期刊
PHYSICS LETTERS A
卷 380, 期 18-19, 页码 1658-1662出版社
ELSEVIER
DOI: 10.1016/j.physleta.2016.02.043
关键词
Diphenylalanine; Self-assembly; Photoluminescence; Exciton
资金
- Russian Scientific Foundation [14-12-00812]
- FCT/MEC [FCT UID/CTM/50011/2013]
- FEDER
- Russian Science Foundation [14-12-00812] Funding Source: Russian Science Foundation
Bioinspired self-assembled structures are increasingly important for a variety of applications ranging from drug delivery to electronic and energy harvesting devices. An important class of these structures is diphenylalanine microtubes which are potentially important for optical applications including light emitting diodes and optical biomarkers. In this work we present the data on their photoluminescent properties at low temperatures (down to 12 K) and discuss the origin of the emission in the near ultraviolet (UV) range seen earlier in a number of reports. UV luminescence increases with decreasing temperature and exhibits several equidistant lines that are assigned to zero-phonon exciton emission line and its phonon replicas. We infer that the exciton is localized on the defect sites and significant luminescence decay is due to thermal quenching arising from the carrier excitation from these defects and non-radiative recombination. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据