摘要
半导体纳米晶(又称为半导体量子点)由于其色纯度高和尺寸依赖的发光性能等优势,在照明和显示方面受到了科学界和产业界的广泛关注.目前,基于半导体量子点的电致发光器件所使用的发光材料以镉基硫族化合物量子点为主,然而镉元素对环境和人体都有一定的危害.因此,开发一种环境友好且光电性能良好的无镉半导体纳米晶是非常必要的.近年来,多元铜基硫族半导体纳米晶由于其毒性低、组分可调的发光特性及其在光电子器件领域的潜在应用受到了广泛关注.本文详细综述了多元铜基硫族半导体纳米晶的组分、表面配体、晶体结构和纳米结构等因素对其发光特性的影响,着重阐述了多元铜基硫族半导体纳米晶在电致发光器件中的研究进展,最后对多元铜基硫族半导体纳米晶的发展进行了展望.
In the past few decades,semiconductor nanocrystals(semiconductor quantum dots)have received widespread attention due to their high color purity and size-dependent optical properties as well as their potential applications in the next generation of lightening and displays.At present,most of the emitting layer materials in the quantum-dot electroluminescent devices are focused on cadmium-based chalcogenide quantum dots,but cadmium is harmful to the environment and human health,which faces great challenges in the future commercialization.Therefore,it is necessary to develop an environment-friendly,cadmium-free semiconductor quantum dot with excellent optoelectronic performance.In recent years,multinary copper chalcogenide semiconductor nanocrystals have attracted extensive attention due to their low toxicity,tunable luminescent properties and potential applications in optoelectronic devices.Ternary copper-based chalcogenide semiconductor nanocrystals(such as CuInS2,etc.)can be considered as the counterparts of the Ⅱ-Ⅵ compounds,in which the divalent metal ions(such as Zn^(2+),etc.)are replaced by monovalent copper ions(Cu^(+))and trivalent indium ions(In^(3+)).As a result,the crystal structure of ternary Ⅰ-Ⅲ-Ⅵ nanocrystals is similar to that of Ⅱ-Ⅵ nanocrystals.Up to date,ternary CuInS2 nanocrystals are the most widely studied among different multinary copper chalcogenide semiconductor nanocrystals.The crystal structure of ternary CuInS2 nanocrystals mainly includes sphalerite,wurtzite and chalcopyrite phase,and different-phase CuInS2 nanocrystals often have different optical band gaps.With the development of colloidal chemical synthetic technique,most of the multinary copper chalcogenide semiconductor nanocrystals can be synthesized through a colloidal chemical method.The reaction parameters including temperature,reaction precursor activity and surface ligand in the synthesis process play an important role in the tuning of the size,morphology and composition of the resultant nanocrystals.Generally,ter
作者
张京
王立瑾
陈斐
唐爱伟
滕枫
Jing Zhang;Lijin Wang;Fei Chen;Aiwei Tang;Feng Teng(Key Laboratory of Luminescence and Optical Information,Ministryof Education,School of Science,Beijing Jiaotong University,Beijing 100044,China)
出处
《科学通报》
EI
CAS
CSCD
北大核心
2021年第17期2162-2178,共17页
Chinese Science Bulletin
基金
国家自然科学基金(61735004,61974009)资助。
关键词
半导体纳米晶
多元铜基硫族化合物
发光性能
电致发光器件
semiconductor nanocrystals
multinary copper chalcogenides
luminescent properties
electroluminescent devices
