摘要
通过锰掺杂,可以调节钙钛矿的发光波长,提高其发光量子产率。在二维钙钛矿(PMA)_(2)PbBr_(4)中引入Mn^(2+)掺杂,研究了(PMA)_(2)PbBr_(4)中Mn^(2+)掺杂的发光性质以及能量转移机制。研究表明,锰掺杂后,原来二维钙钛矿的激子复合发光峰(419 nm)变成了Mn^(2+)轨道^(4)T_(1)→^(6)A_(1)之间的跃迁发光(608 nm),其中发生了有效的能量转移。Mn^(2+)的引入导致晶格一定程度的畸变,进而激子寿命显著降低(从6.51 ns到0.30 ns);同时,由Mn^(2+)带来的发光寿命却对掺杂浓度并不敏感(0.23 ms),这源于此时发光对应于Mn^(2+)对应于4 T1→6 A1之间的跃迁。Mn^(2+)掺杂后,其光稳定性有了明显改善。因此,锰掺杂对于调节二维钙钛矿的发光波长或带宽,提高发光效率是一个有效手段,为二维钙钛矿在白光照明方面的应用提供可能性。
Through manganese doping,the luminescence wavelength of perovskite can be adjusted to improve its quantum yield.In this paper,Mn^(2+)doping was lead into two-dimensional perovskite(PMA)_(2)PbBr_(4) and the luminescence properties and energy transfer mechanism in Mn-doped twodimensional perovskite(PMA)_(2)PbBr_(4) were studied.The results show that after manganese doping,the exciton recombination luminescence peak(419 nm)of the original two-dimensional perovskite changed into a transition(608 nm)between the Mn^(2+)orbital ^(4)T_(1)→^(6)A_(1),in which an effective energy transfer occurred.The introduction of Mn^(2+)leads to a certain degree of lattice distortion,and then the exciton lifetime decreases(from 6.51 ns to 0.30 ns);at the same time,the luminescence lifetime brought by Mn^(2+)is not sensitive to the doping concentration(0.23 ms),because the luminescence corresponds to the transition between ^(4)T_(1) and ^(6)A_(1) of Mn^(2+)at this time.After manganese doping,its optical stability has alsObeen significantly improved.Therefore,manganese doping is an effective means to adjust the wavelength or bandwidth of two-dimensional perovskite and improve the luminous efficiency,which provides the possibility for the application of two-dimensional perovskite in white light lighting.
作者
王梓屹
徐公杰
WANG Ziyi;XU Gongjie(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《光学仪器》
2024年第2期86-94,共9页
Optical Instruments
关键词
二维钙钛矿
锰掺杂
发光机制
能量转移机制
two-dimensional perovskite
manganese doping
luminous mechanism
energy transfer mechanism
