Enhanced Performance of CdS/CdSe Quantum Dot Cosensitized Solar Cells via Homogeneous Distribution of Quantum Dots in TiO2 Film
Citations Over TimeTop 10% of 2012 papers
Abstract
The thickness and porosity of TiO2 mesoporous film were optimized for better distribution of quantum dots to enhance the performance of CdS/CdSe quantum dot cosensitized solar cells. The CdS and CdSe quantum dots were prepared on TiO2 mesoporous film through a successive ion layer absorption and reaction (SILAR) method and a chemical bath deposition (CBD) method, respectively. It was found that the distribution of quantum dots was inhomogeneous from the surface to the interior of the TiO2 film, being mainly concentrated at the upper layer of the TiO2 film. As a result, simply increasing film thickness did not make significant contribution to improving solar cell efficiency since only a small portion of quantum dots might access the interior of the film, leading to an exposure of TiO2 nanoparticles in electrolyte and thus reducing the electron lifetime due to increased charge recombination rate. Our study revealed that the efficiency could reach its maximum, ∼4.62%, with the TiO2 film, the thickness of which was around 11 μm, and porosity was optimized by adding 12 wt % ethyl cellulose into the paste for making the TiO2 film.
Related Papers
- → Catalytic Application of Mesoporous ZSM-5 Zeolite(2014)19 cited
- → Synthesis of mesoporous ceria without template(2013)17 cited
- → Imaging and Manipulating Energy Transfer Among Quantum Dots at Individual Dot Resolution(2017)20 cited
- CHANGES OF POROSITY VALUE IN ABNORMALLY HIGH PRESSURE GAS RESERVOIRS AND ITS EFFECTS ON THE PRECISION OF RESERVE CALCULATION——A CASE STUDY ON JIA-2 GAS RESERVOIR,MOXI GASFIELD(2007)
- Synthesis,Characterization and Catalytic Properties of Mesoporous Materials with Loading of TS-1 Precursors(2004)