A quasi-solid-state gel-electrolyte containing mesoporous silica nanoparticles (MSNs) capable of light-scattering is applied to plastic-based dye-sensitized solar cells (DSSCs). The MSNs based gel-electrolyte exhibits higher reflectance in the visible wavelength and contains nanometer-sized pores to facilitate the I-/I3- ion diffusion and increase the ionic conductivity of the gel-electrolyte. Linear sweep voltammetry (LSV) measurements and electrochemical impedance spectra (EIS) are used to substantiate the explanations. Optimization on both the wt% of MSNs and the I2 concentration (i.e., 10 wt% of MSNs and 0.02 M of I2) of the gel-electrolyte give the best cell performance with a light-to-electricity conversion efficiency (η) of 5.45% under illumination of 100 mW cm-2. A mechanism for enhanced efficiency is proposed regarding the role of MSNs.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering