Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 50, Pages 18376-18385Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b10762
Keywords
-
Categories
Funding
- Engineering and Physical Sciences Research Council, U.K [EP/M005143/1, EP/G060738/1, EP/M025330/1]
- A*STAR Singapore
- MOE Tier 3 grant [MOE2014-T3-1-004]
- Engineering and Physical Sciences Research Council [EP/M005143/1, EP/G060738/1, EP/M025330/1] Funding Source: researchfish
- EPSRC [EP/M025330/1, EP/G060738/1, EP/M005143/1] Funding Source: UKRI
Ask authors/readers for more resources
Singlet fission offers the potential to overcome thermodynamic limits in solar cells by converting the energy of a single absorbed photon into two distinct triplet excitons. However, progress is limited by the small family of suitable materials, and new chromophore design principles are needed. Here, we experimentally vindicate the design concept of diradical stabilization in a tunable family of functionalized zethrenes. All molecules in the series exhibit rapid formation of a bound, spin-entangled triplet-pair state TT. It can be dissociated by thermally activated triplet hopping and exhibits surprisingly strong emission for an optically dark state, further enhanced with increasing diradical character. We find that the TT excited-state absorption spectral shape correlates with the binding energy between constituent triplets, providing a new tool to understand this unusual state. Our results reveal a versatile new family of tunable materials with excellent optical and photochemical properties for exploitation in singlet fission devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available