[16a-M_124-1~12] 12.5 Organic and hybrid solar cells

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

[16a-M_124-7] Highly-Emissive Organic Photovoltaics by Suppressing Non-radiative Recombination

Qing-Jun Shui¹, Naoya Aizawa^2,3, Jinyao Xu², Atsuko Nihonyanagi⁴, Daigo Miyajima^4,5, Ken-ichi Nakayama², Yutaka Majima¹, 〇Seiichiro Izawa¹ (1.Science Tokyo MSL, 2.Univ. Osaka, 3.Hokkaido Univ., 4.RIKEN CEMS, 5.Chinese Univ. Hong Kong)

Keywords:

Organic solar cell,Light-emitting diode,Multiple resonance thermally activated delayed fluorescence molecule

To suppress nonradiative recombination losses, which are key to reducing voltage losses in organic solar cells, we fabricated organic solar cells using multiple resonance thermally activated delayed fluorescence molecules. We successfully suppressed energy transfer to triplet excitons and thermal-vibrational relaxation from charge-transfer states, which are a cause of non-radiative recombination. This resulted in both the power conversion efficiency of the solar cell and the external quantum efficiency of electroluminescence of the same device exceeding 1%. We successfully constructed a device capable of self-luminescence powered by the energy generated under sunlight irradiation.