Kim, Youngrok Chung, Seungjun Cho, Kyungjune Harkin, David Hwang, Wang-Taek Yoo, Daekyoung Kim, Jae-Keun Lee, Woocheol Song, Younggul Ahn, Heebeom Hong, Yongtaek Sirringhaus, Henning Kang, Keehoon Lee, Takhee 2024-01-19T20:32:10Z 2024-01-19T20:32:10Z 2021-09-02 2019-03-08 0935-9648 https://pubs.kist.re.kr/handle/201004/120221 Organic semiconductors (OSCs) have been widely studied due to their merits such as mechanical flexibility, solution processability, and large-area fabrication. However, OSC devices still have to overcome contact resistance issues for better performances. Because of the Schottky contact at the metal-OSC interfaces, a non-ideal transfer curve feature often appears in the low-drain voltage region. To improve the contact properties of OSCs, there have been several methods reported, including interface treatment by self-assembled monolayers and introducing charge injection layers. Here, a selective contact doping of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F-4-TCNQ) by solid-state diffusion in poly(2,5-bis(3-hexadecylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) to enhance carrier injection in bottom-gate PBTTT organic field-effect transistors (OFETs) is demonstrated. Furthermore, the effect of post-doping treatment on diffusion of F-4-TCNQ molecules in order to improve the device stability is investigated. In addition, the application of the doping technique to the low-voltage operation of PBTTT OFETs with high-k gate dielectrics demonstrated a potential for designing scalable and low-power organic devices by utilizing doping of conjugated polymers. English WILEY-V C H VERLAG GMBH LAYER DEPOSITION ALD DOPANT DIFFUSION HIGH-MOBILITY ZINC PHTHALOCYANINE PERFORMANCE TRANSPORT POLYMERS TETRAFLUOROTETRACYANOQUINODIMETHANE ELECTRODES ANISOTROPY Enhanced Charge Injection Properties of Organic Field-Effect Transistor by Molecular Implantation Doping Article 10.1002/adma.201806697 1 ADVANCED MATERIALS, v.31, no.10 ADVANCED MATERIALS 31 10 scie scopus 000460329300018 2-s2.0-85060552357 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article LAYER DEPOSITION ALD DOPANT DIFFUSION HIGH-MOBILITY ZINC PHTHALOCYANINE PERFORMANCE TRANSPORT POLYMERS TETRAFLUOROTETRACYANOQUINODIMETHANE ELECTRODES ANISOTROPY charge injection doping F-4-TCNQ organic field-effect transistors PBTTT solid-state diffusion