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Monolithic bifacial perovskite-CdSeTe tandem thin film solar cells for harvesting light from the environment

Project #D2021-04Invention DescriptionThe University of Toledo has developed a new tandem solar cell design — the bifacial tandem (Fig. 1) that enabled the first realization of a working monolithic tandem solar cell comprising wide-bandgap metal halide perovskite and narrow-bandgap cadmium selenide telluride (CdSeTe, or CST). The bifacial strategy...

PERC-like contact for CdTe Solar Cells

Project ID: D2019-40BackgroundCdCl2 activation is a well-known method to passivate grain boundaries for CdTe solar cells. In crystalline silicon solar cells, manufacturers have started to modify film structures to incorporate a passivated layer. These are called Passivated Emitter and Rear Cells (PERC). The additional layer decreases the recombination...

Inexpensive, Earth-Abundant, and Tunable Hole Transport Material for CdTe Solar Cells

Project ID: D2017-08Background Photovoltaic (PV) cells have been produced with a wide variety of materials for each functional layer. The typical PV is a substrate layer coated with a semiconductor layer and two ohmic contacts. Thin film solar cells use a thin absorbing layer, such as Cadmium telluride (CdTe). CdTe is the most eco-friendly, high efficiency,...

A Bi-level Equalizer for Battery Cell Charge Management

Project ID: D2016-41 Background: Lithium ion batteries for electric vehicles (EV) begin to degrade much faster after the capacity drops below about 80%, and manufacturers recommend that they be replaced at about this point. However, these batteries still have adequate capacity for other applications, and it is expected that vast numbers will soon...