2007-04-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/694381摘要：在這過去的一年中，我們在半導體材料與元件的研究具有多項重要的成果。首先我們從理論背景出發設計、研製並分析一個新穎的液晶元件，其具有內建的太陽電池結構，此特殊元件可以在不外加電壓而使用光線就可以轉動液晶分子，這個研究在液晶元件開啟了一個新的探索方向，相信未來是極有擴張的潛力。藉由半導體奈米柱與金屬的複合物，我們成功的將能隙發光提昇了超過一百倍，同時缺陷發光降低到了不可量測的信號範圍，此成果對於日後的發光元件研發定會有幫助，此外，我們亦利用鑭鍶錳氧合金作奈米蝕刻的光阻劑，此材料具有非毒性可融於水的特性，擁有改進環保的優點，同時可以作成磁性的陣列，亦可以藉由電子束的劑量大小控制成為正或負光阻，對於奈米蝕刻領域是一重大突破，在理論研究方面，我們探討了二維電子系統之自旋與軌域角動量之霍爾電流，而發現自旋霍爾電導率與軌道角動量霍爾電導率不會互相抵消，因而證實自旋霍爾電流存在的可能性，我們相信這些結果不論是在學術研究上或是在工業應用上都是非常重要的。<br> Abstract: During the last year, we have accomplished several important contributions in the studies of nanoscale semiconductor materials and devices. We have designed, fabricated, and characterized a novel liquid crystal device with built-in solar cells, which enables to drive liquid crystal molecules without an external bias. By the composite of semiconductor nanorods and metal nanoparticles, we are able to enhance the band gap emission by two order of magnitude. This result should be very important for the application of solid state emitters. Nanolithography made from water-based spin-coatable lanthanum strontium manganese oxide resist has been developed for the first time. The patterned lanthanum strontium manganese oxide can be developed using nontoxic and environmentally friendly pure water, and the resist can fabricate active magnetic patterns directly by electron beam exposure. In addition, this newly developed resist can be fabricated into either positive or negative patterns easily by varying the electron doses. In terms of the theoretical study, we have investigated spin and orbital angular momentum Hall current in a two-dirnensional electron system with spin-orbit coupling. We found that the spin Hall conductivity in general would not be cancelled by the orbital angular momentum Hall conductivity. All these results are very significant for both of academic interests as well as industrial applications.奈米半導體材料液晶發光元件光阻劑nanoscale semiconductorliquid crystallight emitting deviceresist