Unveiling White Light Emission of a One-Dimensional Cu(I)-Based Organometallic Halide toward Single-Phase Light-Emitting Diode Applications

Abstract

Luminescent organometallic halide crystals, especially with single-component white emission, are urgently needed for light-emitting diode (LED) applications. Barriers for the applications, however, lie in their lead toxicity, poor stability, and low photoluminescence quantum yield (PLQY). Here, a one-dimensional Cu­(I)-based hybrid metal halide (C12H24O6)­CsCu2Br3 is designed and prepared via a simple solution method. Upon 365 nm excitation, a broad-band white light emission centered at 535 nm with a full width at half maximum of 186 nm and a PLQY of 78.3% is monitored. The experimental results together with calculation data indicate that the existence of the split peaks at 486 and 570 nm at a low temperature is attributed to the decrease of energy level degeneracy by virtue of the lattice distortion. Moreover, the stability along with the good device performance of the as-fabricated white LED was also discussed. The results demonstrate that (C12H24O6)­CsCu2Br3 is highly competitive in lighting application, and it can further enable breakthrough material design for new luminescent organometallic halides.

Microscopic Insights into the Mechanism of White Light Generation by Disruptive Interaction between Human Serum Albumin Amyloid Fibrils and Surfactant-AIEgen Nanorods

“…The generation of white light has been an area of active research, due to its potential applications in organic electronics and biophysical chemistry. − Its inherent mechanism is usually believed to involve a cascade energy transfer pathway in complex systems containing multiple emitting species; still, it is also possible that the observed white light is simply a sum of emissions in different spectral regions, from the components of the system. Of the various strategies for assembling multichromophoric systems for this purpose, surfactant-induced aggregation is convenient and reliable. − In recent times, this modality has been exploited to obtain aggregation-induced enhancement of emission (AIEE). − The study presented here explores the potential of one such aggregate in the design of novel white light-emitting platforms, in conjunction with protein amyloid fibrils. − The implications of amyloid fibrils in neurological diseases − prompted a frenzy of activity in the field of inhibition of aggregation and/or fibrillation. − More recently, however, more attention has been paid to the prospect of amyloid fibrils as functional biomaterials, , with potential applications in drug delivery, analyte sensing, and bioengineering and as templates for self-assembly .…”

Antimony -doped indium-based halide single crystals enabling white-light emission

“…In previous studies, the white light emission in hybrids mainly concentrated on optimizing polyhedral guests, involving the introduction of additional luminescent metals, 29,31,34,36 modulation of halogens, 37 defect-induced charge transfers 38 and other ways. 39 However, investigations on organic hosts still remain in their infancy. Recently, zerodimensional lead-free metal hybrids, such as In-based metal halides, involving (C 4 H 14 N 2 In 2 Br 10 ), 40 Cs 2 InBr 5 •H 2 O 11 and (PMA) 3 InBr 6 , have emerged as superior emitters.…”

Synthesis and optical properties of CsCu2Br3–Cu0 nanoheterojunctions

“…29 First-principles calculations revealed that the broadband emission of CsCu 2 X 3 originates from the self-trapped excitons in semiconductors with localized charge carriers. 30–32 It is worth noting that Cu NPs can successfully improve the optical performance through LSPR. 33…”

“…28 Recently, a series of non-toxic and highly stable Cu halides CsCu 2 X 3 (X = Cl, Br, I) were synthesized. [29][30][31][32] A representative example is the non-toxic CsCu 2 X 3 (X = Cl, Br, I) family that exhibits highly efficient emission properties with PLQY values of up to 48%, as well as improved thermal and air stability. 29 First-principles calculations revealed that the broadband emission of CsCu 2 X 3 originates from the self-trapped excitons in semiconductors with localized charge carriers.…”

“…29 First-principles calculations revealed that the broadband emission of CsCu 2 X 3 originates from the self-trapped excitons in semiconductors with localized charge carriers. [30][31][32] It is worth noting that Cu NPs can successfully improve the optical performance through LSPR. 33 In this work, we report CsCu 2 Br 3 -Cu 0 heterojunction nanorods (NRs) with blue-shifted dual emissions caused by the LSPR that is generated by Cu NPs attached to the CsCu 2 Br 3 -Cu 0 NRs.…”