三苯胺
表面改性
材料科学
离域电子
量子点
共轭体系
共价键
光伏
光致发光
纳米技术
带隙
硅
光电子学
激子
光化学
化学
光伏系统
聚合物
有机化学
物理
复合材料
物理化学
生物
量子力学
生态学
作者
Tianlei Zhou,Ryan T. Anderson,Huashan Li,Jacob P. Bell,Yongan Yang,Brian Gorman,Svitlana Pylypenko,Mark T. Lusk,Alan Sellinger
出处
期刊:Nano Letters
[American Chemical Society]
日期:2015-05-18
卷期号:15 (6): 3657-3663
被引量:64
摘要
The quantum confinement and enhanced optical properties of silicon quantum dots (SiQDs) make them attractive as an inexpensive and nontoxic material for a variety of applications such as light emitting technologies (lighting, displays, sensors) and photovoltaics. However, experimental demonstration of these properties and practical application into optoelectronic devices have been limited as SiQDs are generally passivated with covalently bound insulating alkyl chains that limit charge transport. In this work, we show that strategically designed triphenylamine-based surface ligands covalently bonded to the SiQD surface using conjugated vinyl connectivity results in a 70 nm red-shifted photoluminescence relative to their decyl-capped control counterparts. This suggests that electron density from the SiQD is delocalized into the surface ligands to effectively create a larger hybrid QD with possible macroscopic charge transport properties.
科研通智能强力驱动
Strongly Powered by AbleSci AI