文献类型：期刊文献

英文题名：Fractional Contributions of Defect-Originated Photoluminescence from CuInS2/ZnS Coreshells for Hybrid White LEDs

作者：Rice, Quinton[1];Raut, Sangram[2,3];Chib, Rahul[2];Gryczynski, Zygmunt[2,3];Gryczynski, Ignacy[2];Zhang, Wenjin[4];Zhong, Xinhua[4];Abdel-Fattah, Mahmoud[1];Tabibi, Bagher[1];Seo, Jaetae[1]

机构：[1]Hampton Univ, Adv Ctr Laser Sci & Spect, Dept Phys, Hampton, VA 23668 USA;[2]Univ N Texas, Hlth Sci Ctr, Ctr Fluorescence Technol & Nanomed, Dept Cell Biol & Immunol, Ft Worth, TX 76107 USA;[3]Texas Christian Univ, Dept Phys & Astron, Ft Worth, TX 76129 USA;[4]E China Univ Sci & Technol, Dept Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2014

卷号：2014

外文期刊名：JOURNAL OF NANOMATERIALS

收录：;EI(收录号：20144800240032);WOS:【SCI-EXPANDED(收录号:WOS:000345018300001)】；

基金：The work at HU was supported by the NSF HRD-1137747 and ARO W911NF-11-1-0177.

语种：英文

外文关键词：Defect states - Interface states - Light emitting diodes - Time-resolved spectroscopy - Quenching

摘要：The wide optical tunability and broad spectral distribution of CuInS2/ZnS (CIS/ZnS) coreshells are key elements for developing the hybrid white light emitting diodes where the nanoparticles are stacked on the blue LEDs. Two CIS/ZnS555 (nm) and CIS/ZnS665 (nm) coreshells are utilized for the hybrid white LED development. The time-resolved spectroscopy of CIS/ZnS555 (nm) and CIS/ZnS665 (nm) reveals the correlation between the fast, intermediate, and slow decay components and the interface-trapped state and shallow- and deep-trapped states, although the fractional amplitudes of photoluminescence (PL) decay components are widely distributed throughout the entire spectra. The temperature-resolved spectroscopy explains that the PL from deep-trapped donor-acceptor (DA) state has relatively large thermal quenching, due to the relative Coulomb interaction of DA pairs, compared to the thermal quenching of PL from interface defect state and shallow-trapped DA state. A good spectral coupling between the blue diode excitation and the PL from CIS/ZnS leads to the realization of hybrid white LEDs.