Although organic-inorganic hybrid MAPbBr₃ (CH₃NH₃⁺ = MA) perovskite nanocrystals (NCs) have outstanding optical properties, their toxicity and the low thermal stability seriously hinder the further application. Herein, the low-toxic MAPb_1-xMn_xBr₃ NCs were synthesized by the modified ligand-assisted re-precipitation (LARP) approach at room temperature. The mixed-metal NCs exhibit high PLQYs (more than 93%) due to a certain amount of Mn²⁺ doping effectively inhibits the non-radiative recombination, and thus improves the optical performance. The as-synthesized perovskite NCs also show excellent thermal stability because of the elimination of structural distortion by Mn²⁺-doping. The fast anion exchange of Mn²⁺-doped perovskite NCs effectively extends their photoluminescence to the whole visible spectral region. Interestingly, a novel dual-emission was observed in MAPb_1-xMn_x(I/Br)₃ (x = 0.3) perovskite NCs due to the phase separation.

尽管有机-无机杂化MAPbBr ₃ (CH ₃ NH ₃ ⁺  = MA)钙钛矿纳米晶体(NCs)具有出色的光学性能，但其毒性和低热稳定性严重阻碍了其进一步应用。在此，低毒 MAPb _{1- x} Mn _x Br ₃ NCs 是在室温下通过改进的配体辅助再沉淀 (LARP) 方法合成的。由于一定量的 Mn ²⁺，混合金属 NCs 表现出高 PLQYs（超过 93%）掺杂有效地抑制了非辐射复合，从而提高了光学性能。由于 Mn ²⁺掺杂消除了结构变形，因此合成的钙钛矿 NCs 也显示出优异的热稳定性。Mn ²⁺掺杂的钙钛矿NCs的快速阴离子交换有效地将它们的光致发光扩展到整个可见光谱区域。有趣的是， 由于相分离，在 MAPb _{1- x} Mn _x (I/Br) ₃ ( x = 0.3) 钙钛矿 NC中观察到了一种新的双发射。