液固反应中CuAlO薄片的底物诱导各向异性生长

Substrate-Induced Anisotropic Growth of CuAlO Platelets in a Liquid-Solid Reaction.

作者信息

Shih Cheng-Hung, Chang Cheng-Chia, Wang Kuang-Kuo, Huang Hui-Chun, Chang Liuwen, Chou Mitch M C

机构信息

Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung80424, Taiwan, ROC.

Center for Crystal Researches, National Sun Yat-sen University, Kaohsiung80424, Taiwan, ROC.

出版信息

ACS Omega. 2023 Jan 30;8(5):4703-4710. doi: 10.1021/acsomega.2c06672. eCollection 2023 Feb 7.

DOI:10.1021/acsomega.2c06672

PMID:36777590

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9909797/

Abstract

This study reports a simplified method to grow CuAlO crystals of submillimeter sizes with a highly anisotropic shape of a platelet. The solid-state reaction of forming CuAlO at ca. 1373 K in the first stage of the conventional flux method is no longer required. The CuAlO platelets nucleated directly onto the (0001) surface in a melt of CuO saturated with AlO at 1473 K. The excess flux was mostly removed by the capped alumina plate on cooling with a limited amount of residue which can be leached afterward. The CuAlO platelets all have a 3R crystal structure with no line and planar defects observed by TEM. The CuAlO crystals emit a luminescence at 3.49 eV associated with resonant Raman effect resulted from a band-to-band transition in room-temperature PL measurement. The facile fabrication method for growing highly anisotropic CuAlO crystals paves the way for their practical application in photoelectrochemical devices.

摘要

本研究报告了一种简化方法，用于生长具有高度各向异性血小板形状的亚毫米尺寸的CuAlO晶体。不再需要在传统助熔剂法的第一阶段于约1373K下通过固态反应形成CuAlO。CuAlO血小板在1473K的AlO饱和CuO熔体中直接在(0001)表面成核。冷却时，过量的助熔剂大部分被加盖的氧化铝板除去，仅残留少量，随后可将其浸出。所有CuAlO血小板均具有3R晶体结构，通过透射电子显微镜未观察到线缺陷和面缺陷。在室温PL测量中，CuAlO晶体在3.49eV处发射与带间跃迁产生的共振拉曼效应相关的发光。生长高度各向异性CuAlO晶体的简便制造方法为其在光电器件中的实际应用铺平了道路。