[13a-1G-1~10] 12.4 Organic light-emitting devices and organic transistors

△ [13a-1G-1] Optical amplification utilizing triplet excitons

〇Taro Furukawa^1,2, Hajime Nakanotani^1,2,3, Chihaya Adachi^1,2,3 (1.Kyushu Univ., 2.OPERA, 3.JST-ERATO)

Keywords:organic electronics,organic semiconductor laser

Toward the realization of the organic semiconductor laser by the electrical excitation, we propose a new emission mechanism. In our system, the triplets are converted to singlets by reverse intersystem crossing in a “TADF molecule”, and then the singlets are resonantly transferred to the singlet state of the laser dye. Since this approach permits the constructive use of triplets, the threshold current density for lasing may be significantly reduced.