Effects of humidity on unencapsulated poly(thiophene) thin-film transistors Journal Articles uri icon

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abstract

  • The effects of humidity on unencapsulated polymeric thin-film transistors (TFTs) of poly[5,5’-bis(3-dodecyl-2-thienyl)-2,2’-bithiophene] (PQT-12) were investigated. The field effect mobility of PQT-12 TFTs decreases and the rate of trapping of charge carriers increases under increasing humidity. The amount of water absorbed by the PQT-12 films was measured using a quartz crystal microbalance. Thin films of PQT-12 absorb comparable amounts of water to the carrier concentration in TFTs under routine operating conditions (humidity of 30% relative humidity and gate voltage of −30V); the changes in electrical characteristics under humid atmospheres are attributed to the interaction of absorbed water with the carriers in the film.

authors

  • Chabinyc, Michael L
  • Endicott, Fred
  • Vogt, Bryan D
  • DeLongchamp, Dean M
  • Lin, Eric K
  • Wu, Yiliang
  • Liu, Ping
  • Ong, Beng S

publication date

  • March 13, 2006