Samuel Parthenia Sanders

US Patent:

20180258217, Sep 13, 2018

Filed:

Dec 17, 2015

Appl. No.:

15/536964

Inventors:

- New York NY, US
- Upton NY, US
Samuel Nathan Sanders - New York NY, US
Elango Kumarasamy - New York NY, US
Andrew Brian Pun - New York NY, US
Michael Louis Steigerwald - Martinsville NJ, US

International Classification:

C08G 61/10

Abstract:

The present invention provides soluble, stable singlet fission (SF) compounds, compositions, materials, methods of their use, and methods for their preparation that provide efficient intramolecular singlet fission (iSF) and multiple excitons. The SF compound may be a dimer, an oligomer, or a polymer of polyoligoacenes, where for example, the compound achieves a triplet yield reaching about 200% per absorbed photon. In this system, SF does not depend on intermolecular inter-actions. Instead, SF is an intrinsic property of the molecule and therefore occurs independent of intermolecular interactions. Singlet fission has the potential to significantly improve the photocurrent in single junction solar cells and thus raise the Shockley-Queisser power conversion efficiency limit from about 33% to about 46% or greater. Quantitative SF yield at room temperature has only been observed in crystalline solids or aggregates of higher acenes.