锰离子掺杂纯无机钙钛矿纳米晶及应用（英文）

Mn2+-doped CsPbX3（X= Cl,Br and I） perovskite nanocrystals and their applications

胶体锰离子掺杂的纯无机钙钛矿纳米晶由于其优异的光电性质,使其作为一种新兴的荧光发射材料,被研究者们广泛研究。不仅如此,纯无机钙钛矿纳米晶的锰离子掺杂行为也揭示了由于掺杂过程和掺杂剂本身引起的新的光学性质。通过不同的合成方法和选择不同的锰前驱体可以实现不同的掺杂行为,以及由此引发不同的荧光性质。在高带隙钙钛矿主体中进行锰离子掺杂时,其中激发能量由钙钛矿主体转移到掺杂锰离子位点的d态,进而产生橙黄色d-d发射荧光。研究者们一直致力于理解锰离子掺杂过程并由此设计高效掺杂的纳米晶。这些锰离子掺杂的钙钛矿纳米晶由于具有独特的电子和光学特性使其在发光二极管和太阳能电池等应用中发挥了巨大的作用。结合之前的相关工作和进展,本综述重点总结了锰离子掺杂的纯无机钙钛矿纳米晶的合成方法、发光来源、发光机理和潜在应用的最新进展,并提出了未来潜在合理的研究方向。

Colloidal Mn2+doped CsPbX3(X=Cl,Br,I)nanocrystals(NCs)are being explored extensively as alternative emitting materials,wherein highly efficient optical and optoelectronic processes can be achieved.Mn2+doping in perovskite NCs also reveals several new fundamental aspects of doping and new dopant-induced optical properties through different methods of synthesis.Mn2+doping exists in wide-band-gap perovskite hosts where the excitation energy is transferred to an Mn d-state,resulting in short-range tunable yelloworange d-d emissions.Enormous efforts have been expended on understanding the doping process and designing highly efficient doped NCs.The unique electronic and fluorescent properties endow these Mn2+doped perovskite NCs with various optoelectronic applications in light-emitting diodes(LEDs)and solar cells.Combining all these facts,this review focuses on the recent progress in synthesis methods,emission mechanism,and potential applications of Mn2+doped CsPbX3perovskite NCs and provides an outline for plausible future studies.