title: Synthesis of unstable colloidal inorganic nanocrystals through the introduction of a protecting ligand.
abstract: We demonstrate a facile and general strategy based on ligand protection for the synthesis of unstable colloidal nanocrystals by using the synthesis of pure p-type NiO nanocrystals as an example. We find that the introduction of lithium stearate, which is stable in the reaction system and capable of binding to the surface of NiO oxide nanocrystals, can effectively suppress the reactivity of NiO nanocrystals and thus prevent their in situ reduction into Ni. The resulting p-type NiO nanocrystals, a highly demanded hole-transporting and electron-blocking material, are applied to the fabrication of organic solar cells and polymer light-emitting diodes, demonstrating their great potential as an interfacial layer for low-cost and large-area, solution-processed optoelectronic devices.
authors.affiliation: State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, Department of Materials Science and Engineering and ‡Center for Chemistry of High-Performance and Novel Materials, Zhejiang University , Hangzhou 310027, People's Republic of China.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Liang
authors.forename: Qing
authors.initials: Q
authors.lastname: Yi
authors.forename: Sai
authors.initials: S
authors.lastname: Bai
authors.forename: Xingliang
authors.initials: X
authors.lastname: Dai
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Zhizhen
authors.initials: Z
authors.lastname: Ye
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.forename: Fengling
authors.initials: F
authors.lastname: Zhang
authors.forename: Baoquan
authors.initials: B
authors.lastname: Sun
authors.forename: Yizheng
authors.initials: Y
authors.lastname: Jin