Probing the interfacial molecular packing in TIPS-pentacene organic semiconductors by surface enhanced Raman scattering

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung


  • Jie Xu - , Nanjing University (Autor:in)
  • Ying Diao - , Stanford University (Autor:in)
  • Dongshan Zhou - , Nanjing University (Autor:in)
  • Yisha Mao - , Stanford University (Autor:in)
  • Gaurav Giri - , Stanford University (Autor:in)
  • Wei Chen - , Nanjing University (Autor:in)
  • Nan Liu - , Stanford University (Autor:in)
  • Stefan C.B. Mannsfeld - , Stanford University, SLAC National Accelerator Laboratory (Autor:in)
  • Gi Xue - , Nanjing University (Autor:in)
  • Zhenan Bao - , Stanford University (Autor:in)


In organic thin film transistors (OTFTs), the molecular structure of the first few monolayers at the semiconductor-dielectric interface is crucial to the device performance. The assumption of homogeneous molecular packing throughout the thickness of the film is not always valid considering interfacial effects. However, it remains challenging to unambiguously determine the molecular packing at both the top surface and the buried bottom interface, due to the lack of a nanoscopic tool. Here we show that a combination of Raman spectroscopy and surface enhanced Raman scattering (SERS) provides a means for effective characterization of the interfacial packing in 6,13- bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene) films. We observed that the TIPS-pentacene crystal lattices assume a non-equilibrium packing state near the substrate interface, which gradually relaxes towards equilibrium packing near the top interface. Our investigation suggests the existence of non-equilibrium molecular packing for TIPS-pentacene.


Seiten (von - bis)2985-2991
FachzeitschriftJournal of Materials Chemistry. C, Materials for optical and electronic devices
PublikationsstatusVeröffentlicht - 29 Jan. 2014
Extern publiziertJa


Forschungsprofillinien der TU Dresden

ASJC Scopus Sachgebiete