摘要:本計畫將針對液晶光電、液晶薄膜與生物薄膜材料進行物性和結構之研究。前期計畫執行上述主題已有相當豐富的研究成果出現,(1)我們首次使用共軛高分子做為液晶膠聚合材料,利用共軛高分子其 pi 電子的非局域性,使得共軛高分子網絡可在較低的電壓能驅動液晶,這在液晶領域中是一個重大的發現,這項技術的突破可用來製作高效率液晶螢幕,並可用來製作極為省電之節能玻璃,達到冬暖夏涼以及節能之功效; (2)我們首次引入液體摻雜技術於液晶顯示元件內,我們成功降低了驅動電壓、加快了反應時間並保有一定高的 VHR 電壓保持率和對比度; (3)本團隊使用液晶作為光學調制器,可調整藍光 LED 搭配黃色螢光粉所產生之色偏的問題,本發明可解決目前與螢光粉搭配之藍光 LED 其產生藍光傷害之問題; 以及(4)本人團隊利用高導電 PEDOT:PSS 高分子首度成功製做 ITO-Free 液晶顯示器,其導電度可媲美 ITO 材料,往後本研究可朝向取代 ITO,並製作 ITO-free 軟基板可撓式元件來發展。我們將在本計畫中繼續進行這些相關研究,並透過本計畫各項新研究子題之整體規劃、預定完成之主題和方向,相信本團隊能夠在液晶光電領域繼續保持創新,並且透過計畫之執行更有助於推動本實驗室在世界上液晶薄膜光電領域之優勢和領先地位。
在其他液晶薄膜與軟物質相關的主題中,我們成功利用轉印技術改善有機太陽能之效率,另外也在奈米液晶配向、熱拉引微影技術、與軟基板微陣列透鏡的應用上也做出貢獻,我們開發的這種能製作複雜且大面積奈米圖案的熱拉引微影技術它不需要脫膜的過程所以其操作更為簡單,且拉引出來的奈米圖案其邊緣非常整齊,相信這項技術未來會有很多的應用性。在本次所提的計畫中我們會繼續拓展這項技術在液晶光電顯示與其他生物領域方面的應用,例如在微流通道、生物晶片、與應用在有機電子和光電科技等領域應該都有相當高的應用價值。此外,在生物薄膜材料部分,我們致力於使用電子顯技術研究急凍薄冰中的蛋白質結構,本團隊過去利用生物電鏡首度發現蚯蚓血紅蛋白之動態攜氧協同機制及其形成之原因,我們解出近原子級解析之血紅蛋白結構,並且發現此蛋白之高攜氧協同效應之機制,由於此蛋白之高攜氧率(人類之 36~144 倍)與低自氧化速率等特性,期待未來可對缺氧型急性重症之醫療帶來新的曙光。此次計畫申請將承續並開展上述所提之各項研究工作,並同時開展本計畫所擬定的各項新研究子題,以期能得到更多豐盛的成果。
Abstract: The project is to study the physical properties and structure of LC optoelectronics, LC films, and biological thin-film materials. Many fruitful results have been obtained in previous project, and we describe them as following. (1) We fabricated a supramolecular LC gel using pi-conjugated polymer for the first time. This technique enables us to drive LCs at lower driving voltage, and also decreases the response times of LC molecules. This finding is a major discovery in LC field, and the breakthrough technology can be used to not only produce the high-quality LCD, but also make the energy-saving glass. (2) We first introduce the liquid doping in LC device, and this method helps to reduce the driving voltage and the response times while keeping the high voltage-holding ratio and contrast as well. (3) Our team adopted LC cell as electronic light valve to adjust the color temperature shift of LED device to reduce the blue damage problem. (4) We first fabricated a ITO-free LC device using PEDOT:PSS film with high electron mobility. This study will be facing to replace ITO film in the future, and the development of ITO-free flexible device will be further continued. We will continue to conduct these studies and maintain innovation in this project. Through the overall planning of the new sub-titles, the themes and achievements will be scheduled to complete.
Further, in the field of LC films and soft matter subjects, we conducted research on heterojunction organic solar cell, and our team successfully improved the conversion efficiency by means of CF3-silane modification using soft imprinting fabrication technique to replace conventional PEDOT:PSS layer. In addition, we have made some contributions in LC alignment, soft lithography, and flexible polymer microlens array. We invented an unique thermal drawing lithography (TDL) which can produce a complex and large-area nanopatterns. This technique is different from the nano-imprinting technique by Prof. S. Y. Chou. The TDL dose not require the difficult demolding process so it can easily produce nanopatterns without damage. Especially, the edge of nano patterns obtained by TDL is always very clean and neat. Hence, we believe the TDL will have many useful applications in the near future. In the project topics we proposed here, we will continue to expand this TDL technique in the LCDs and other research areas, such as microfluidics, biochips, and their applications in organic electronics and optoelectronics should also have a considerable high value. On the other hand, in the field of biological thin films, we will use electron microscope to solve the structure of proteins embedded in the thin vitrified ice film. In 2015, our team reported the first study on the cooperative mechanism in the Lumbricus terrestris hemoglobin and found how the hemoglobin was formed and assembled together. Due to this hemoglobin protein with high oxygen-carrying rate (36~144 times human) and low self-oxidation rate, these good characteristics have shed a new light to the therapy of severe acute hypoxia diseases. In this project, we will continue these studies and also carry out new sub-titles listed in this project, in order to get more fruitful results.