Abstract:
A technique for depositing plasmon silver nanoparticles into various functional layers of an organic solar cell
has been developed. Analysis of the structure of nanoparticles was carried out according to electron microscopic
images on an electron microscope MIRA 3 LMU, Tescan. Electron microscopic analysis showed the
presence of spherical silver nanoparticles. The size of silver nanoparticles was ~ 100–200 nm. The frequency
of plasmon resonance lies in the region of 451-457 nm. The microstructural and optical properties of
nanocomposite materials obtained are studied. The film thickness of the deposited photoactive layer P3HT:
PCBM is 229 nm, the thickness of the deposited silver film is 87 nm, respectively. It is shown that the absorption
band of silver nanoparticles on the ITO surface has a maximum at the wavelength of 457 nm. For silver
nanoparticles on the P3HT / PCBM surface, the maximum wavelength is shifted to the shortwave region at
451 nm. The photovoltaic and electrotransport properties of film polymer compositions based on P3NT:
RSVM and silver nanoparticles are studied.Measurement of the volt-ampere characteristic of the cells was
carried out by illuminating the cell from the side of the conducting layer of the ITO. It is shown that the deposition
of silver nanoparticles on the ITO surface increases the PSC efficiency by 1.7 times. When the film of
silver nanoparticles is positioned between PEDOT / PSS and the photoactive layer of P3HT / PCBM, the efficiency
is reduced by approximately 1.8 times. In the presence of silver nanoparticles, a further reduction in
the cell efficiency is observed on the surface of the P3HT / PCBM photoactive layer. Doping of silver nanoparticles
into the photoactive layer of P3HT / PCBM also leads to a decrease in the cell efficiency. The electron
transport properties of a solar cell with a bulk heterojunction were studied using the method of electrochemical
impedance spectroscopy (EIS). It is shown that a significant increase in the cell efficiency is observed
when silver nanoparticles are deposited on the ITO surface. Precipitation of silver nanoparticles on the
surface of the PEDOT:PSS layer and doping them into the P3HT: PCBM volume reduces the conversion of
solar energy into electrical energy.
