Abstract
In the present work, thin films of ruthenium based metal-organic frameworks are synthesized using a layer-by-layer (LbL) technique and the film is characterized using XRD, FE-SEM, UV/visible spectroscopy, cyclic voltammetry and photoluminance spectroscopy. Further, the feasibility of the MOF film as a sensitizer in a solar cell is investigated. The HOMO-LUMO level of the frameworks is estimated and is found to be suitable to allow the use of the frameworks as a sensitizer for TiO2. When TiO2 mesoporous film is sensitized with the LBL thin film of the frameworks and a Grätzel type liquid junction solar cell is constructed, it demonstrates the cell performance of Isc = 2.56 mA cm-2, Voc = 0.63 V, FF = 0.63, and Eff = 1.22%. Photoluminescence spectroscopy and electrochemical impedance spectroscopy show that iodine doping into the frameworks is essential to facilitate the photogenerated electron transfer from the frameworks to TiO2.
Original language | English |
---|---|
Pages (from-to) | 12037-12042 |
Number of pages | 6 |
Journal | RSC Advances |
Volume | 4 |
Issue number | 23 |
DOIs | |
State | Published - 2014 |