Microwave Assisted Synthesis of Zno and Tio2 Photo-Electrode for Dye Sensitized Solar Cell

Description

Download Microwave Assisted Synthesis of Zno and Tio2 Photo-Electrode for Dye Sensitized Solar Cell. Physics and Astronomy students who are writing their projects can get this material to aid their research work.

Abstract

Dye sensitized solar cells (DSSCs) have been under extensive research. Since the color of the device can be easily varied by choosing different dyes and cells on flexible substrates, DSSCs are especially attractive for Building Integrated Photovoltaics (BIPV).

The cell concept is believed to reduce the production costs and energy payback time to a large extent compared to standard silicon cells or other thin film cells. Dye sensitizer absorbs the incident sunlight and exploits the light energy to induce vectorial electron transfer reaction.

DSSCs differ from conventional semiconductor devices in that they separate the function of light absorption from charge carrier transport. Thus DSSCs have the following advantages compared with the silicon based photovoltaics. (1) It is not sensitive to the defects in semiconductors such as defects in Si.

(2) The semiconductor-electrolyte interface (SEI) is easy to form and also it is cost effective for production. (3) It is possible to realize the direct energy transfer from photons to chemical energy.

Nanocrystalline dyed sensitized solar cells are photoelectrochemical cells based on principles similar to the processes in natural photosynthesis. Both use organic dye to absorb the incoming light and produce excited electrons.

Introduction

The increase in demand for fossil fuels and the environmental impact of their use are exerting pressure on an already-stretched world energy infrastructure. Some significant progress has been made in the development of renewable-energy technologies such as solar cells, fuel cells, and biofuels.

However, these alternative energy sources have been marginalized in the past. It is expected that new technology could make them more practical and price competitive with fossil fuels, thus enabling an eventual transition away from fossil fuels as our primary energy source.

Solar energy is considered to be the fundamental solution to the energy and environmental challenge as a carbon-free energy source [1].

Solar energy is the energy derived from the sun. It can be harnessed in two major ways; as thermal energy using photo-thermal and as electrical energy using photovoltaic (PV) effect.

Solar cell is a device that converts solar energy directly to electricity by the photovoltaic effect. Many photovoltaic devices have already been developed over the past five decades [1].

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