A Dye-Sensitized Solar Cell (DSSC) was introduced by O'Regan and Grätzel in 1991 (Nature 1991, 353, 737-740). Since then the research on the field of DSSCs has bloomed in order to find more efficient and more stable components. The highest certified conversion efficiency of the DSSC has recently reached 12.2% (September 2011), but the long-term stability of the DSSC is still to be confirmed. Nevertheless, the DSSCs are recognized as an alternative photovoltaic technology to conventional silicon solar cells especially due to their potentially inexpensive manufacturing based on printing technology. In recent years the first production lines have been launched, which significantly foster these technologies towards their industrialization.
In our laboratory the activities in the field of DSSC started in 2004. A deep understanding of fundamental operation of the DSSC together with the development of new paste for the preparation of sponge like TiO2 layers enabled us manufacturing of high efficient cells. Their conversion efficiencies up to 10.2% for acetonitrile and 7.3% for ionic liquid based electrolyte were measured under standard test conditions (100mW/cm2, AM 1.5, 25°C). The development has been world-wide recognized and presented on the web page of Elsevier - Energylocate as a selected news on the field of renewable energy sources. Recently, we have employed the electroluminescence measurements together with the optical microscopy inspection to evaluate initial performance and to follow the stability of the DSSCs.
Our main activities are:
- design, development and fabrication of DSSCs cells and modules
- development and preparation of nanocrystalline TiO2 pastes and layers
- testing and optimization of the electrolyte
- testing of dyes
- characterization of the DSSCs cells and modules
- stability studies (indoor and outdoor)
- development of advanced DSSC systems (smart window and solar cell, solar cell and battery)
- electroluminescent measurements