[17a-M_B104-1~11] 12.3 Functional Materials and Novel Devices

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[17a-M_B104-7] Organic semiconductor lasers are promising for various applications, but under CW excitation and electrical excitation, optical loss caused by the accumulation of triplet excitons. The main cause is excitons loss due to singlet-triplet annihilation and triplet absorption. In this study, we designed a molecule exhibiting both ASE and TTU properties to suppress triplets’ accumulation.

〇(M2)Aoi Haraguchi¹, Goushi Kenichi², Adachi Chihaya^1,3 (1.OPERA, Kyushu Univ., 2.Kyushu Univ., 3.I2CNER, Kyushu Univ.)

Keywords:

Organic semiconductor laser,Triplet-triplet annihilation upconversion,Amplified spontaneous emission

Organic semiconductor lasers are anticipated for applications due to their wavelength tunability and low cost. However, in continuous-wave (CW) excitation and electrical excitation, optical loss caused by the accumulation of triplet excitons inhibits oscillation. The primary cause is excitons loss due to singlet-triplet annihilation and triplet absorption by the accumulated triplet excitons. In this study, we designed a novel molecule exhibiting both ASE characteristics and intramolecular triplet-triplet upconversion (TTU) properties, aiming to suppress accumulation by reusing triplet excitons.