| Fabrication and investigation of nanostructured dye-sensitized solar cells using ZnO and TiO2 nanoparticle |
| Paper ID : 1035-UFGNSM-FULL |
| Authors: |
|
Mozhagn Hosseinnezhad *1, Kamaladin Gharanjig2 1Department of Organic Colorants, Institute for Color Science and Technology, P.O. Box 16656118481, Tehran, Iran. 2Department of Organic Colorants, Institute for Color Science and Technology, Tehran, Iran |
| Abstract: |
| Dye-sensitized solar cells (DSSCs) are current topic of research in the field of renewable energy resources. TiO2 nanocrystalline material has been utilised as photoelectrode in DSSCs. Other n type metal oxide semiconductors, such as ZnO, SnO2 can be utilized in DSSCs due to studies of photoelectrochemically active thin semiconductor films. ZnO is the well known metal oxide to replace TiO2 due to similar band gap and its higher electronic mobility as TiO2. In this study, ZnO and TiO2 photoanode were studied to investigate the characteristic and power conversion efficiency (PCE) properties of DSSCs. Then, we investigated influence of use of anti-aggregation agent on the performance of DSSCs based on ZnO. A nanocrystalline TiO2 or ZnO film was coated on a transparent glass support. Each individual dye was adsorbed by dipping a separate coated glass in a 5×10−5M ethanolic solution ofnorganic dye in the absence and presence of anti-aggregation agent for 12 hours. The synthesized photoelectrode, Pt counter electrode and electrolyte was separately assembled into a sealed sandwich type solar cell. For each solar cell, an action spectrum was measured under monochromatic light with a constant photon number (5×1015 photons cm−2s−1). J–V characteristics were measured under illumination with AM 1•5 simulated sun using a Bunko-Keiki CEP-2000 system. The photocurrent density (Jsc, mAcm-2), photovoltage (Voc, V), fill factor (FF) and PCE (η, %) for ZnO and TiO2 nanoparticle are 13.6 mAcm-2, 0.75 V, 0.49, 5.1% and 15.70 mAcm-2, 0.7 V, 0.54 and 6.6%, respectively. The electron transfer process is reduced due to aggregation of molecular dyes, and anti-aggregation agent was used in preparation of DSSCs. The PCE of ZnO and TiO2 in the presence of anti-aggregation agent are 5.71% and 7.04%, respectively. The results showed that the conversion efficiencies were improved with the reduction of aggregation in the presences of anti-aggregation agents. |
| Keywords: |
| Dye-sensitized solar cells, ZnO, TiO2, nano particle, PCE |
| Status : Paper Accepted (Poster Presentation) |
