By Pankaj Kumar
This publication includes certain details at the kinds, constitution, fabrication, and characterization of natural sunlight cells (OSCs). It discusses techniques to enhance efficiencies and the prevention of decay in OSCs. It compares the cost-effectiveness of OSCs to these in keeping with crystalline silicon and discusses how one can make OSCs less expensive. This publication offers a realistic advisor for the fabrication, processing, and characterization of OSCs and paves the way for additional improvement in OSC technology.
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Additional resources for Organic solar cells: device physics, processing, degradation, and prevention
The most efficient devices have remained unchanged from the original concept of DSSCs. It took almost two decades for DSSCs to go beyond 11% PCE and there remains the issue of instability. Attempts have been made to replace the liquid electrolyte medium with some suitable solid-state medium and the solar cells were named solid-state dye-sensitized solar cells (SSDSSCs). Though the SSDSSCs have shown better stability, the efficiencies are low. More important, the concept of SSDSSCs recently gave birth to a new emerging solar cell technology known as perovskite solar cell technology.
15 Schematic representation of some of the organic–inorganic hybrid solar cells with different inorganic semiconducting nanostructures like (a) nanoparticles, (b) nanorods or nanotubes, and (c) nanorod or nanotube arrays. (d) Schematic representation of working principle of a typical organic–inorganic hybrid solar cell. quite similar to those of OSCs except the electron acceptors in hybrid solar cells are crystalline nanostructures of inorganic semiconductors. The excitons generated in the polymers on light absorption get dissociated at the polymer–inorganic nanocrystal interfaces where electrons get transferred to inorganic nanocrystals and the holes remain in the polymer.
3) The percentage efficiency of a solar cell is calculated from η= I scVoc FF × 100. 4) If P(λ) is the spectral power density of the incident light, then the incident optical power (Pin) can be calculated from ∞ ∫ Pin = P(λ ) dλ. 6) Please note that the efficiency of a solar cell depends on its temperature and the intensity of incident light. It will vary with variation in testing conditions. Therefore while quoting the cell performance, the testing condition should always be mentioned. 35 Solar Cells and Their Generations Due to different device architectures and material properties of different types of solar cells, it is not necessary for the physics to be same for all types of devices.