Investigation of Gold Quantum Dots-Gold Nanoparticles Enhanced Organic Thin-Film Solar Cells

摘要

Gold nanoparticles (AuNPs) have been introduced into the organic thin-film solar cells for increasing photo-carriers because they can absorb the light in a broad wavelength region from visible to near infrared regions. Due to the excitation of local ized surface plasmon resonance (LSPR) and light scattering known, strong electric field can be obtained in the organic solar cells with AuNPs. When the size of gold nanoparticles further becomes sma ler (< 2 nm), they are called gold clusters or gold quantum dots. As they have a diameter of less than 2 nm, they exhibit a quantum size effect; this effect means that the size of the AuQDs determines the wavelength of the fluorescence emission.. This implies that AuQDs can harvest light from the UV region and convert it into visible light. Because most organic photoelectric-converting materials harvest light mostly in the visible range, one important challenge is to apply AuQDs especially for organic light-harvesting systems. Here, we report enhanced properties of plasmonic organic thin-film solar cells by incorporating AuQDs and AuNPs.