PEROVSKITE SOLAR CELLS WITH FLATTENED GRAIN-BOUNDARY GROOVES AND METHOD FOR MANUFACTURING THE SAME
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United States of America Patent
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Issued Date -
May 16, 2024
app pub date -
Jun 29, 2023
filing date -
Nov 15, 2022
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Abstract
A perovskite solar cell includes an electron-transport layer (ETL), a perovskite layer, and an HTL. The ETL is with an additive phase buried therein and disposed over a substrate with a bottom electrode. The perovskite layer is disposed above the ETL and is in contact with the ETL. The perovskite layer includes a plurality of grains which arranged on a top surface of the ETL along a direction, in which two of the adjacent grains have adjacent side surfaces to form a void there between over the top surface of the ETL. The top of the void defines a GBG side-angle with the direction, in which a mean GBG side-angle of the perovskite layer is in a range from 5 degrees to 30 degrees. A HTL is disposed over the perovskite layer and between a top electrode and the perovskite layer.
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