Uiltrafast Photoinduced Carrier Dynamics of Organic Semiconductors Measured by Time-resolved Terahertz Spectroscopy


Esenturk O., Melinger J. S. , Lane P. A. , Heilweil E. J.

236th National Meeting of the American-Chemical-Society, Pennsylvania, United States Of America, 17 - 21 August 2008, vol.1039, pp.241-254 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 1039
  • City: Pennsylvania
  • Country: United States Of America
  • Page Numbers: pp.241-254
  • Middle East Technical University Affiliated: Yes

Abstract

Intrinsic properties of organic semiconductors are investigated by Time-Resolved Terahertz Spectroscopy (TRTS) to assess their relative mobilities and efficiencies. Our results are well correlated with device measurements and show the effectiveness and advantages of using this non-contact optical technique to rapidly identify prospective materials. After a brief introduction of the TRTS technique, we summarize our results from relative mobility measurements of the organic semiconductor polymers poly(3-hexylthiophene) (P3HT) and poly(2,5-bis(3-tetradecylthiophen-2yl)thieno[3,2-b]thiophene (PBTTT) as model active layers in transistor devices. We also synopsize our recent results from relative efficiency studies of blend and alternating multilayer films of zinc phthalocyanine (ZnPc) and buckminsterfullerene (C(60)) as model active nanolayers for efficient solar cells.