Institute for Organic Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, 55128, Mainz, Germany.
ACS Nano. 2009 May 26;3(5):1063-8. doi: 10.1021/nn800790s.
To combine the optical properties of CdSe@ZnS quantum dots (QDs) with the electrical properties of semiconducting polymers, we prepared QD/polymer hybrids by grafting a block copolymer (BCP) containing thiol-anchoring moieties (poly(para-methyl triphenylamine-b-cysteamine acrylamide)) onto the surfaces of QDs through the ligand exchange procedure. The prepared QD/polymer hybrids possess improved processability such as enhanced solubility in various organic solvents as well as the film formation properties along with the improved colloidal stability derived from the grafted polymer shells. We also demonstrated light-emitting diodes based on QD/polymer hybrids, exhibiting the improved device performance (i.e., 3-fold increase in the external quantum efficiency) compared with the devices prepared by pristine (unmodified) QDs.
为了结合 CdSe@ZnS 量子点 (QD) 的光学性质和半导体聚合物的电学性质，我们通过配体交换程序，将含有巯基锚固基团的嵌段共聚物（聚（对甲基三苯胺-b-半胱氨酸丙烯酰胺））接枝到 QD 表面上，制备了 QD/聚合物杂化物。所制备的 QD/聚合物杂化物具有改善的加工性能，例如在各种有机溶剂中增强的溶解性以及改善的成膜性能，以及源自接枝聚合物壳的改善的胶体稳定性。我们还展示了基于 QD/聚合物杂化物的发光二极管，与由原始（未修饰）QD 制备的器件相比，表现出改善的器件性能（即外量子效率提高了 3 倍）。
