Study On Light-Trigged Floating Gate Field-Effect Transistor Nonvolatile Memory

Organic field-effect transistor?OFET?memory is core members in organic electronics family.Organic field-effect transistor?OFET?memory devices have attracted extensive attention of researchers and got rapid developments due to their advantages of nondestructive read-out,easily integrated structure,easy preparation and well compatibility with flexible substrate.Organic memory is an important supplement to traditional semiconductor memory,which expands the application scope of information storage.However,the performances of the memory devices as well as the memory mechanism and storage stability still need urgently to be solved.In this thesis,a series of light-trigged floating-gate OFET memory devices are fabricated and their corresponding working mechanism and performance are analysed in detail.?1?The OFET memory devices based on Si/SiO₂/Cs PbBr₃/PMMA/Pentacene/Au structure and Si/SiO₂/PMMA/Cs PbBr₃/PMMA/Pentacene/Au structure are demonstrated,the effects of PMMA modification layer on the performance and storage stability of the OFET memory are investigated,and the stable performance structure of the device based on Cs PbBr₃ floating-gate is selected..The PMMA modified layer effectively eliminates the shallow charge trap,eliminates the volatile storage window and improves the storage stability.To provide a device structure support for the next study of floating gate morphology.?2?Different morphology of CsPbBr₃ floating gate organic field-effect transistor memory are demonstrated.The effect of floating-gate with different morphology on the performance of OFETs storage performance were studied.The device with optimized morphology of the Cs PbBr₃ floating-gate,has the highest Ion/Ioff of 106,and the stable retention time of more than 107 s.?3?The functions of PS tunneling matrix and Au NPs floating-gate were integrated into one active layer by one-step solution processing.The floating-gate OFET memory with this two-in-one dual-function layer was prepared and its memory performance was studied.