Using Spatial Confinement to Decipher Polymorphism in Organic Semiconductors p-DTS(FBTTh2)2

Sara Marina, Matthew Dyson, Xabier Rodriguez-Martinez, Obadiah Reid, Ruipeng Li, Garry Rumbles, Detlef Smilgies, Aram Amassian, Mariano Campoy-Quiles, Natalie Stingelin, Jaime Martin

Research output: Contribution to journalArticlepeer-review


Many molecular semiconductors show a pronounced polymorphism; i.e. they can adopt different crystal arrangements depending, e.g., on temperature, pressure, and selected solidification pathways. This renders reliable fabrication of molecular semiconductor devices challenging, as minute changes in processing can lead to numerous structures and, hence, optoelectronic responses. Here, we demonstrate using the example of p-DTS(FBTTh2)2 that spatial confinement at the nanoscale can be exploited to detect specific polymorphs and the conditions under they form. A new polymorph exhibiting a higher charge-carrier mobility compared to previously reported p-DTS(FBTTh2)2 crystal forms is found at elevated temperatures and high degree of confinement, illustrating the benefit of our approach and promising that spatial confinement will find wide-spread application to understand and control polymorph formation in organic semiconductors.
Original languageAmerican English
Pages (from-to)2410-2415
Number of pages6
JournalJournal of Materials Chemistry C
Issue number7
StatePublished - 2024

NREL Publication Number

  • NREL/JA-5900-87921


  • organic semiconductor
  • solar-photochemistry
  • TRMC


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