本文選題：有機(jī)小分子材料　切入點(diǎn)：電荷捕獲　出處：《南京郵電大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：有機(jī)小分子材料具有柔性、易于裁減、綠色加工、生產(chǎn)成本低的優(yōu)點(diǎn),近年來被廣泛應(yīng)用于有機(jī)電子器件領(lǐng)域,其中之一就是作為有機(jī)存儲器件的電荷捕獲層。作為下一代高密度存儲器的候選者,電荷捕獲型存儲器一直是相關(guān)基礎(chǔ)研究和產(chǎn)業(yè)開發(fā)的重點(diǎn),電荷在捕獲層中的存儲位置、空間分布情況直接影響到器件的編寫、擦除和保持能力,是決定器件實(shí)際性能的重要因素。為了深入認(rèn)識該類材料的電學(xué)特性,進(jìn)一步挖掘材料的光電屬性從而改善器件的性能,我們在微納尺度上對材料的電學(xué)特性展開研究。近年來,靜電場力顯微鏡(EFM)與開爾文掃描探針顯微鏡(KPFM)以其廣泛適用各類材料以及高分辨率的優(yōu)勢,在電學(xué)領(lǐng)域的研究中脫穎而出。我們的工作利用EFM與KPFM對有機(jī)小分子薄膜材料展開研究,得到了有關(guān)材料的電學(xué)特性,具體包括:(1)對位阻型有機(jī)小分子材料DSFXPY薄膜捕獲電荷的注入、存儲能力展開定性定量分析,對不同厚度DSFXPY薄膜的存儲性能進(jìn)行對比分析,發(fā)現(xiàn)DSFXPY薄膜中無明顯橫向擴(kuò)散屬性,且薄膜中空穴的保持性能優(yōu)于電子的保持性能;(2)對位阻型有機(jī)小分子材料SFDBAO與PS共混膜捕獲電荷的注入、存儲展開定性定量分析,對不同摻雜濃度的PS/SFDBAO共混膜存儲性能進(jìn)行對比分析,發(fā)現(xiàn)SFDBAO與PS共混后可以大幅提升空穴的存儲密度與保持能力,PS/SFDBAO共混膜中無明顯橫向擴(kuò)散屬性,PS/SFDBAO-10%薄膜有最優(yōu)的空穴保持性能;(3)對n型有機(jī)小分子C_(60)與PS共混膜捕獲電荷注入、存儲展開定性定量展開分析,對不同摻雜濃度的PS/C_(60)共混膜存儲性能對比分析,發(fā)現(xiàn)PS/C_(60)-15%薄膜有最優(yōu)的保持性能。此外,還著重分析了薄膜中捕獲電荷的擴(kuò)散、擦除機(jī)制,發(fā)現(xiàn)PS/C_(60)共混膜中捕獲的電子更易被擦除;PS/C_(60)共混膜中雖然同時(shí)存在橫向擴(kuò)散與縱向擴(kuò)散,但縱向擴(kuò)散才是電荷擴(kuò)散的主導(dǎo)機(jī)制。我們的研究工作證明DSFXPY與PS/SFDBAO共混膜都具有良好的電荷局域能力以及保持能力,是有望應(yīng)用于高密度有機(jī)存儲器件的理想材料,而PS/C_(60)共混膜則擁有縱向擴(kuò)散為主導(dǎo)的電學(xué)特性。隨著有機(jī)材料微納尺度電學(xué)性能更深層次研究,我們相信有機(jī)小分子薄膜材料也將進(jìn)一步展現(xiàn)出自身獨(dú)特的物理特性,在有機(jī)電子學(xué)領(lǐng)域得到充分的應(yīng)用。
[Abstract]:Organic small molecular materials have the advantages of flexibility, easy reduction, green processing and low production cost, so they have been widely used in the field of organic electronic devices in recent years. As a candidate for the next generation of high density memory, charge capture memory has always been the focus of basic research and industrial development, and the storage location of charge in the capture layer. The spatial distribution directly affects the device preparation, erasure and retention ability, which is an important factor to determine the actual performance of the device. Further excavating the optoelectronic properties of materials to improve the performance of devices, we have studied the electrical properties of materials at the micro- and nanoscale scale. Electrostatic Field Force microscope (EFM) and Kelvin scanning probe microscope (KPFM) have the advantages of wide application of various materials and high resolution. Our work uses EFM and KPFM to study the organic small molecule thin film materials, and obtains the electrical properties of the related materials. It includes: 1) injection of trapping charge, qualitative and quantitative analysis of storage capacity of DSFXPY thin film, and comparison and analysis of storage properties of DSFXPY thin films with different thickness. It is found that there is no obvious transverse diffusion property in DSFXPY thin films. The hole retention performance of the film is better than that of electron retention. It can be used to inject the trapping charge of the SFDBAO / PS blend film, and to develop the qualitative and quantitative analysis of the storage. The storage performance of PS/SFDBAO blend films with different doping concentrations was compared and analyzed. It was found that the storage density and retention capacity of PS / PS blends could be greatly enhanced by SFDBAO / SFDBAO blend. There was no obvious transverse diffusion property in PSP / SFDBAO-10% films. PS/ SFDBAO-10% films had the best hole retention performance. The qualitative and quantitative analysis of storage expansion and the comparative analysis of storage performance of PS / C / C _ (60) / P / C _ (60) / S / C _ (60) / C _ (60) / C _ (60) / C _ (60) / C _ (60) / C _ (60) / C _ (60) / C _ (60) / C _ (60) / C _ (60) / C _ (60) / C _ (. It was found that the electrons trapped in the PS/ CST60) blend membrane were more easily erased, although there were both transverse and longitudinal diffusions in the blend film. But the longitudinal diffusion is the dominant mechanism of charge diffusion. Our work has proved that the DSFXPY / PS/SFDBAO blend film has good charge localization and retention ability, and is an ideal material for high density organic memory devices. And the PS / C / C / C 60) blend film has a longitudinal diffusion-dominated electrical property. With the deeper study of the micro- and nanoscale electrical properties of organic materials, we believe that the organic small molecular thin films will further exhibit their own unique physical properties. It has been fully applied in the field of organic electronics.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP333;TB383.2

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本文編號：1572155