TY - JOUR
AU1 - Bulgarevich, Kirill
AU2 - Sakamoto, Kenji
AU3 - Yasuda, Takeshi
AU4 - Minari, Takeo
AU5 - Takeuchi, Masayuki
AB - Bias‐stress resistance of polymer‐based organic field‐effect transistors (OFETs) is considerably enhanced by coating the gate dielectric surface with an amorphous perfluoropolymer (CYTOP). In bottom‐gate (BG) OFETs offering a relatively simple fabrication process, the CYTOP coating causes a serious problem; that is, thin film formation of organic semiconducting polymers generally fails due to the lyophobic properties of CYTOP. This problem is solved by patterning the CYTOP coating layer with suitable designs. Here, a simple photo‐patterning method is established using CYTOP terminated with amidosilyl functional groups. This method is composed of self‐limited thinning process of CYTOP coating layers, exposure to vacuum ultraviolet light through a photomask, and development. BG/top‐contact OFET arrays are fabricated using poly(2,5‐bis(3‐hexadecylthiophene‐2‐yl)thieno[3,2‐b]thiophene) as the semiconducting polymer. The initial electrical properties and bias‐stress resistance are compared with those of OFETs with octadecyltrichlorosilane (ODTS)‐treated gate dielectrics. The CYTOP‐ and ODTS‐OFETs show approximately the same initial electrical properties with very small device‐to‐device variation, while the CYTOP‐OFETs exhibit much higher intrinsic bias‐stress resistance. Therefore, the spin‐coating combined with the simple photo‐patterning method is a promising technique that can form polymeric organic semiconductor layers on CYTOP layers and produce BG OFETs exhibiting very high operational stability.
TI - Operational Stability Enhancement of Polymeric Organic Field‐Effect Transistors by Amorphous Perfluoropolymers Chemically Anchored to Gate Dielectric Surfaces
JF - Advanced Electronic Materials
DO - 10.1002/aelm.202000161
DA - 2020-07-01
UR - https://www.deepdyve.com/lp/wiley/operational-stability-enhancement-of-polymeric-organic-field-effect-kIBT00Rywt
SP - n/a
EP - n/a
VL - 6
IS - 7
DP - DeepDyve
ER -