Founded by:

Romanian National Authority for Scientific Research, CNC - UEFISCDI

Contract number:

109/5/10/2011, project PN-II-ID-PCE-2011-3-0535

Project manager:

Anca - Luiza IONESCU, alexe@physics.pub.ro

Project leader:

University "Politehnica" of Bucharest

Project duration:

oct. 2011 - Oct. 2015

 

 

Laboratory:

Soft Condensed Matter Laboratory

Abstract:

Even since 1991 dye sensitized solar cells (DSSC) have opened a way for harvesting solar radiation with devices much cheaper than those using silicon. Yet, DSSC have a smaller efficiency and researchers worldwide strive to improve it. Our project is associated to this general goal. In particular, we plan to deal with several aspects of a functional DSSC. One of the objectives is building the mesoporous conducting electrode by using lyotropic liquid crystals with hexagonal packing as template for electron conducting titania. Another aim is to try dyes with a better anchoring (if possible with covalent bonds) to the adsorbent titania ordered photoanode. Both objectives would increase the electron transfer from excited dye to TiO2, and a faster conduction of electrons toward the anodic contact, reducing recombination losses. Another way of improving DSSC efficiency is to use, as electrolyte, ionic liquid crystals, taking into account that their ordered structure increases the hole conduction. In order to accomplish these objectives we shall construct a reusable cell (not to waste precious substances), perform electric, optic, and electrochemical measurements (voltammetry, impedance spectroscopy in dark and light conditions, photometry, etc.). Experimental results will be interpreted in terms of new proposed theoretical models. These models will have a feedback effect by suggesting new experimental procedures. The director of the project and her team has a good expertise in the field as the number and value of published papers and patents acknowledge.