期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 672, 期 -, 页码 204-211出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.02.135
关键词
Cu4SnS4; Quantum confinement effect; Bohr radius; Solar cell
资金
- NSFC [51202108, U1332205, 11274153]
- Natural Science Foundation of Jiangsu Province [BK20131275]
We developed an improved hydrothermal method with water-oil two-phase reaction system to synthesize size-controllable and oil-soluble Cu4SnS4 (CTS) quantum dots (QDs). The water-oil interface played an important role in controlling nuclei process, growth speed, crystal size and size-distribution of CTS QDs. X-ray diffraction, Raman scattering and transmission electron microscopy studies suggested that the formation and growth mechanism of CTS QDs was revealed to involve three steps. The crystallographic orientation of the CTS nanoprism was analyzed in detail. The blue-shift of absorption edge and broadening of Raman bands were observed due to the quantum confinement effect. The exciton Bohr radius of CTS QDs was calculated to be 3.3-5.8 nm by using the first principle calculation. The size dependence of band-gaps of CTS QDs follows the particle-in-a-box effective-mass model. The ability to fabricate high-quality CTS QDs certainly facilitates the solar cell applications. (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