L R AS Published on Monday 15 February 2021 - n° 350 - Categories:perovskite
In short, perovskite: coloured perovskite; high-yield tin perovskite
In short, perovskite: coloured perovskite; high-yield tin perovskite
Scientists in Singapore have produced opaque but also coloured perovskite solar cells for urban applications. To do this, they used two approaches:
Inthe first one, to obtain colours, they modified the inner layers of the perovskite cell, such as the absorber, the electron transport layer (ETL), the hole transport layer (HTL) or the electrodes.
The second method uses external techniques: a°) the use of dielectric mirrors or coloured coatings to make coloured perovskite solar cells, although light absorption and efficiency are limited; b°) the deposition of a coloured coating on the surface of the perovskite cells; c°) the application of a coloured coating on the surface of the perovskite solar cells, which can be applied to the surface of the cells.rovskite cells; c°) applying coating pigments by centrifugation on the thin semi-transparent silver electrode of a semi-transparent perovskite cell; d°) applying a coloured coating to the surface of the perovskite cells.rovskite cell; d°) the use of narrow band reflective filters (NBRF) on the front of the indium tin oxide (ITO)/glass layer. "The main limitation of this approach is the variation in light absorption due to the additional coating".
https://www.pv-magazine.com/2021/02/08/effective-approaches-to-build-colored-perovskite-solar-cells/
PV Magazine of 8 February
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Until now, tin-based perovskite cells (with an efficiency of 10%) have had difficulty in matching the efficiency of lead-based cells, which reach 25%. Even though lead is in small quantities in these cells, and therefore has little effect on the environment, scientists have been looking for alternatives.
The Maulana Azad National Institute of Technology in Bhopal, India, found that tin-based perovskites have great potential, provided the right combination of other cell materials is found and their use optimised. By eliminating defects, they achieved 28.4% on a 1 cm² cell.
https://www.pv-magazine.com/2021/02/11/modeling-the-potential-of-lead-free-perovskites/
PV Magazine of 11 February 2021
