skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Femtosecond stimulated Raman spectroscopy – guided library mining leads to efficient singlet fission in rubrene derivatives

Journal Article · · Chemical Science
DOI:https://doi.org/10.1039/D1SC04251C· OSTI ID:1823662

Chromophores undergoing singlet fission are promising candidates for harnessing solar energy as they can generate a pair of charge carriers by the absorption of one photon. However, photovoltaic devices employing singlet fission are still lacking practical applications due to the limitations within the existing molecules undergoing singlet fission. Chemical modifications to acenes can lead to efficient singlet fission devices, but the influence of changes to molecular structure on the rate of singlet fission is challenging to model and predict. Using femtosecond stimulated Raman spectroscopy we have previously demonstrated that the triplet separation process during singlet fission in crystalline rubrene is associated with the loss of electron density from its tetracene core. Based on this knowledge, we mined a library of new rubrene derivatives with electron withdrawing substituents that prime the molecules for efficient singlet fission, without impacting their crystal packing. Our rationally chosen crystalline chromophores exhibit significantly improved singlet fission rates. This study demonstrates the utility and strength of a structurally sensitive spectroscopic technique in providing insights to spectroscopy-guided materials selection and design guidelines that go beyond energy arguments to design new singlet fission-capable chromophores.

Research Organization:
Univ. of Minnesota, Twin Cities, MN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0018203
OSTI ID:
1823662
Alternate ID(s):
OSTI ID: 1856824
Journal Information:
Chemical Science, Journal Name: Chemical Science Vol. 12 Journal Issue: 41; ISSN 2041-6520
Publisher:
Royal Society of Chemistry (RSC)Copyright Statement
Country of Publication:
United Kingdom
Language:
English

References (62)

Solar conversion efficiency of photovoltaic and photoelectrolysis cells with carrier multiplication absorbers journal October 2006
Femtosecond Raman Microscopy Reveals Structural Dynamics Leading to Triplet Separation in Rubrene Singlet Fission journal November 2017
Femtosecond broadband stimulated Raman spectroscopy: Apparatus and methods journal November 2004
Synthesis and Crystal Engineering of Rubrene and Its Derivatives journal October 2020
Real-time observation of multiexcitonic states in ultrafast singlet fission using coherent 2D electronic spectroscopy journal October 2015
Recent Advances in Singlet Fission journal April 2013
Ultrafast Nonadiabatic Dynamics of Singlet Fission: Quantum Dynamics with the Multilayer Multiconfigurational Time-Dependent Hartree (ML-MCTDH) Method journal January 2016
A Simple Kinetic Model for Singlet Fission: A Role of Electronic and Entropic Contributions to Macroscopic Rates journal February 2014
Sensitization of silicon by singlet exciton fission in tetracene journal July 2019
Peak External Photocurrent Quantum Efficiency Exceeding 100% via MEG in a Quantum Dot Solar Cell journal December 2011
Singlet Fission in Rubrene Derivatives: Impact of Molecular Packing journal March 2017
Rubrene/Fullerene Heterostructures with a Half-Gap Electroluminescence Threshold and Large Photovoltage journal November 2007
Femtosecond Stimulated Raman Spectroscopy journal March 2016
Singlet Fission and Triplet Exciton Dynamics in Rubrene/Fullerene Heterojunctions: Implications for Electroluminescence journal October 2015
Femtosecond Stimulated Raman Spectroscopy journal May 2007
Emerging Design Principles for Enhanced Solar Energy Utilization with Singlet Fission journal January 2019
Observation of long-range exciton diffusion in highly ordered organic semiconductors journal October 2010
Communication: Comment on the effective temporal and spectral resolution of impulsive stimulated Raman signals journal April 2011
Thermally activated singlet exciton fission observed in rubrene doped organic films journal February 2014
Harnessing Molecular Vibrations to Probe Triplet Dynamics During Singlet Fission journal November 2017
Charge Transfer–Mediated Singlet Fission journal April 2015
Singlet fission in rubrene single crystal: direct observation by femtosecond pump–probe spectroscopy journal January 2012
Long-Lived Triplet Excited States of Bent-Shaped Pentacene Dimers by Intramolecular Singlet Fission journal March 2016
Molecular design for efficient singlet fission journal March 2018
Correlated Pair States Formed by Singlet Fission and Exciton–Exciton Annihilation journal December 2015
Observing the Multiexciton State in Singlet Fission and Ensuing Ultrafast Multielectron Transfer journal December 2011
Molecular Design Strategies for Efficient Intramolecular Singlet Exciton Fission journal November 2018
Field Effect Studies on Rubrene and Impurities of Rubrene journal January 2006
Fluorescence from rubrene single crystals: Interplay of singlet fission and energy trapping journal May 2013
Direct observation of ultrafast long-range charge separation at polymer–fullerene heterojunctions journal July 2014
Singlet Fission in Crystalline Organic Materials: Recent Insights and Future Directions journal October 2019
Understanding the Bound Triplet-Pair State in Singlet Fission journal August 2019
Advances in Singlet Fission Chromophore Design Enabled by Vibrational Spectroscopies journal October 2020
Anion Photoelectron Spectroscopy of Rubrene: Molecular Insights into Singlet Fission Energetics journal September 2017
Facile Background Discrimination in Femtosecond Stimulated Raman Spectroscopy Using a Dual-Frequency Raman Pump Technique journal August 2019
Re-Evaluation of Rhodopsin’s Relaxation Kinetics Determined from Femtosecond Stimulated Raman Lineshapes journal June 2011
Rubrenes: Planar and Twisted journal October 2008
Orientation and Polarization Dependence of Ground- and Excited-State FSRS in Crystalline Betaine-30 journal May 2019
Singlet Fission journal November 2010
Two-photon-induced singlet fission in rubrene single crystal journal May 2013
Partial Fluorination as a Strategy for Crystal Engineering of Rubrene Derivatives journal January 2017
External Quantum Efficiency Above 100% in a Singlet-Exciton-Fission-Based Organic Photovoltaic Cell journal April 2013
Regioselective synthesis of substituted rubrenes journal June 1990
Dynamics of the triplet-pair state reveals the likely coexistence of coherent and incoherent singlet fission in crystalline hexacene journal December 2016
Triplet Pair States in Singlet Fission journal January 2019
Perfluorinated and Half-Fluorinated Rubrenes: Synthesis and Crystal Packing Arrangements journal July 2017
Coherent singlet fission activated by symmetry breaking journal May 2017
The Rubrenic Synthesis: The Delicate Equilibrium between Tetracene and Cyclobutene journal May 2011
Rubrene-Based Single-Crystal Organic Semiconductors: Synthesis, Electronic Structure, and Charge-Transport Properties journal May 2013
Structural Observation of the Primary Isomerization in Vision with Femtosecond-Stimulated Raman journal November 2005
Probing Interfacial Electron Transfer in Coumarin 343 Sensitized TiO 2 Nanoparticles with Femtosecond Stimulated Raman journal November 2009
Connecting Molecular Structure and Exciton Diffusion Length in Rubrene Derivatives journal June 2013
Mapping GFP structure evolution during proton transfer with femtosecond Raman spectroscopy journal November 2009
Recent Highlights and Perspectives on Acene Based Molecules and Materials journal July 2014
Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells journal March 1961
Triplet Separation Drives Singlet Fission after Femtosecond Correlated Triplet Pair Production in Rubrene journal August 2017
Femtosecond Stimulated Raman Spectroscopy journal September 2006
Singlet Fission: From Coherences to Kinetics journal June 2014
The entangled triplet pair state in acene and heteroacene materials journal July 2017
Ultrafast Raman Spectroscopy as a Probe of Local Structure and Dynamics in Photoexcited Conjugated Materials journal September 2016
Evidence for conical intersection dynamics mediating ultrafast singlet exciton fission journal March 2015
Competition between polaron pair formation and singlet fission observed in amorphous rubrene films journal June 2013

Similar Records

Femtosecond stimulated Raman evidence for charge-transfer character in pentacene singlet fission
Journal Article · Mon Jan 01 00:00:00 EST 2018 · Chemical Science · OSTI ID:1823662

Advances in Singlet Fission Chromophore Design Enabled by Vibrational Spectroscopies
Journal Article · Tue Oct 27 00:00:00 EDT 2020 · Journal of Physical Chemistry. C · OSTI ID:1823662

Measuring Intermolecular Excited State Geometry for Favorable Singlet Fission in Tetracene
Journal Article · Thu Jan 25 00:00:00 EST 2024 · Journal of Physical Chemistry Letters · OSTI ID:1823662