Consequently, electron is injected into the photoanode to generate photocurrent, the hole is transported to the counter through redox couple toward electrode (Cathode).
Upon the illumination of light, the QDs generate the exciton (electron-hole pairs). The configuration of QDSSC consists of Photoanode (TiO 2, ZnO, ZrO 2, SnO 2, etc., nanoparticle thin films), quantum dots (PbS, PbSe, CdS, CdSe, etc.), electrolyte (polysulfide, cobalt complex, etc.), and counter electrode (MoO 3, CuS, CuSe, Pt, carbon black, etc.). In recent year, the concept of utilizing nanomaterial-based architectures in light energy conversion devices has emerged as an alternative to single-crystalline-based photovoltaic devices.īesides the silicon solar cells, quantum dots sensitized solar cell (44%) and dye sensitized solar cells (33%) are two promising alternatives due to their cost-effective concepts for solar to electric energy conversion. The solar cell converts sunlight directly into electricity. As the major renewable energy source, i.e., solar energy has the potential to become an essential component of future global energy production. This forces mankind to look for new, more sustainable long-term energy solutions to provide the future energy resource. However, the inherent problems associated with the use of fossil fuel are their limited availability and the environmental issues. The large existing need of the global energy is accomplished by burning fossil fuels.
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