Stoke shifted photoluminescence in Guanidinium lead halides for light emitting applications

Jeevaraj, M.; Ranjithkumar, R.; Devendran, P.; Nallamuthu, N.; Sudhahar, S.; Kumar, M. Krishna

doi:10.1016/j.cplett.2022.139693

Cited by 2 publications

(1 citation statement)

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“…Although guanidine is an ideal cation in LDMHs because of thermodynamic stability and excellent capabilities of hydrogen bonds, the reported PLQYs of guanidine-based MHs were low (less than 5%). − Table S1 summarizes the structures and applications of LDMHs with guanidine cation. Here, we report a family of 1D hybrid MHs TMGPbX 3 (TMG = 1,1,3,3-tetramethylguanidine, X = Cl – , Br – , or I – ) to systematically explore the influence of halogen on crystal structures and PL properties in 1D hybrid MHs.…”

Section: Introductionmentioning

confidence: 99%

White Light-Emitting Diodes Based on One-Dimensional Organic–Inorganic Hybrid Metal Chloride with Dual Emission

et al. 2022

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White-light emissive organic−inorganic hybrid metal halides (MHs) have shown promising potential applications in solid-state lighting. As one-dimensional (1D) MHs for white-light emission remain rare and the key role of halogen regulation in 1D hybrid MHs for broadband emission (BE) has not been well established yet, herein, we report a family of 1D hybrid MHs TMGPbX 3 (TMG = 1,1,3,3-tetramethylguanidine, X = Cl − , Br − , or I − ) to systematically explore the influence of halogen on crystal structures and photoluminescence (PL) properties in 1D organic−inorganic hybrid MHs. Under ultraviolet excitation, TMGPbBr 3 and TMGPbI 3 exhibit BE originating from self-trapped excitons (STEs), while TMGPbCl 3 manifests the special blue-white dual emission, which is contributed by STEs in inorganic frameworks and free excitons (FEs) in the organic component. Different emission mechanisms of three 1D MHs are well demonstrated and compared. With a PL quantum yield (PLQY) up to 11.67%, a white light-emitting diode (WLED) based on TMGPbCl 3 was fabricated to show its valuable application in solid-state lighting.

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Section: Introductionmentioning

confidence: 99%