红外技术2017，Vol.39Issue(2)：125-129,135,6.
红外PbX量子点光致发光特性研究
Research on Photoluminescence Characteristics of Infrared PbX Quantum Dots
摘要
Abstract
Photoluminescence of PbX quantum dots can be used in near infrared region by adjusting the wavelength via size effect.The photoluminescence (PL) characteristics detection and assessment for quantum dots are quite important in designing device,developing systems and improving utilization of PL energy in applications.In this paper,the absorption and PL spectra for PbX quantum dots of different size are analyzed in near infrared region.The PL spectrum for a PbX quantum dots film is also detected.The comparison of PL spectra shows that red shift occurs when the quantum dots are made into film and the full width at half maximum also increases.A method for detecting the PL power distribution of quantum dots and estimating the efficiency is presented and used to analyze two PbX film samples.The experimental results show that the PL power of the quantum dots film varies with the relative position of the detector,which may reveal the distribution of the PbX quantum dots in the film.The PL conversion efficiency within near infrared region for the two film samples are 2.51％ and 2.06％ respectively,which is suitable for engineering applications.关键词
量子点/PbX/光致发光/转换效率/光谱Key words
quantum dots/PbX/photoluminescence/conversion efficiency/optical spectrum分类
信息技术与安全科学引用本文复制引用
耿蕊,张玉江,陈青山..红外PbX量子点光致发光特性研究[J].红外技术,2017,39(2):125-129,135,6.
