. Nakao, Y. Hayasaka, J. Kido

Summer School: XXIInd International Krutyn Summer School 2017, Krutyn, Masurian Lake District, Poland, May 21-27, 2017, "State of the Art Organic-only TADF OLEDs. From Theory to Applications” 

 

Abstract

The development of efficient deep-blue emitters is one of the key issues in organic light-emitting devices (OLEDs). As a promising technology that realizes 100% conversion from electrons to photons, thermally activated delayed fluorescence (TADF) emitters have attracted considerable attention [1–3]. However, only a few efficient deep-blue TADF emitters have been reported to date. Here, to realize deep-blue emission, we molecularly manipulated the electronic excited state energies of pyrimidine-based TADF emitters [4–5]. We then systematically investigate the relationships among the chemical structure and optical properties. The resultant novel pyrimidine emitters called Ac-XMHPMs (X = 1, 2, and 3) contain different numbers of bulky methyl substituents at acceptor moieties, increasing the excited singlet and triplet state energies. Among them, Ac-3MHPM, with a high triplet state energy of 2.95 eV exhibits a high peak external quantum efficiency (EQE) of 18% and an EQE of 10% at 100 cd/m2 with Commission Internationale de l'Eclairage chromaticity coordinates of (0.16, 0.15). These efficiencies are among the highest values to date for deep-blue TADF-OLEDs [6].

 

【Durham 大学の Monkmann 教授と小松君】

 

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