White light emission in Bi3+/Mn2+ ion co-doped CsPbCl3 perovskite nanocrystals†,Nanoscale

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White light emission in Bi3+/Mn2+ ion co-doped CsPbCl3 perovskite nanocrystals†
Nanoscale ( IF 5.8 ) Pub Date : 2017-12-21 00:00:00 , DOI: 10.1039/c7nr08136g
He Shao _{1,

2,

3,

4,

5} , Xue Bai _{1,

2,

3,

4,

5} , Haining Cui _{3,

4,

5,

6} , Gencai Pan _{1,

2,

3,

4,

5} , Pengtao Jing _{7,

8,

9,

10,

11} , Songnan Qu _{7,

8,

9,

10,

11} , Jinyang Zhu _{3,

4,

5,

6} , Yue Zhai _{1,

2,

3,

4,

5} , Biao Dong _{1,

2,

3,

4,

5} , Hongwei Song _{1,

2,

3,

4,

5}

Affiliation

Colloidal perovskite nanocrystals (NCs), especially the fully inorganic cesium lead halide (CsPbX₃, X = Cl, Br, I) NCs, have been considered as promising candidates for lighting and display applications due to their narrow band emission, tunable band gap and high photoluminescence quantum yields (QYs). However, owing to the anion exchange in the CsPbX₃ NCs, stable multi-color and white light emissions are difficult to achieve, thus limiting their practical optoelectronic applications. In this work, dual ion Bi³⁺/Mn²⁺ codoped CsPbCl₃ perovskite NCs were prepared through the hot injection method for the first time to the best of our knowledge. Through simply adjusting the doping ion concentrations, the codoped NCs exhibited tunable emissions spanning the wide range of correlated color temperature (CCT) from 19 000 K to 4250 K under UV excitation. This interesting spectroscopic behaviour benefits from efficient energy transfer from the perovskite NC host to the intrinsic energy levels of Bi³⁺ or Mn²⁺ doping ions. Finally, taking advantage of the cooperation between the excitonic transition of the CsPbCl₃ perovskite NC host and the intrinsic emissions from Bi³⁺ and Mn²⁺ ions, white light emission with the Commission Internationale de l'Eclairage (CIE) color coordinates of (0.33, 0.29) was developed in the codoped CsPbCl₃ NCs.

中文翻译：

Bi ³⁺ / Mn ²⁺离子共掺杂的CsPbCl ₃钙钛矿纳米晶体的白光发射†

胶态钙钛矿纳米晶体（NCs），尤其是完全无机的卤化铯铯（CsPbX ₃，X = Cl，Br，I）NCs，由于其窄带发射，可调带隙和高的光致发光量子产率（QYs）。但是，由于CsPbX ₃ NC中的阴离子交换，难以实现稳定的多色和白光发射，因此限制了其实际的光电应用。在这项工作中，双离子Bi ³⁺ / Mn ²⁺共掺杂CsPbCl ₃据我们所知，钙钛矿型NC首次通过热注射方法制备。通过简单地调整掺杂离子浓度，在紫外线激发下，共掺杂的NC呈现出可调谐的发射光，其色温范围从19000 K到4250K。这种有趣的光谱行为得益于钙钛矿NC主体到Bi ³⁺或Mn ²⁺掺杂离子的本征能级的有效能量转移。最后，利用CsPbCl ₃钙钛矿NC主体的激子跃迁与Bi ³⁺和Mn ²⁺的固有发射之间的合作离子，在共掺杂的CsPbCl ₃ NC中开发了具有国际照明委员会（CIE）颜色坐标为（0.33，0.29）的白光。

更新日期：2017-12-21

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