Title :
Pentacene organic thin-film transistors-molecular ordering and mobility
Author :
Gundlach, D.J. ; Lin, Y.Y. ; Jackson, T.N. ; Nelson, S.F. ; Schlom, D.G.
Author_Institution :
Electron. Mater. & Process. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
fDate :
3/1/1997 12:00:00 AM
Abstract :
Pentacene-based organic thin-film transistors (TFT´s) with field-effect mobility as large as 0.7 cm/sup 2//V/spl middot/s and on/off current ratio larger than 10/sup 8/ have been fabricated. Pentacene films deposited by evaporation at elevated temperature at low-to-moderate deposition rates have a high degree of molecular ordering with micrometer-sized and larger dendritic grains. Such films yield TFT´s with large mobility. Films deposited at low temperature or by flash evaporation have small grains and poor molecular ordering and yield TFT´s with low mobility.
Keywords :
carrier mobility; dendritic structure; organic compounds; organic semiconductors; thin film transistors; vacuum deposited coatings; dendritic grains; evaporation; field-effect mobility; flash evaporation; molecular ordering; on/off current ratio; pentacene organic thin-film transistor; Active matrix liquid crystal displays; Amorphous silicon; Data mining; Dielectric substrates; Organic materials; Organic thin film transistors; Pentacene; Temperature; Thin film transistors; Threshold voltage;
Journal_Title :
Electron Device Letters, IEEE
