【摘要】：固態(tài)非易失性光學(xué)涂層顯示結(jié)構(gòu)(Solid-state Non-volatile Optical Coatings Display)是基于光學(xué)涂層和相變材料這兩種技術(shù)的結(jié)合發(fā)展而來(lái)的一項(xiàng)新型動(dòng)態(tài)顯示技術(shù)。通過(guò)熱累積,相變材料可以在晶態(tài)和非晶態(tài)兩種相態(tài)之間進(jìn)行快速可逆的轉(zhuǎn)變,并伴隨有材料電學(xué)和光學(xué)特性的劇烈改變,因此被廣泛應(yīng)用在光學(xué)器件、光學(xué)存儲(chǔ)、電學(xué)存儲(chǔ)器件中。另一方面,光學(xué)涂層則是基于薄膜干涉現(xiàn)象實(shí)現(xiàn)的薄膜器件,通過(guò)調(diào)節(jié)膜層厚度對(duì)特定光波段的反射和吸收進(jìn)行調(diào)控。結(jié)合以上兩種技術(shù),超薄的強(qiáng)吸收材料和光學(xué)反射面結(jié)合形成的光學(xué)涂層,再利用相變材料相態(tài)可變的特性,可以實(shí)現(xiàn)多種明亮色彩的動(dòng)態(tài)切換顯示。在這項(xiàng)新型技術(shù)中,整個(gè)顯示結(jié)構(gòu)的顏色變化可以通過(guò)改變相變材料Ge_2Sb_2Te_5(GST)的相態(tài)來(lái)實(shí)現(xiàn),而相態(tài)的變化可以由位于相變材料上下的兩層導(dǎo)電材料氧化銦錫(ITO)通電流來(lái)實(shí)現(xiàn)電致相變。憑借相變材料的其他特點(diǎn),這種顯示結(jié)構(gòu)還具有非易失性(即掉電后顯示內(nèi)容仍然保持)、顯示功耗低、顯示內(nèi)容切換高速、柔性兼容性好、不依賴(lài)于襯底材料、可實(shí)現(xiàn)大面積顯示器、制造工藝簡(jiǎn)單等諸多優(yōu)點(diǎn),在新型顯示領(lǐng)域具有廣泛的應(yīng)用前景。本文初步研究了 ITO材料的熱致晶化現(xiàn)象和其與反射面結(jié)合的薄膜干涉效應(yīng),并深入研究了在基于相變材料設(shè)計(jì)的固態(tài)顯示結(jié)構(gòu)中,相變材料GST和導(dǎo)電材料ITO這兩層材料各自所起到的作用。本課題發(fā)現(xiàn)了 ITO的晶化和GST的相態(tài)變化都對(duì)整個(gè)結(jié)構(gòu)的顏色改變有重要的影響,這是在此前的研究中從未報(bào)道的內(nèi)容。實(shí)驗(yàn)發(fā)現(xiàn),在本文研究的顯示結(jié)構(gòu)中,ITO甚至比GST對(duì)顯示顏色的改變更重要�！け狙芯客瑫r(shí)也進(jìn)行了仿真光學(xué)涂層結(jié)構(gòu)顏色的相關(guān)工作,利用材料固有的光學(xué)性質(zhì)參數(shù),計(jì)算模擬得到多層薄膜的顯示顏色�；谝陨蠈�(shí)驗(yàn)結(jié)果和仿真結(jié)果,本研究發(fā)展出了 一種同時(shí)利用GST和ITO特性,使顯示性能更優(yōu)化的新型顯示器結(jié)構(gòu)。本研究還初步探索了利用相變材料的多級(jí)相變,實(shí)現(xiàn)光學(xué)涂層顏色的連續(xù)顯示和更精細(xì)的調(diào)控。
[Abstract]:Solid state nonvolatile optical coating display structure (Solid-state Non-volatile Optical Coatings Display) is a new dynamic display technology based on the combination of optical coating and phase change materials. By thermal accumulation, phase change materials can change rapidly and inversely between crystalline and amorphous phase states, accompanied by drastic changes in electrical and optical properties of materials, so they are widely used in optical devices and optical storage. In electrical memory devices. On the other hand, optical coating is a kind of thin film device based on the phenomenon of thin film interferometry, which regulates the reflection and absorption of a specific wavelength by adjusting the thickness of the film. Combined with the above two techniques, the optical coating formed by the combination of ultra-thin strong absorption materials and optical reflectors, and the variable phase state of phase change materials, can realize the dynamic switching display of various bright colors. In this new technique, the color change of the whole display structure can be achieved by changing the phase state of the phase change material (Ge_2Sb_2Te_5 (GST). The change of phase state can be realized by the current of indium tin oxide (ITO) in the two layers of conductive material above and below the phase change material. By virtue of other characteristics of the phase change material, the display structure is also non-volatile (that is, the display content remains after power off), the display power consumption is low, the display content is switched high speed, the flexibility compatibility is good, does not depend on the substrate material, It has many advantages, such as large area display, simple manufacturing process and so on. It has a wide application prospect in the new display field. In this paper, the thermally induced crystallization of ITO materials and the film interference effect combined with the reflectors are studied, and the solid state display structure based on the phase-change materials is studied in detail. Phase change material (GST) and conductive material (ITO) play their respective roles. It is found that both the crystallization of ITO and the phase change of GST have important effects on the color change of the whole structure, which has never been reported in previous studies. It is found that in the display structure studied in this paper, the change of color is even more important than that of GST. At the same time, the related work of simulating the color of optical coating structure is also carried out, and the intrinsic optical properties of the material are used. The display color of the multilayer film is obtained by computer simulation. Based on the above experimental results and simulation results, a new display structure is developed, which utilizes the characteristics of GST and ITO at the same time and optimizes the display performance. In this study, the multistage phase transition of the phase change material is used to realize the continuous display of the color of the optical coating and the finer control.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN873

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本文編號(hào)：2160098