Postdoc, University of Mississippi


Newly developed method allows to achieve photo-voltage by DSCs which was not possible before

Global energy demand is steady increasing. Sustainable fossil fuel-free pathways to electricity and fuel production such as conversion of water to H2 and CO2 to carbons fuels with only O2 as a by-product are highly desirable. Solar energy is the most abundant energy source, however; energy conversion and storage needs to increase in efficiency for practical applications. Dye-sensitized solar cells (DSCs) are promising in terms of cost, stability, commercial viability and environmental impact when compared with many solar cell technologies. Additionally, DSCs are an exceptionally attractive solar cell technology for converting high potential energy photons efficiently with the highest single DSC cell giving a Voc value of 1.4 V. Traditionally, research efforts for DSCs have targeted achieving high efficiency single-junction devices by balancing photocurrent and Voc. However, single cell devices convert all absorbed photons regardless of potential energy to the same voltage resulting in significant energetic waste from high-energy solar spectrum photons. Series tandem DSCs (ST-DSCs) combined with low energy photon utilizing solar cells such as GaAs or silicon offer device architectures to circumvent this potential energy loss. We developed a unique methodology to achieve high enough photo-voltage by single illuminated area DSCs which has the potential to power electrocatalysts for producing H2 fuel from water, CO from CO2 and consumer electronics such as smartphones and Li-Ion batteries which require approx.3.7-4.0 V to charge.