2007-08-012024-05-15https://scholars.lib.ntu.edu.tw/handle/123456789/665536摘要：綠色的化工程序的概念在於節能、低污染、回收並生產高附加價值之綠色產品。此子計畫乃利用此一概念，研究低能耗的晶體生長技術，並回收廢棄之矽晶原料，用以開發高附加價值的能源與光電用途的晶體材料。此子計畫包括了四個主要研究項目：（一）晶體生長基礎與模擬研究; （二）晶體生長的外力控制技術開發研究; （三）切割矽泥回收與高溫純化生長與製作低價之太陽能電池;（四）低能耗的光電單晶材料之生長技術開發。 項目一與二是目前實驗室積極研究的基礎項目，包括了晶體生長物理的適應性相場模擬，侷限空間下的界面穩定性觀察研究，加速坩堝旋轉與角震動等外力控制之晶體生長觀察、製程模擬與技術開發，以期深入晶體生長物理的了解，提升製程效率，並增進晶體品質與組成均勻性。項目三包括了回收國內太陽能矽晶片製作時切割下的矽泥前處裡，高溫純化與晶體生長，並更進一步的製作低價的太陽能電池。項目四在延續我們過去三年開發的低能耗之區熔提拉專利技術，生長高附加價值的等計量比鉭酸鋰與藍光材料的基材晶體。這四個項目的進一步研發，可使得台大的光電晶體生長研究室，除了對國內太陽能與晶體材料產業有更大的貢獻外，在國際的晶體生長領域，可站居重要的地位。 <br> Abstract: The key concepts of the green chemical technology are to use less energy, produce lower emission, and recycle wastes to produce high added-value products. In this sub-project, based on these concepts, we propose to develop highly-efficient crystal growth and recycle technologies for the crystal materials used in photovoltaic and optoelectronic industries. To facilitate this, this proposal includes four research items: (1) crystal growth fundamentals and modeling; (2) crystal growth control using external forces; (3) recycle, purification, and crystal growth of kerf-loss silicon for solar cell fabrication; (4) low-energy crystal growth of strategic optoelectronic materials.. The items one and two are fundamental topics that have been investigated in our research group for years. We have developed two- and three-dimensional (3D) adaptive phase field simulation for dendritic crystal growth and directional solidification. The modeling of crystal growth in a confined space, which is particularly important in cryo-biotechnology and composite casting, and the visualization of morphological instability will be carried out. In addition, using accelerated crucible rotation and angular vibration to control the flow and solute transport during crystal growth has been found effective. Both interface visualization and computer simulation will be carried out for the transparent system using succinonitrile. Further validation will be done through high-temperature growth of silicon- or gallium-doped germanium single crystals. The item 3 is proposed to recycle the kerf-loss silicon. The high-gravity physical pretreatment of the slurry waste will be considered before the high-temperature refining. The refined silicon is grown by directional solidification and the ingot sliced for solar cell fabrication. The removal of key impurities that affect the lifetime of minority carriers　and the control of electrically inactive grain boundaries during solidification will be explored. The success of the project should be useful for photovoltaic industry. The final item is to use our patented process, the zone-leveling Czochralski method, to grow near stoichiometric lithium titanate (SLT) and the substrate crystals for laser and light-emitting diode (LED) applications. The advance of these research topics should put our crystal growth laboratory a leading position in the international crystal growth community.晶體生長模擬矽泥回收Crystal GrowthModelingSilicon Recycl