Tuneable Singlet Exciton Fission and Triplet-Triplet Annihilation in an Orthogonal Pentacene Dimer
Steven Lukman,Andrew J. Musser,Kai Chen,Stavros Athanasopoulos,Chaw K. Yong,Zebing Zeng,Qun Ye,Chunyan Chi,Justin M. Hodgkiss,Jishan Wu,Richard H. Friend,Neil C. Greenham +11 more
Reads0
Chats0
TLDR
In this article, fast and highly efficient intramolecular singlet exciton fission in a pentacene dimer, consisting of two covalently attached, nearly orthogonal units, was reported.Abstract:
Fast and highly efficient intramolecular singlet exciton fission in a pentacene dimer, consisting of two covalently attached, nearly orthogonal pentacene units is reported. Fission to triplet excitons from this ground state geometry occurs within 1 ps in isolated molecules in solution and dispersed solid matrices. The process exhibits a sensitivity to environmental polarity and competes with geometric relaxation in the singlet state, while subsequent triplet decay is strongly dependent on conformational freedom. The near orthogonal arrangement of the pentacene units is unlike any structure currently proposed for efficient singlet exciton fission and may lead to new molecular design rules.read more
Citations
More filters
Journal ArticleDOI
Theoretical Modeling of Singlet Fission
TL;DR: A review of the most recent advances with respect to the theoretical and computational studies on the singlet fission phenomenon revisits important aspects regarding electronic states involved in the process, the evaluation of fission rates and interstate couplings, and the advances in the design and characterization of single fission compounds and materials.
Journal ArticleDOI
Harnessing singlet exciton fission to break the Shockley–Queisser limit
Akshay Rao,Richard H. Friend +1 more
TL;DR: Singlet exciton fission is a carrier multiplication process in organic semiconductors that generates two electron-hole pairs for each photon absorbed as discussed by the authors, which can be used to enhance the efficiency of conventional inorganic solar cells and break the Shockley-Queisser limit of single-junction photovoltaics.
Journal ArticleDOI
Enabling singlet fission by controlling intramolecular charge transfer in π -stacked covalent terrylenediimide dimers
Eric A. Margulies,Claire E. Miller,Yilei Wu,Lin Ma,George C. Schatz,Ryan M. Young,Michael R. Wasielewski +6 more
TL;DR: A series of covalently bound π-stacked terrylenediimide dimers have been studied to elucidate the role of interchromophore charge-transfer states in the mechanism of singlet fission, and show that adjusting the charge- transfer-state energy relative to those of the exciton states can serve to either inhibit or promote singletfission.
Journal ArticleDOI
Quintet multiexciton dynamics in singlet fission
Murad J. Y. Tayebjee,Samuel N. Sanders,Elango Kumarasamy,Luis M. Campos,Matthew Y. Sfeir,Dane R. McCamey +5 more
TL;DR: In this paper, the authors used bridged pentacene dimers, which undergo intramolecular singlet fission while isolated in solution and in solid matrices, as a unimolecular model system that can trap long-lived multiexciton states.
Journal ArticleDOI
Observation of Two Triplet-Pair Intermediates in Singlet Exciton Fission
Ryan D. Pensack,Evgeny E. Ostroumov,Andrew J. Tilley,Samuel M. Mazza,Christopher Grieco,Karl J. Thorley,John B. Asbury,Dwight S. Seferos,John E. Anthony,Gregory D. Scholes +9 more
TL;DR: This work proposes a three-step model of singlet fission that includes two triplet-pair intermediates and shows how transient spectroscopy can distinguish initially interacting triplet pairs from those that are spatially separated and noninteracting.
References
More filters
Book
Principles of fluorescence spectroscopy
TL;DR: This book describes the fundamental aspects of fluorescence, the biochemical applications of this methodology, and the instrumentation used in fluorescence spectroscopy.
Journal ArticleDOI
Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
TL;DR: In this article, an upper theoretical limit for the efficiency of p−n junction solar energy converters, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination mechanism of holeelectron pairs is radiative as required by the principle of detailed balance.
BookDOI
Molecular fluorescence : principles and applications
TL;DR: In this article, the effects of intermolecular photophysical processes on fluorescence emission are discussed and an analysis of the effect of polarity of fluorescence emissions is presented.
Journal ArticleDOI
Structural Changes Accompanying Intramolecular Electron Transfer: Focus on Twisted Intramolecular Charge-Transfer States and Structures
TL;DR: The Rehybridization of the Acceptor (RICT) and Planarization ofThe Molecule (PICT) III is presented, with a comparison of the effects on yield and radiationless deactivation processes.
Journal ArticleDOI
Recent Advances in Singlet Fission
Millicent B. Smith,Josef Michl +1 more
TL;DR: The current state of the development of molecular structure design rules, based on first-principles theoretical considerations, is described along with initial examples of implementation.
Related Papers (5)
Solar conversion efficiency of photovoltaic and photoelectrolysis cells with carrier multiplication absorbers
Mark C. Hanna,Arthur J. Nozik +1 more