英语翻译原文：To get a real understanding on the complexity of orig

英语翻译
原文：To get a real understanding on the complexity of origin and mechanism of visible emission for ZnO quantum
dots (QDs),we systematically property of visible emission of ZnO QDs with tunable diameters in a range of
2.2-7.8 nm synthesized via a sol-gel route using self-made zinc-oleate complex as a precursor.It is indicated
that the visible emission of ZnO QDs can be ascribed to singly ionized oxygen vacancies,which is associated
with the paramagnetic centers with electron paramagnetic resonance (EPR) value of g ) 2.0056.The visible
emission property of the ZnO QDs displays highly size-dependent behavior.With ZnO QDs size decreasing,
the visible emission peaks blue-shift to the positions with shorter wavelength due to quantum size effect,
however,is different from that of band gap.Quantitative investigation shows that the visible emission can
correspond to a transition of holes from the valence band to the preexisting deep donor energy level,which
is different from the well-known conclusion that the visible emission is due to the transition of an electron
from the conduction band to a deep trap.Two important points can be obtained:the defects of singly ionized
oxygen vacancies determine the origin and intensity of visible emission of ZnO QDs; and the visible emission
peak position of ZnO QDs is decided by their size,and a transition of holes from the valence band to the
preexisting deep donor energy level is responsible for the visible emission of the ZnO QDs.
译文：为了得到关于氧化锌量子点可见发射机制和起源的复杂性的合理解释,我们以自制的锌油酸为前驱物通过溶胶凝胶法合成氧化锌系统地将其量子点的可见发射直径控制在2.2-7.8纳米.这是表明氧化锌量子点的可见发机制可简单的归因于氧空位的电离,这与顺磁中心的ERPg=2.0056有关.可见氧化锌量子点的可见发射能力具有显著的尺寸依赖性.随着氧化锌量子点尺寸的减小,由于量子尺寸效应可见发射峰的蓝移向波长更短的方向移动,然而它又与带隙不同.定量研究表明,可见发射能对应于空洞从价带过渡到先前的更深的能级,这与可见发射是由于电子从传导带跃迁到更深的能级这一著名理论不同.这重要的两点表明：简单氧离子空位决定了氧化锌量子点发射可见光的原因和其强度；此外,氧化锌量子点可见发射的强度也取决于起尺寸的大小；另外,空洞从价带过渡到先前的更深的能级对氧化锌的可见发射也有作用.