Enhanced optical absorption of organic materials via surface plasmon resonance in gold nanoparticles
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Journal Volume
6656
Date Issued
2007
Author(s)
Abstract
In this paper, we described an engineered enhancement of optical absorption in an organic photovoltaic cell via the excitation of surface plasmon resonance (SPR) in spherical Au nanoparticles deposited on a photovoltaic device. We deposited 5-nm diameter gold nanoparticles on ITO (indium tin oxide) glass substrates and then coated poly (styrenesulfonate) / poly (2,3-dihydro-thieno-1, 4-dioxin) (PEDOT) which can reduce the work function of metal atoms and poly (2-methoxy-5-(2-ethylhexyloxy)-1, 4-phenylenevinylene} (MEHPPV) with Fullerene(C60) mixtures that work as p-type and n-type organic semiconductors, respectively. By using Mie theory simulation, we could predict SPR resonance peak of gold nanoparticles and we assumed the enhancement in electromagnetic field absorption within a device results in increased photocurrent response in organic p-n junction diodes with gold nanoparticles. Compared with the same organic photovoltaic structures without gold nanoparticles, the proposed device shows about 40 % power efficiency improvement under halogen illumination. Experimental results agree well with simulation prediction, which showed SPR can be applied to enhance optical absorption of organic materials.
Subjects
Mie theory; Organic photovoltaic cell; Particle plasmon; Spectrum response; Surface plasmon
SDGs
Other Subjects
Computer simulation; Diodes; Electromagnetic field effects; Glass; Gold; Light absorption; Surface plasmon resonance; Mie theory; Organic photovoltaic cells; Particle plasmon; Spectrum response; Nanoparticles
Type
conference paper