Design And Memory Properties Of Functionalized Porphyrin Molecules Study

With the rapid development of information technology and the advent of artificial intelligence,the requirements of electronic information storage products are becoming more urgent.As an important basic element of semiconductor electronic devices,the organic field-effect transistor non-volatile memory?OFET Memory?shows considerable application prospects in the fields of chip drivers,flexible integrated circuits and artificial neural networks.Therefore,the development of a solution for efficient OFET Memory has become the subject of research and manufacturing industries.Porphyrin,a kind of natural optoelectronic functional responsive organic semiconductor material,plays a vital role in the field of organic optoelectronics because of its unique?-conjugated ring structure and functionally modified reaction advantages.Thus,in this paper,the modified porphyrin unit is applied to the active electret layer in OFET Memory by theoretical design,and the performance of the memory device is explored from the perspective of its molecular structure,optical properties and electronic energy levels.To reveal the charge storage,transfer methods and storage capabilities,we investigated the intrinsic relationship between different porphyrin active groups and storage performance parameters including storage window,storage speed,maintenance time,and read-write erase cycle,etc.The main research contents are as follows:Part ?:We have synthesized alkylated modified 5,10,15,20-tetrakis?4-butoxyphenyl??4OC₄TPP?porphyrin molecule by typical Lindsey's method,and passed through acetate metal ion bonding in a solvent to prepare 5,10,15,20-tetrakis?4-butoxyphenyl?porphyrin zinc?Zn4OC₄TPP?,5,10,15,20-tetrakis?4-butoxy Phenyl?copper porphyrin?Cu4OC₄TPP?and 5,10,15,20-tetra?4-butoxyphenyl?porphyrin cobalt?Co4OC₄TPP?three metal coordination porphyrin molecules.Then we measured and analyzed on the spectral characteristics and electrochemical energy level properties of metal-porphyrins.Test and analyze the spectral characteristics and electrochemical energy level properties of metal-porphyrins,and study the performance of organic field-effect transistor memory such as storage window,maintenance time,and read-write erase cycle under light-regulated state of the storage device.To reveal the effect of metal-porphyrin molecules on charge storage performances and investigate the similarities and differences in the light erasability of different metal coordination electrets,We have tested and analyzed the spectral characteristics and electrochemical energy level properties of metal-coordinating porphyrins,and studied the performance of organic field-effect transistor memory such as storage window,maintenance time,and read-write erase cycle under light-regulated state of the storage device.Part ?:We designed and synthesized thienyl-porphyrin molecules through Lindsey's method.Then Friedel-Crafts reaction was carried out by using sp³-C site of fluorenyl tertiary alcohol molecule with thienyl porphyrin under BF₃.Et₂O as catalyst.Four porphyrin hydrazone molecules were prepared,such as unilateral modification?Ph FOH-1Th TPP?,bilateral modification?2Ph FOH-2Th TPP?,trilateral modification?3Ph FOH-3Th TPP?,and four-side modification?4Ph FOH-4Th TPP?.In this way,we have obtained a sterically interrupted steric structure molecular,which destroied the accumulation and aggregation effect between?-conjugated planes of porphyrins.In addition,we compared the differences in porphyrin fluorene-based molecular stericity in regulating spectral characteristics and energy level properties.To futher investigate the effect of fluorene-based hindered porphyrin electret on storage performance,we also measured and analyzed the effect of memory performance in OFET.Part ?:We synthesized the molecular structure of thienyl-porphyrin by molecular design,it was reacted with di-tertiary alcohol molecules at sp³-C site through Friedel-Crafts reaction,then a conjugate interrupted and angular"?"type fluorenyl porphyrin grid was prepared in dilute solution,wich exhibits separated HOMO/LUMO energy level,rigid and stable conformation,and nano-scale pore-like spatial structure.We inspected the differences in device on the basis of the unique structure through spectral and energy level changes,investigated the unique nano-scale pore-like spatial structure and the storage properties of fluorenyl latticed porphyrin molecules.It was found that this conjugated and interrupted wide band gap porphyrin molecular structure has certain development potential in improving the storage stability and tolerance of electrets..