The Study Of Conjugated And Non-conjugated Polymers Containing Iridium Complexes In Memory Devices

The information age is coming, the information people have to stored increase explodingly, andpeople ask new requirements to the modern memory devices. However, the modern memory basedon inorganic materials has the characteristics of fast storage, but because of the size of inorganicmaterials can not be infinitely narrowed, the technic of fabrication is complicated, the cost ofproduction is ultra-high,2D storage capacity of the device limits its storage density and otherdisadvantage, it can not meet the demand of people in information age. But the polymer and devicebased on organic materials have the advantage of easy processing, low cost, low powerconsumption, good stability, etc. They are most likely to become mainstream of the futurememory. At the same time, the transition metal complexes of iridium because of its metal center andligand structure can be designed freely, which has excellent photoelectric properties.So thetransition metal complexes of iridium are introduced into the framework of polymer. Thus thepolymer will not only have good optical performance, but both have the properties of the materialitself. For example, the properties of charge transfer, chemical stability, and film-forming material,etc.In this thesis, two series of polymers containing metal complexes of iridium were synthesizedby free radical polymerization and Suzuki coupling reaction, The polymers were characterized by1H NMR spectra and analysed their photophysical properties by thermo gravimetric analysis,electro-chemical, UV-visible absorption and so on. After that the polymer was dissolved andspin-coated to film on ITO glass, and then transferred to oven to anneal. Finally, a layer of thealuminum electrode was deposited on the polymer film, and thus the sandwiched structure ofprepared ITO/polymer film/aluminum layer in the device was made. Such a memory device wasput in the probe stage and connected by the positive and negative electrodes, semiconductorparameter analyzer through a given voltage was used to collect current, The I-V curve showed thatthe kind of memory, reading test illustrated the lifetime of the device, the test of retention timeshowed the stability of the device. The results showed that both polymers had a good memoryproperty.This paper extends the applications of polymer materials containing transition metal iridiumcomplexes in the use of organic electronic memory devices and the devices based on such materialsboth have good memory properties. Furthermore, this provides a guideline for the future design of new polymer materials containing transition metal iridium complexes used in electronic memorydevices. Meanwhile, the device performance of the polymer materials containing transition metaliridium complexes is very stable. They are promising candidates for the future organic electronicmemory devices.