Wang Pengchao, Dong Bohua, Cui Zhenjie, Gao Rongjie, Su Ge, Wang Wei, Cao Lixin
School of Materials Science and Engineering, Ocean University of China 238 Songling Road Qingdao 266100 P. R. China
RSC Adv. 2018 Jan 9;8(4):1940-1947. doi: 10.1039/c7ra13306e. eCollection 2018 Jan 5.
Metal-halide perovskite nanocrystals (NCs) are considered to be promising types of optoelectronic and photonic materials. The emission colors of the cesium lead halide perovskite (CsPbX, X = Cl, Br, I) NCs depend on the joint influence of the emission peaks of the host and its dopant ions. Herein, we report a phosphine-free strategy to synthesize Mn-doped CsPb(Cl/Br) NCs to tune their optical properties in a wide color gamut. Colloidal Mn-doped CsPb(Cl/Br) NCs were synthesized by injecting Cs-oleate solution into the MnCl and PbBr precursor solution. The as-prepared Mn-doped CsPb(Cl/Br) NCs are highly crystalline and uniform sized nanocubes with two emission peaks, including the host emission around 450 nm and the Mn dopant emission around 600 nm, which are sensitive to the MnCl-to-PbBr molar feed ratio and the reaction temperature. By varying the MnCl-to-PbBr molar feed ratio or the reaction temperature, the relative PL intensities of dual color emission can be manipulated, showing their ability in tunable color output.
金属卤化物钙钛矿纳米晶体(NCs)被认为是有前景的光电子和光子材料类型。铯铅卤化物钙钛矿(CsPbX,X = Cl、Br、I)纳米晶体的发射颜色取决于主体及其掺杂离子发射峰的共同影响。在此,我们报告一种无膦策略来合成锰掺杂的CsPb(Cl/Br)纳米晶体,以在宽色域内调节其光学性质。通过将油酸铯溶液注入氯化锰和溴化铅前驱体溶液中合成了胶体状的锰掺杂CsPb(Cl/Br)纳米晶体。所制备的锰掺杂CsPb(Cl/Br)纳米晶体是高度结晶且尺寸均匀的纳米立方体,具有两个发射峰,包括约450 nm处的主体发射和约600 nm处的锰掺杂剂发射,这两个发射峰对氯化锰与溴化铅的摩尔进料比以及反应温度敏感。通过改变氯化锰与溴化铅的摩尔进料比或反应温度,可以操纵双色发射的相对PL强度,显示出它们在可调颜色输出方面的能力。