Photophysics and photochemistry of functionalized anthradithiophene in microcavities

Winston T. Goldthwaite, Roshell Lamug, Jonathan D.B. Van Schenck, Richard Puro, John E. Anthony, Oksana Ostroverkhova

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We present a study of photodegradation in functionalized anthraditiophene (diF TES-ADT)-based films in hybrid cavities composed of distributed Bragg reflector (DBR) bottom mirror and top silver (Ag) mirror, depending on two different DBR reflectivity stopbands. The concentration of diF TES-ADT was chosen such that the films contain molecules in "amorphous"and "aggregate"phases characterized by different optical absorption spectra. We demonstrate that the cavity photon preferentially couples to the molecules in the "amorphous"phase and observe different photodegradation, attributed to photodimerization, dynamics for cavity photon-coupled and uncoupled states. The presence of the longer lived emissive states, such as entangled triplet pair (TT) states formed in the process of singlet fission, was correlated with a faster photodimerization dynamics. The observed cavity-dependent photodimerization dynamics offers an opportunity to manipulate the reaction rates and yield with cavity characteristics.

Original languageEnglish
Title of host publicationPhysical Chemistry of Semiconductor Materials and Interfaces XXI
EditorsAndrew J. Musser, Derya Baran
ISBN (Electronic)9781510653825
StatePublished - 2022
EventPhysical Chemistry of Semiconductor Materials and Interfaces XXI 2022 - San Diego, United States
Duration: Aug 23 2022Aug 24 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferencePhysical Chemistry of Semiconductor Materials and Interfaces XXI 2022
Country/TerritoryUnited States
CitySan Diego

Bibliographical note

Funding Information:
We thank V. S. Jain for the AFM measurements. This work was supported by the National Science Foundation (NSF) (Grant No. CHE-1956431). Device fabrication and characterization was made possible by the NSF MRI DMR-1920368 and NNCI:NNI EECS-2025489 awards.

Publisher Copyright:
Copyright © 2022 SPIE.


  • exciton polaritons
  • Organic semiconductors
  • photodimerization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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