Infrared-to-visible upconversion (UC) bears the potential to increase the efficiency of single junction solar cells, surpassing the Shockley Queisser limit by sub-bandgap photon sensitization. Recently, triplet sensitization of rubrene by free charge carrier injection from bulk perovskites has shown promise in solid-state photon UC. To implement UC into a solar cell, a device architecture where the UC device is mounted under the cell would be required. In this configuration, the upconverting film would be exposed to the transmitted light as well as the increased temperatures that are seen in functional solar cells. Temperatures in excess of 65° C have been observed within solar cells and have been shown to decrease the power conversion efficiencies due to thermal losses. For a solid-state UC device to be successfully implemented into a solar cell, it will need to operate at elevated temperatures and under irradiation from the sun. Here we present the current findings of solid-state UC in perovskite/rubrene bilayer films under operating conditions.

Investigating bulk perovskite sensitized photon upconversion under operating conditions

ACS Spring 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.