Semantic Scholar extracted view of "Increasing the electrical efficiency and thermal management of a photovoltaic module using expanded graphite (EG)/paraffin-beef tallow-coconut oil
Although PV panels are widely used to generate electricity from solar energy, their most important defect is the reduction of electrical efficiency with the increase of their temperature. The aims
Graphite Materials for the Production of Mono- or Multicrystalline Solar Wafers. Silicon based photovoltaics relies on either mono- or multi-crystalline silicon crystal growth. Silicon wafers are the foundation of all Si solar cells.
We propose a solar cell design using the combination of titanium dioxide (TiO 2) and graphite as active photon absorbing materials. TiO 2 absorbs photons of nearly ultraviolet wavelengths to produce electron–hole pairs, while
What is a solar panel?Solar panel electricity systems, also known as solar photovoltaics (PV), capture the sun’s energy (photons) and convert it into electricity. PV cells are made from layers of semiconducting material, and
For the production of multicrystalline and monocrystalline silicon, the most important raw material in the production of solar cells in the photovoltaic industry, we are developing essential components based on specialty graphite for the highly sensitive process of crystal growth.
However, to our knowledge, the use of graphite as a photon-absorbing material in a solar cell has not been investigated. Graphite is a semimetal with a valence and conduction band that overlap by around 0.03 eV [19, 20]. The structure of the solar cell reported here is schematically shown in Fig. 1.
Graphite is a semimetal with a valence and conduction band that overlap by around 0.03 eV [19, 20]. The structure of the solar cell reported here is schematically shown in Fig. 1. The solar cell is composed of fluorine-doped tin oxide (FTO) as a transparent electrode, photon-absorbing particles, a polymer electrolyte and a counter electrode.
Kim et al. added a low-band-gap material to a main absorbing material to improve the efficiency of a plastic-based solar cell . Peet et al. developed a tandem solar cell by combining the functions of low- and high-band-gap materials to widen the absorption range and observed improved efficiency .
While graphite purity as high as 99.9% is achieved using this process, the need for temperatures as high as ~3000 °C 5, and uncertainties associated with the generation of volatile constituents and their associated environmental impacts challenge the environmental sustainability of this process.
We demonstrated that a design of solar cells having a TiO 2 /graphite mixture as an active (absorber) material can reach an efficiency of approximately 1.09 %, much higher than solar cells using TiO 2 only (0.03 %) or graphite only (0.12 %) as the active material.
