講演情報
[15p-K405-5]Plasmonic Enhancement from Gold Nanoparticles and Grating Structure in Organic Solar Cell: Simulation Study
〇(M2)Thanapol Khamhla1,2, Kanet Wongravee2, Sachiko Jonai1, Kazunari Shinbo1, Sanong Ekgasit2, Akira Baba1 (1.Niigata Univ., 2.Chulalongkorn Univ.)
キーワード：
Organic Solar Cell、Finite-Difference Time-Domain、Gold nanoparticles
This work applies Finite-Difference Time-Domain (FDTD) simulations to systematically examine the optical properties of an organic solar cell (OSC) in the presence of gold nanoparticles (AuNPs) and two-dimensional square grating structures. AuNPs and grating structures were introduced into the hole transport layer (PEDOT:PSS) and the metal back reflector of Glass/ITO/PEDOT:PSS/P3HT:PCBM/Al structure, respectively. Enhanced electric fields from the localized surface plasmon resonance (LSPR) effect of AuNPs and improved light trapping effects from the grating structure were utilised to enhance light absorption in the active layer. Absorbed photon flux (APF) was used to quantify light absorption efficiency. The size and density of AuNPs were optimised. Without the grating structure, the optimal AuNPs size was determined to be 90 nm, and the optimal density is approximately 1x109 particles/cm². The enhancement observed with larger AuNPs was primarily attributed to forward scattering, which increased the light path length within the active layer. This effect is visualised by the electric field enhancement map (|EAuNPs|2/|Eplain|2). When a grating structure was introduced into the metal back reflector, additional enhancement was observed due to the light-trapping effect, occurring in the same wavelength range as the AuNPs. The grating structure further improved the APF across all AuNP densities compared to the plain structure with AuNPs.