Glass stabilized ultra-stable dual-emitting Mn-doped cesium lead halide perovskite quantum dots for cryogenic temperature sensing
Glass stabilized ultra-stable dual-emitting Mn-doped cesium lead halide perovskite quantum dots for cryogenic temperature sensing
复制标题
用于低温温度传感的玻璃稳定超稳定双发射锰掺杂铯铅卤化物钙钛矿量子点
DOI：
10.1039/c9nr05831a
复制
发表时间：
2019
期刊：
影响因子：
6.7
通讯作者：
Chen Daqin
中科院分区：
文献类型：
--
作者：
Zhuang Bin;Liu Yue;Yuan Shuo;Huang Hai;Chen Jiangkun;Chen Daqin
mn掺杂CsPb(Cl/Br)3量子点具有多功能的光学、电子和磁特性。然而，它们通常会在空气中分解，并且由于Pb2+和Mn2+之间的半径不匹配，Mn2+掺杂剂会逐渐从钙钛矿宿主中排出。为了解决这些关键问题，本文报道了通过适当的玻璃成分设计和原位玻璃结晶来合成玻璃稳定的mn掺杂量子点。Mn2+掺杂剂作为成核剂，在B-P-Zn-Cs-Pb基氧化卤化物玻璃中促进CsPb(Cl/Br)3的成核/生长，并通过激子到掺杂剂的有效能量转移进入钙钛矿基体中，产生双色发光。受益于坚固玻璃的有效保护，mn掺杂CsPb(Cl/Br)3量子点表现出优异的耐水性和热稳定性。特别是，在水中浸泡30天后，几乎100%的发光仍然保留。有趣的是，在低温下，相对于Mn2+ d-d跃迁，激子重组的快速热猝灭使其作为比例温度传感介质具有广阔的应用前景。
Mn-Doped CsPb(Cl/Br)3 quantum dots possess multi-functional optical, electronic and magnetic characteristics. However, they usually suffer from decomposition in air, and Mn2+ dopants will be gradually expelled from the perovskite host due to a radius mismatch between Pb2+ and Mn2+. To solve these crucial issues, the synthesis of glass stabilized Mn-doped quantum dots via an appropriate glass composition design and in situ glass crystallization is reported. Mn2+ dopants act as nucleating agents to promote the nucleation/growth of CsPb(Cl/Br)3 from B–P–Zn–Cs–Pb based oxyhalide glass and partition into the perovskite host to produce dual-color luminescence via efficient exciton-to-dopant energy transfer. Benefitting from the effective protection of robust glass, Mn-doped CsPb(Cl/Br)3 quantum dots exhibit superior water resistance and thermal stability. Particularly, almost 100% luminescence is retained after immersing the composite in water for 30 days. Interestingly, rapid thermal quenching for exciton recombination relative to Mn2+ d–d transition at cryogenic temperatures enables its promising applications as a ratiometric temperature sensing medium.