Related Experiment Video
Updated: Jun 14, 2026
09:51
Atom Probe Tomography Studies on the CuIn,GaSe2 Grain Boundaries
Published on: April 22, 2013
12.8K
Singlet fission in TIPS-anthracene thin films
Damon M de Clercq1, Miles I Collins2, Nicholas P Sloane2
1School of Chemistry, ARC Centre of Excellence in Exciton Science, UNSW Sydney NSW 2052 Australia timothy.schmidt@unsw.edu.au.
Chemical Science
|May 3, 2024
Summary
Singlet fission, an exciton multiplication process, was observed in TIPS-anthracene organic semiconductors. Despite a 19% singlet fission yield, low triplet yields suggest rapid decay pathways limit efficiency.
Area of Science:
- Organic electronics
- Photophysics
- Materials science
Background:
- Singlet fission converts one singlet exciton into two triplet excitons.
- Acenes and TIPS-substituted derivatives are key organic semiconductors for studying singlet fission.
- TIPS-anthracene has shown potential for high singlet fission yields but lacks experimental investigation.
Purpose of the Study:
- Investigate singlet fission in TIPS-anthracene.
- Determine singlet fission yield and understand factors limiting triplet yield.
- Explore the photophysical properties of TIPS-anthracene films.
Main Methods:
- Spin-cast film preparation of TIPS-anthracene.
- Time-resolved spectroscopic measurements.
- Magneto-photoluminescence spectroscopy and kinetic modeling.
Main Results:
- Experimental evidence for singlet fission in TIPS-anthracene films.
- Estimated singlet fission yield of 19% via transient absorption spectroscopy.
- Kinetic modeling indicates fast triplet dissociation and non-radiative decay limit triplet yield.
Conclusions:
- TIPS-anthracene exhibits singlet fission, but efficiency is hampered by rapid decay processes.
- Non-radiative decay of S1 and 1(TT) states significantly reduces triplet exciton formation.
- Further research needed to optimize TIPS-anthracene for efficient singlet fission applications.
Related Concept Videos
01:20Binary Fission
Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
01:13¹H NMR: Complex Splitting
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
01:17Spin–Spin Coupling: One-Bond Coupling
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...