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】
【賞状】
