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Multicolor Output from 2D Hybrid Perovskites with Wide Band Gap: Highly Efficient White Emission, Dual-Color Afterglow, and Switch between Fluorescence and Phosphorescence
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2021-01-20 , DOI: 10.1021/acs.jpclett.0c03538 Qiuqin Huang 1 , Shuming Yang 1 , Shangwei Feng 2 , Hongyu Zhen 1 , Zhenghuan Lin 1 , Qidan Ling 2
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2021-01-20 , DOI: 10.1021/acs.jpclett.0c03538 Qiuqin Huang 1 , Shuming Yang 1 , Shangwei Feng 2 , Hongyu Zhen 1 , Zhenghuan Lin 1 , Qidan Ling 2
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Herein, an organic fluorophore termed NLAC is introduced into 2D hybrid perovskites with wide band gap (>3.54 eV) to give a green emission with quantum yield up to 81%. The highly efficient luminescence is ascribed to avoiding the aggregation of NLAC and formation of an inorganic free exciton which is easy to thermally quench. On this basis, a new strategy to generate efficient white emission with afterglow has been proposed by codoping a short-wavelength fluorophore and long-wavelength phosphor into 2D organic–inorganic hybrid perovskites (OIHPs). As a result, a single-component white-light-emitting material PEPC-3N based on NLAC with CIE of (0.33, 0.36) and quantum yield up to 43% can be obtained. Interestingly, PEPC-3N shows a dual-color organic afterglow and excitation-wavelength-dependent emission, consequently forming a switch between green fluorescence and yellow afterglow. This unique performance indicates PEPC-3N has huge potential in afterglow WLEDs and information storage.
中文翻译：
具有宽带隙的2D混合钙钛矿的多色输出：高效白光发射，双色余辉以及在荧光和磷光之间切换
在本文中，将称为NLAC的有机荧光团引入具有宽带隙（> 3.54 eV）的2D杂化钙钛矿中，产生绿色发射，量子产率高达81％。高效发光归因于避免NLAC的聚集和易于加热淬灭的无机游离激子的形成。在此基础上，通过将短波长荧光团和长波长磷光体共掺入二维有机-无机杂化钙钛矿（OIHP）中，提出了一种产生余辉的有效白光发射的新策略。结果，可获得基于CIE为（0.33，0.36）且量子产率高达43％的基于NLAC的单组分白光发光材料PEPC-3N。有趣的是，PEPC-3N呈现出双色有机余辉和与激发波长有关的发射，因此在绿色荧光和黄色余辉之间形成转换。这种独特的性能表明PEPC-3N在余辉WLED和信息存储方面具有巨大潜力。
更新日期：2021-01-28
中文翻译：
具有宽带隙的2D混合钙钛矿的多色输出：高效白光发射，双色余辉以及在荧光和磷光之间切换
在本文中，将称为NLAC的有机荧光团引入具有宽带隙（> 3.54 eV）的2D杂化钙钛矿中，产生绿色发射，量子产率高达81％。高效发光归因于避免NLAC的聚集和易于加热淬灭的无机游离激子的形成。在此基础上，通过将短波长荧光团和长波长磷光体共掺入二维有机-无机杂化钙钛矿（OIHP）中，提出了一种产生余辉的有效白光发射的新策略。结果，可获得基于CIE为（0.33，0.36）且量子产率高达43％的基于NLAC的单组分白光发光材料PEPC-3N。有趣的是，PEPC-3N呈现出双色有机余辉和与激发波长有关的发射，因此在绿色荧光和黄色余辉之间形成转换。这种独特的性能表明PEPC-3N在余辉WLED和信息存储方面具有巨大潜力。
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