Singlet fission efficiency in tetracene-based organic solar cells

Journal Article · Mon May 12 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4876600· OSTI ID:22273433

Thompson, Nicholas J.; Congreve, Daniel N.; Hontz, Eric; Yost, Shane R.; Van Voorhis, Troy

Singlet exciton fission splits one singlet exciton into two triplet excitons. Using a joint analysis of photocurrent and fluorescence modulation under a magnetic field, we determine that the triplet yield within optimized tetracene organic photovoltaic devices is 153% ± 5% for a tetracene film thickness of 20 nm. The corresponding internal quantum efficiency is 127% ± 18%. These results are used to prove the effectiveness of a simplified triplet yield measurement that relies only on the magnetic field modulation of fluorescence. Despite its relatively slow rate of singlet fission, the measured triplet yields confirm that tetracene is presently the best candidate for use with silicon solar cells.

• OSTI ID: 22273433
• Journal Information: Applied Physics Letters, Vol. 104, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EXCITONS
FLUORESCENCE
MAGNETIC FIELDS
ORGANIC SOLAR CELLS
PHOTOVOLTAIC EFFECT
QUANTUM EFFICIENCY
SILICON SOLAR CELLS
TETRACENE