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

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[16a-M_124-6] Impact of electron injection layer on charge accumulation characteristics of organic photovoltaics

〇Sohta Kasamatsu¹, Yuki Miyazawa¹, Yutaka Noguchi^1,2 (1.SST Meiji Univ., 2.GSST Meiji Univ.)

Keywords:

Organic Solar Cells

Interfacial charge accumulation in organic thin-film solar cells (OPVs) promotes non-radiative deactivation via SRH recombination and exciton-polaron quenching (EPQ), leading to reduced fill factor (FF) and open-circuit voltage (Voc). Suppressing these energy loss mechanisms is essential for further improving OPV performance. We have previously proposed the Displacement Current Measurement (DCM) method and simultaneous DCM-PL measurements, demonstrating their utility in evaluating EPQ characteristics primarily attributed to charge accumulation in organic light-emitting diodes. At the 2025 Fall Meeting of the Japan Society of Applied Physics, we reported on the application of the DCM-PL method to an OPV using P3HT:PCBM, focusing on the correlation between charge accumulation characteristics and FF, as well as the observation of EPQ. In this study, we report that the insertion of an electron injection layer significantly alters the charge accumulation characteristics of the OPV.