Inorganic halogen ligands in quantum dots: I-, Br-, Cl- and film fabrication through electrophoretic deposition
Inorganic halogen ligands in quantum dots: I-, Br-, Cl- and film fabrication through electrophoretic deposition
复制标题
量子点中的无机卤素配体：I-、Br-、Cl- 和通过电泳沉积制备薄膜
DOI：
10.1039/c3cp52678j
复制
发表时间：
2013-01-01
影响因子：
3.3
通讯作者：
Qiu, Yong
中科院分区：
文献类型：
--
作者：
Niu, Guangda;Wang, Liduo;Qiu, Yong
将卤素离子（I-、Br-、Cl-）加入到CdSe和PbS量子点（QD）的胶体溶液中，形成这些无机配体封端的QD。卤素离子通过静电相互作用和不同的无机配体和量子点之间的配位强度连接到量子点导致不同程度的再分散和稳定在极性溶剂中。此外，我们成功地进行了电泳沉积（EPD）的量子点封端的无机配体。带负电荷的量子点被吸附到带正电荷的TiO 2阳极上。组装的量子点薄膜用于光伏器件，并提供比有机配体封端的量子点更好的效率。这项工作表明，卤素离子确实是很有前途的配体，以提高量子点的稳定性与无机配体和EPD方法显示在组装量子点薄膜的实际应用前景。
Halogen ions (I-, Br-, Cl- ) were added into a colloidal solution of CdSe and PbS quantum dots (QDs) to form QDs capped with these inorganic ligands. Halogen ions attached to QDs through electrostatic interactions and the varying coordination strength between the inorganic ligands and QDs led to different degrees of redispersion and stabilization in polar solvents. Moreover, we successfully conducted electrophoretic deposition (EPD) of QDs capped with inorganic ligands. Negatively charged QDs were adsorbed onto a positively charged TiO2 anode. The assembled QDs films were used in photovoltaic devices and offered better efficiency than QDs capped with organic ligands. This work demonstrates that halogen ions are indeed promising ligands to improve the stability of QDs with inorganic ligands and the EPD method shows prospects in assembling QDs films for practical applications.