Mn掺杂CsPbCl3/Cs4PbCl6复合材料的制备及发光机理

为开发适合产业化的零维钙钛矿的合成方法,利用超声法制备了Mn²⁺掺杂的CsPbCl₃/Cs₄PbCl₆复合物(CCM),并讨论了CCM的发光机理.在近紫外激发下,CCM具有明亮的红色发光,发射谱具有3个发射峰,分别位于606 nm(Mn²⁺)、414 nm(CsPbCl₃)和351 nm(Cs₄PbCl₆).CCM中存在CsPbCl₃、Cs₄PbCl₆对Mn²⁺的能量传递过程.通过改变前驱物中MnCl₂/PbCl₂投料比可以调节CCM中Cs₄PbCl₆对CsPbCl₃的钝化,调控CCM中CsPbCl₃对Mn²⁺的能量传递以及Mn²⁺的红光发射强度.

Synthesis and luminescence mechanism of Mn-doped CsPbCl3/Cs4PbCl6 composites

In order to develope synthesis methods suitable for industrial production. In this work, Mn-doped CsPbCl₃/Cs₄PbCl₆(CCM)composites were synthesized by ultrasonic method and their luminescence mechanism were investigated. CCM has a bright red emission under near-ultraviolet excitation, and there were three emission peaks located at 606 nm(Mn²⁺), 414 nm(CsPbCl₃), and 351 nm(Cs₄PbCl₆). Energy transfer from CsPbCl₃ to Mn²⁺ and from Cs₄PbCl₆ to Mn²⁺ were presented in CCM. By varying the MnCl₂/PbCl₂ ratio in the precursor, the passivation of Cs₄PbCl₆ on CsPbCl₃, the energy transfer from CsPbCl₃ to Mn²⁺ and the red-light emission intensity of Mn²⁺ were modulated.