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

Title: Singlet Fission in Thin Solid Films of Bis(thienyl)diketopyrrolopyrroles

Journal Article · · ChemPlusChem
ORCiD logo [1];  [1];  [1];  [2];  [2];  [1];  [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [4];  [4];  [5];  [6]
  1. Inst. of Macromolecular Chemistry Czech Academy of Sciences (Czech Republic)
  2. Inst. of Macromolecular Chemistry Czech Academy of Sciences (Czech Republic); Charles Univ. (Czech Republic)
  3. Brno Univ. of Technology (Czech Republic)
  4. Inst. of Organic Chemistry and Technology at the University of Pardubice (Czech Republic)
  5. Czech Academy of Sciences (Czech Republic); Univ. of Chemistry and Technology (Czech Republic)
  6. Czech Academy of Sciences (Czech Republic); Univ. of Colorado, Boulder, CO (United States)

The singlet fission (SF) process discovered in bis(thienyl)diketopyrrolopyrroles (TDPPs) can boost their potential for photovoltaics (PV). The crystal structures of TDPP analogs carrying n-hexyl, n-butyl, or 2-(adamant-1-yl)ethyl substituents are similar, but contain increasingly slipped stacked neighbor molecules. The observed SF rate constants, kSF, (7±4), (9±3) and (5.6±1.9) ns–1 for thin films of the three compounds, respectively, are roughly equal, but the triplet quantum yields vary strongly: (120±40), (160±40) and (70±16), respectively. The recent molecular pair model reproduces the near equality of all three kSF at the crystal geometries and identifies all possible pair arrangements in which SF is predicted to be faster, by up to two orders of magnitude. Furthermore, it is also clear that the presently non-existent ability to predict the rates of processes competing with SF is pivotal for providing a guide for efforts to optimize the materials for PV.

Research Organization:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0007004
OSTI ID:
1854332
Journal Information:
ChemPlusChem, Vol. 85, Issue 12; ISSN 2192-6506
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English

References (53)

Solar conversion efficiency of photovoltaic and photoelectrolysis cells with carrier multiplication absorbers journal October 2006
Glotaran : A Java -Based Graphical User Interface for the R Package TIMP journal January 2012
Recent Advances in Singlet Fission journal April 2013
Direct observation of rotational diffusion by picosecond spectroscopy journal October 1976
Electrochemical and optical properties of molecular triads based on triphenylamine, diketopyrrolopyrrole and boron-dipyrromethene journal August 2015
Synthesis and Characterization of Teranthene: A Singlet Biradical Polycyclic Aromatic Hydrocarbon Having Kekulé Structures journal August 2010
Is the Chemical Strategy for Imbuing “Polyene” Character in Diketopyrrolopyrrole-Based Chromophores Sufficient for Singlet Fission? journal February 2017
Structure and photophysics of indigoids for singlet fission: Cibalackrot journal November 2019
Singlet Fission: Optimization of Chromophore Dimer Geometry book May 2017
Theoretical Investigation of Singlet Fission in Molecular Dimers: The Role of Charge Transfer States and Quantum Interference journal June 2014
Photophysical and photochemical properties of Ni(II), Pd(II) and Pt(II) aryloxo and alkylthio derivatised phthalocyanine journal June 2010
Ultra-fast spin-mixing in a diketopyrrolopyrrole monomer/fullerene blend charge transfer state journal January 2017
Theoretical study on the complexation of bambus[6]uril with the chloride, bromide, and iodide anions journal June 2011
Molecular Packing and Singlet Fission: The Parent and Three Fluorinated 1,3-Diphenylisobenzofurans journal March 2019
Singlet Biradical Character of Phenalenyl-Based Kekulé Hydrocarbon with Naphthoquinoid Structure journal January 2007
Effects of Crystal Morphology on Singlet Exciton Fission in Diketopyrrolopyrrole Thin Films journal February 2016
Singlet Fission for Dye-Sensitized Solar Cells:  Can a Suitable Sensitizer Be Found? journal December 2006
Mechanism of Singlet Fission in Thin Films of 1,3-Diphenylisobenzofuran journal May 2014
Morphology-Independent Efficient Singlet Exciton Fission in Perylene Diimide Thin Films journal February 2018
Theoretical Modeling of Singlet Fission journal April 2018
Density‐functional thermochemistry. III. The role of exact exchange journal April 1993
Optimal Arrangements of Tetracene Molecule Pairs for Fast Singlet Fission journal December 2019
Theoretical Studies of Singlet Fission: Searching for Materials and Exploring Mechanisms journal February 2018
Occupation numbers of natural orbitals as a criterion for biradical character. Different kinds of biradicals journal March 1980
Triplet–Triplet Absorption Spectra of Organic Molecules in Condensed Phases journal January 1986
Charge-Transfer Character in a Covalent Diketopyrrolopyrrole Dimer: Implications for Singlet Fission journal October 2017
Effect of the substituent position on the electrochemical, optical and structural properties of donor–acceptor type acridone derivatives journal January 2020
Singlet Fission journal November 2010
Diketopyrrolopyrrole-Based Semiconducting Polymer for Photovoltaic Device with Photocurrent Response Wavelengths up to 1.1 μm journal January 2010
Photophysical, electrochemical and solid state properties of diketopyrrolopyrrole based molecular materials: importance of the donor group journal January 2014
Combined experimental and theoretical DFT study of molecular nanowires negative differential resistance and interaction with gold clusters journal October 2005
Identification of a triplet pair intermediate in singlet exciton fission in solution journal June 2015
Modeling Singlet Fission in Rylene and Diketopyrrolopyrrole Derivatives: The Role of the Charge Transfer State in Superexchange and Excimer Formation journal May 2017
Guidance for Mutual Disposition of Chromophores for Singlet Fission journal October 2015
Affinity capillary electrophoresis and density functional theory employed for the characterization of hexaarylbenzene-based receptor complexation with alkali metal ions journal March 2011
The calculations of excited-state properties with Time-Dependent Density Functional Theory journal January 2013
Excimers and Exciplexes journal June 1967
Time-dependent density functional theory within the Tamm–Dancoff approximation journal December 1999
Singlet fission in thin films of metallo-supramolecular polymers with ditopic thiophene-bridged terpyridine ligands journal January 2017
Singlet Fission via an Excimer-Like Intermediate in 3,6-Bis(thiophen-2-yl)diketopyrrolopyrrole Derivatives journal August 2016
The Role of Chromophore Coupling in Singlet Fission journal January 2013
Influence of Triplet Instabilities in TDDFT journal October 2011
Singlet Fission Rate: Optimized Packing of a Molecular Pair. Ethylene as a Model journal September 2019
Laser Generation of Excitons and Fluorescence in Anthracene Crystals journal January 1965
Pd(II) Phthalocyanine-Sensitized Triplet−Triplet Annihilation from Rubrene journal April 2008
Synthesis and photoproperties of diamagnetic octabutoxyphthalocyanines with deep red optical absorbance journal October 1990
Tunable Emission from Triplet Fusion Upconversion in Diketopyrrolopyrroles journal February 2019
A pseudo Newton-Raphson method for function minimization journal November 1972
Synthesis and characterization of tetra-substituted palladium phthalocyanine complexes journal January 2013
Global and target analysis of time-resolved spectra journal July 2004
Fityk : a general-purpose peak fitting program journal September 2010
Mapping the Relation between Stacking Geometries and Singlet Fission Yield in a Class of Organic Crystals journal March 2013
Singlet Fission Involves an Interplay between Energetic Driving Force and Electronic Coupling in Perylenediimide Films journal January 2018