March 28 (Renewables Now) - The US Patent and Trademark Office (USPTO) has awarded a patent to Solar-Tectic LLC for a tin perovskite/crystalline silicon thin film tandem solar cell, the company said Monday.
Invented by CEO Ashok Chaudhari, the tandem solar photovoltaic (PV) cell combines a top perovskite layer with a thickness of less than 1 micron, and a thin film crystalline silicon (CSiTF) bottom layer which can be as this as 20-30 microns.
The process relies on tin (Sn) to deposit the CSiTF material for the bottom layer in the tandem configuration as well as in the top, perovskite, layer. No lead (PB) is used in the perovskite here.
Solar-Tectic says it used conventional processing methods similar to those in today's thin-film solar cell industry. It added that research and development of the perovskite thin-film tandem technology has begun at Blue Wave Semiconductors Inc in Maryland.