Material Dimensionality Effects on Electron Transfer Rates Between CsPbBr3 and CdSe Nanoparticles,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Material Dimensionality Effects on Electron Transfer Rates Between CsPbBr3 and CdSe Nanoparticles
Nano Letters ( IF 9.6 ) Pub Date : 2018-06-26 00:00:00 , DOI: 10.1021/acs.nanolett.8b01238
Alexandra Brumberg ₁ , Benjamin T. Diroll ₂ , Georgian Nedelcu _{3,

4} , Matthew E. Sykes ₂ , Yuzi Liu ₂ , Samantha M. Harvey ₁ , Michael R. Wasielewski ₁ , Maksym V. Kovalenko _{3,

4} , Richard D. Schaller _{1,

2}

Affiliation

Films containing mixtures of zero- or two-dimensional nanostructures (quantum dots or nanoplatelets) were prepared in order to investigate the impacts of dimensionality on electronic interactions. Electron transfer from CsPbBr₃ to CdSe was observed in all of the mixtures, regardless of particle dimensionality, and characterized via both static and transient absorption and photoluminescence spectroscopies. We find that mixtures containing nanoplatelets as the electron acceptor (CdSe) undergo charge transfer more rapidly than those containing quantum dots. We believe the faster charge transfer observed with nanoplatelets may arise from the extended spatial area of the CdSe nanoplatelets and/or the continuous density of acceptor states that are present in nanoplatelets. These results bolster the use of one- or two-dimensional nanomaterials in the place of zero-dimensional quantum dots in the design of related optoelectronic devices such as solar cells, light-emitting diodes, and photocatalysts and further offer the prospect of fewer required hopping events to transport carriers due to the larger spatial extent of the particles.

中文翻译：

材料尺寸对CsPbBr ₃和CdSe纳米粒子之间电子转移速率的影响

为了研究维数对电子相互作用的影响，制备了包含零维或二维纳米结构（量子点或纳米片）混合物的薄膜。CsPbBr _3的电子转移无论颗粒尺寸如何，在所有混合物中均观察到CdSe的CdSe含量，并通过静态和瞬态吸收以及光致发光光谱学对其进行表征。我们发现包含纳米片作为电子受体（CdSe）的混合物比包含量子点的混合物更快地进行电荷转移。我们相信，用纳米血小板观察到的更快的电荷转移可能源于CdSe纳米血小板的扩展空间区域和/或纳米血小板中存在的受体状态的连续密度。这些结果有助于在相关光电子器件（例如太阳能电池，发光二极管，

更新日期：2018-06-26

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11