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Scientists in the Netherlands have built a perovskite solar cell with a planarizing layer of polyamide-imide (PAI) serving as an insulating layer. The device has an open circuit voltage of 1.11 V, a short circuit current of 19.9 mA cm-2, and a fill factor of 0.75.
Scientists in the Netherlands have fabricated an inverted perovskite solar cell based on a polymer-coated steel substrate that can achieve energy conversion efficiency approaching that of non-inverted reference solar cells with a design similar stack.
The cell has a pin structure and is based on nickel-plated steel covered with a planarization layer of polyamide-imide (PAI), which serves as an insulating layer. The researchers used an opaque titanium electrode covered with a thin layer of powdered indium tin oxide (ITO) to allow binding of the phosphonic acid anchoring groups of the perovskite-based monolayer known as 2PACz, which serves as the electrode. hole collector.
For the manufacture of the ETL they also used buckminsterfullerene, a molecule that is also known as C60. In addition, they added a buffer layer of tin(IV) oxide (SnO2), via atomic layer deposition (ALD), to prevent damage to the underlying cell during sputter deposition of the transparent ITO top electrode.
Solar cell performance was compared under standard lighting conditions with that of two reference devices built on a glass substrate and a glass superstructure, respectively. The latter showed a power conversion efficiency of 19.1%, an open circuit voltage of 1.13 V, a short circuit current of 20.8 mA cm-2 and a fill factor of 0.81.
The cell on the steel substrate achieved an efficiency of 16.5%, an open circuit voltage of 1.11 V, a short circuit current of 19.9 mA cm-2 and a fill factor of 0.75. The glass substrate based device had an efficiency of 15.8%, an open circuit voltage of 1.11 V, a short circuit current of 19.8 mA cm-2 and a fill factor of 0.72.
"This demonstrates that substrate-configured cells made on the Ni-coated steel substrate can achieve performance levels similar to those made on glass," the scientists said. “Strategies to further increase the PCE of cells with substrate configuration can therefore focus on reducing optical losses in the ETL, enhancing bottom electrode reflection, and using a less transparent top contact. resistive”.
They presented their findings in " Pin Perovskite Solar Cells on Steel Substrates, " which was recently published in ACS Publications. The group consists of researchers from Eindhoven University of Technology, the Netherlands Organization for Applied Scientific Research (TNO) and Indian steelmaker Tata Steel. |
