Abstract
Organic semiconductor single crystals(OSSCs)have shown their promising potential in high-performance organic field-effect transistors(OFETs).The interfacial dielectric layers are critical in these OFETs as they not only govern the key semiconductor/dielectric interface quality but also determine the growth of OSSCs by their wetting properties.However,reported interfacial dielectric layers either need rig-orous preparation processes,rely on certain surface chemistry reactions,or exhibit poor solvent re-sistance,which limits their applications in low-cost,large-area,monolithic fabrication of OSSC-based OFETs.In this work,polyethylene(PE)thin films and lamellar single crystals are utilized as the inter-facial dielectric layers,providing solvent resistive but wettable surfaces that facilitate the crystallization of 6,13-bis(tri-isopropylsilylethynyl)pentacene(TIPS-PEN)and 6,13-bis(triisopropylsilylethynyl)-5,7,12,14-tetraazapentacene(TIPS-TAP).As evidenced by the presence of ambipolar behavior in TIPS-PEN single crystals and the high electron mobility(2.3±0.34 cm2 V-1 s-1)in TIPS-TAP single crystals,a general im-provement on electron transport with PE interfacial dielectric layers is revealed,which likely associates with the chemically inertness of the saturated C-H bonds.With the advantages in both processing and device operation,the PE interfacial dielectric layer potentially offers a monolithic way for the enhance-ment of electron transport in solution-processed OSSC-based OFETs.
基金项目
国家重点研发计划(2019YFE0116700)
国家重点研发计划(2019YFA0705900)
科技部项目()
国家自然科学基金(51873182)
国家自然科学基金(52103231)
Zhejiang Province science and Technology Plan(2021C04012)
浙江省科技厅项目()
Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(2021SZ-FR003)
中央高校基本科研业务费专项(226-2023-00113)
NETL
NSTL
万方数据