Direct Electrodeposition of Crystalline Groups IV and III-V Semiconductors by Electrochemical Liquid-Liquid-Solid Growth

通过电化学液-液-固生长直接电沉积 IV 族和 III-V 族晶体半导体

基本信息

批准号：
1505635
负责人：
Stephen Maldonado
金额：
$ 44.79万
依托单位：
Regents of the University of Michigan - Ann Arbor
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-06-15 至 2019-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1505635&HistoricalAwards=false
关键词：
Direct Electrodeposition Crystalline Groups IV

项目摘要

With the support from the Macromolecular, Supramolecular and Nanochemistry Program of the Division of Chemistry and the Solid State and Materials Research Program of the Division of Materials Research, Prof. Stephen Maldonado of the University of Michigan aims to develop a novel, low-energy method for the preparation of technologically important crystalline semiconducting materials. Semiconductors are important materials for the fabrication of batteries, solar cells, and ultrafast microelectronics. Currently, energy-intensive methods are required for preparing high quality covalent semiconductors. This project provides to graduate and undergraduate students research training in electrochemistry, materials science, and advanced electron microscopic methods relevant to the fields of energy conversion/storage and microelectronics. In addition to disseminating research results in the form of publications and presentations at national conferences, Prof. Maldonado aimes to develop a new laboratory exercise on making semiconductor devices to introduce electrochemistry in the undergraduate curriculum.This research explores the use of electrochemical liquid-liquid-solid (ec-LLS) deposition as a synthetic and low-energy crystal growth method of semiconductors. The appeal of ec-LLS method is that it is a one-pot approach in which liquid metals are used simultaneously as sources of electrons for the reduction of semiconductor feedstock and as media for growing semiconductor crystals even at low temperatures. There are three main thrusts in this project. The first thrust aims to identify strategies and ec-LLS deposition parameters that effect desirable properties in Group IV (Ge, Si) macroscale crystals and micro/nanowires. This knowledge is essential for the predictive control of the morphological, crystallographic, and electronic properties of crystalline covalent semiconductors prepared through ec-LLS method. The second thrust involves ex-situ and in-situ (e.g. within optical and transmission electron microscopes) analyses to follow the nucleation and crystal growth steps in ec-LLS directly and in real time. The correlation between the current-time data and the specific nucleation and crystal growth steps provides real time feedback on the effects of various physicochemical and electrochemical factors on the crystals formed from ec-LLS. The third thrust focuses on understanding and controlling ec-LLS processes for tailored III-V (GaAs, InAs, GaSb, InSb) nanoparticles and nanowires.

密歇根大学Stephen Maldonado教授在化学部高分子、超分子和纳米化学项目以及材料研究部固体与材料研究项目的支持下，旨在开发一种新颖的低能耗方法用于制备技术上重要的晶体半导体材料。半导体是制造电池、太阳能电池和超快微电子器件的重要材料。目前，制备高质量共价半导体需要能源密集型方法。该项目为研究生和本科生提供电化学、材料科学以及与能量转换/存储和微电子领域相关的先进电子显微方法的研究培训。除了以出版物和在国家会议上演讲的形式传播研究成果外，马尔多纳多教授还旨在开发一种新的制造半导体器件的实验室练习，以在本科课程中引入电化学。这项研究探索了电化学液-液-电化学的使用。固体（ec-LLS）沉积作为半导体的合成和低能量晶体生长方法。 ec-LLS 方法的吸引力在于它是一种一锅法，其中液态金属同时用作还原半导体原料的电子源和即使在低温下也用作生长半导体晶体的介质。该项目有三个主要目标。第一个重点旨在确定影响 IV 族（Ge、Si）宏观晶体和微/纳米线所需性能的策略和 ec-LLS 沉积参数。这些知识对于通过 ec-LLS 方法制备的晶体共价半导体的形态、晶体学和电子特性的预测控制至关重要。第二个推动力涉及异位和原位（例如在光学和透射电子显微镜内）分析，以直接实时跟踪 ec-LLS 中的成核和晶体生长步骤。当前时间数据与特定成核和晶体生长步骤之间的相关性提供了各种物理化学和电化学因素对 ec-LLS 形成的晶体的影响的实时反馈。第三个重点是了解和控制定制 III-V（GaAs、InAs、GaSb、InSb）纳米颗粒和纳米线的 ec-LLS 工艺。