[7p-S201-1~19] 12.5 Organic and hybrid solar cells

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[7p-S201-4] Grating-coupled Surface Plasmon Resonance Enhancement in Organic Thin-film Solar Cells

〇(M2)Thanapol Khamhla^1,2, Kanet Wongravee², Sachiko Jonai¹, Kazunari Shinbo¹, Sanong Ekgasit², Akira Baba¹ (1.Niigata Univ., 2.Chulalongkorn Univ.)

Keywords:

Grating-coupled surface plasmon resonance,Organic Solar Cells,Absorption Enhancement

Light-trapping strategies are essential for organic solar cells (OSCs) due to their thin active layers, which limit light absorption. Plasmonic enhancement, particularly grating-coupled surface plasmon resonance (GCSPR), has shown promise in improving absorption by enhancing electromagnetic fields near the metal-dielectric interface. This study investigates the effect of a grating metal back reflector on absorption in inverted OSCs. The reflectivity ratio under p- and s-polarised light shows reduced reflectivity at 647 nm, indicating efficient coupling of incident light. Results from experiments, FDTD simulations, and GCSPR theory align well. However, only light overlapping with the active layer’s absorption spectrum contributes to enhancement, highlighting the need to optimise grating period. Electric field simulations confirm enhanced, polarisation-dependent fields at the interface, correlating with increased absorption.