Perovskite is a mineral with excellent abilities to absorb sunlight and convert it into electricity.
This recipe makes perovskites ideal for use in the manufacture of solar panels, as they need components with precisely these properties to fulfill their purpose: producing power.
A new inverted perovskite solar cell
A group of scientists has developed an inverted perovskite solar cell capable of providing an efficiency of 24.1%.
The cell in question has an active area of 9.6 mm2, and maintains 96% initial energy conversion efficiency even after continuous tracking of the maximum power point for 1000 hours.
The structural structure of this solar cell allows perovskite to be deposited on the hole transport layer and then covered with an electron transport layer. One of the strengths of inverted perovskite solar cells is usually stability.
How was this result obtained?
According to the researchers, the dipoles on the perovskite surface are able to suppress ionic bonding, while facilitating interfacial charge extraction and increasing Water polo.
The type of dipole the researchers used is known as b-pV2F, and it allowed them to create a much more compact perovskite film, with a larger grain size of about 480 mm.
In the words of the researchers: “Atomic force microscopy images showed that b-pV2F reduced the surface roughness from 54.4 to 41.1 nm, which improves coverage with charge transport layers.”
The team involved made measurements during the entire film formation process, using wide-angle X-ray scattering, and thus discovered that b-pV2F controls perovskite crystallization by reducing the perovskite energy. , which leads to the formation of a more organized crystal structure.
The achieved power conversion efficiency was 24.1%, and this is under normal lighting conditions, an open circuit of 1.18 V, a short-circuit current of 24.8 mA/cm2, and a fill factor of 84.3%.
This result was confirmed and approved by the Shanghai Institute of Microsystems and Information Technology.
“The stability of the unencapsulated devices under working conditions shows that perovskite solar cells retain 96% of the initial energy conversion efficiency after continuous tracking of the maximum power point for 1000 hours”And The scientists said.
Quantum innovation advances to low cost solar technology – inverted perovskite
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