title: A facile phosphine-free method for synthesizing PbSe nanocrystals with strong optical limiting effects.
abstract: PbSe semiconductor nanocrystals (NCs) have attracted ever-growing interest owing to both their fundamental physics and potential applications in a diverse range of fields such as optoelectronic devices and nonlinear optics. The current fabrication strategy for colloidal PbSe NCs, however, frequently involves acutely toxic reagents and tedious reaction procedures, and is plagued by products with poorly controlled size and morphology. Herein, we report a facile, low-cost, and phosphine-free method for synthesizing PbSe NCs, which provides highly uniform NCs with tunable mid-IR absorption, and they are promising for bio-related applications. These high quality NCs were obtained by the reaction of elemental Se and PbCl2 in oleylamine as both the ligand and reaction medium. The high flexibility and reproducibility of the method reported in this study allows us to synthesize monodispersed PbSe NCs with well-controlled size and morphology. In addition, these products show strong optical limiting effects, and thus hold potential for developing nonlinear optical devices.
authors: State Key Laboratory of Applied Organic Chemistry (SKLAOC), Lanzhou University, Lanzhou, P R China.
authors: Tian-Ming
authors: TM
authors: Wang
authors: Bao
authors: B
authors: Gao
authors: Qiang
authors: Q
authors: Wang
authors: Min
authors: M
authors: Zhao
authors: Kai-Bin
authors: KB
authors: Kang
authors: Zhu-Guo
authors: ZG
authors: Xu
authors: Hao-Li
authors: HL
authors: Zhang
mesh_terms: D007854:Lead / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D055096:Optical Devices; D055620:Optical Phenomena; D010316:Particle Size; D018036:Selenium Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D012666:Semiconductors; D013499:Surface Properties
chemical_list: D018036:Selenium Compounds; C088065:lead selenide; D007854:Lead