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Polymer‐modified solution‐processed metal oxide dielectrics on aluminum foil substrate for flexible organic transistors
Author(s) -
Sun QiJun,
Zhuang Jiaqing,
Yan Yan,
Zhou Li,
Zhou Ye,
Han SuTing,
Wu Wei,
Peng HaiYan,
Li Robert K. Y.,
Vellaisamy A. L. Roy
Publication year - 2016
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201600067
Subject(s) - materials science , substrate (aquarium) , dielectric , optoelectronics , oxide , silicon , transistor , field effect transistor , pentacene , foil method , gate dielectric , nanotechnology , thin film transistor , voltage , composite material , electrical engineering , metallurgy , layer (electronics) , oceanography , engineering , geology
Field‐effect transistors (FETs) employing the solution‐processed metal oxides as dielectrics have shown excellent performance on rigid silicon substrate. However, there have been very limited reports on FETs with solution‐processed, thermal‐annealed metal oxide dielectrics on low‐cost flexible substrates. To date, to our knowledge there is almost no report on flexible FETs having the similar or better performance than the FETs on Si substrate with solution‐processed, thermal‐annealed metal oxides as dielectrics. Herein, flexible pentacene‐based organic FETs have been demonstrated with polystyrene (PS)‐modified, solution‐processed yttrium oxide (Y 2 O 3 ), hafnium oxide (HfO 2 ), or aluminum oxide (Al 2 O 3 ) as dielectrics on commercially available aluminum (Al) foil substrates. The transistors exhibit a good carrier mobility ( µ ), a large on/off current ratio ( I on/off ), a low threshold voltage ( V T ), and a small subthreshold swing (SS) at a low‐operation voltage (−4 V), which is comparable with the device performance on rigid Si substrate. Therefore, the excellent electrical performance of the FETs on commercially available Al foil substrate, together with the virtue of light‐weight, makes the devices possess the promising potential for various electronic system applications.