“微距升华”晶体生长方法  

A Crystal Growth Method:Microspacing In-Air Sublimation

作　　者：叶欣 刘阳 陶绪堂[1] YE Xin;LIU Yang;TAO Xutang(Institute of Crystal Materials,State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China)

机构地区：[1]山东大学,晶体材料国家重点实验室,晶体材料研究所,济南250100

出　　处：《人工晶体学报》2021年第1期1-6,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51973106,21772115);山东省杰出青年基金(ZR2019JQ03);科技部国家重点研发项目(2016YFB1102201,2018YFB0406502)。

摘　　要：随着功能器件向微型化发展,微纳米尺度的低维晶体成为构建新一代功能器件的材料基础。传统的体块单晶生长方法不适用于低维晶体。长久以来,对新型低维材料的研究依赖于机械剥离、溶液法和化学/物理气相沉积等方法,这些方法在效率、可控性和适用性等方面存在诸多限制,因此发展高效可控的低维晶体新型生长方法成为实现这些低维材料器件实用化的前提。山东大学晶体材料国家重点实验室陶绪堂、刘阳团队基于多年来在分子材料结晶基础方面的研究成果,发明了新的“微距升华”低维晶体生长方法。“微距升华”法利用原料与生长衬底之间的微小间距,可以在常压下实现常规物理气相传输中需要高真空才能够达到的分子流传输模式,使生长过程不再受传质限制,因此微距升华法无须真空和载气,速度快,原料利用率接近100%。该方法适用于大部分的有机半导体、金属配合物,甚至含有大量羧基、羟基的药物分子及熔点在一定范围内的无机物晶体,生长的微纳米晶体与电子器件制程匹配,屡次创新器件迁移率记录。新方法受到业界广泛关注,已被多国科学家采用。Along with the newly emerging of functional materials such as organic semiconducting crystals and two-dimensional or layered crystals,traditional crystal growth methods for bulk crystals are no more applicable to them.And on the other hand,the invasive procedures like etching in the traditional top-down photolithography are harsh task for these new materials to survive while maintaining integrity to build miniaturized devices.Yang Liu,Xutang Tao,and their colleagues at State Key Laboratory of Crystal Materials,Shandong University have invented a microspacing in-air sublimation(MAS)growth method for such new materials.By creating a gap of a few hundred micrometers between the reservoir of material and the substrate on which the crystals will deposit,it was able to mimic the conditions used in traditional vacuum-based processes,but without any special equipment.The MAS growth is practicable for a wide range of organic and inorganic crystals;besides,it possesses advantages in many aspects such as short growth time,high materials utilization ratio,and applicability for real time observation,etc.Electrical devices based on the micro-crystals grown on the substrate exhibited higher performances than the best record ever reported.The method has aroused much attention in the related fields;and currently it has been adopted by many research groups all around the world.

关 键 词：微距升华法 晶体生长方法 有机晶体 无机晶体 微纳米晶体 

分 类 号：O78[理学—晶体学]