Realizing Near-Unity Quantum Efficiency of Zero-Dimensional Antimony Halides through Metal Halide Structural Modulation

AbstractSolution-processed metal-halide perovskites are emerging as one of the most promising materials for displays, lighting and energy generation. Currently, the best-performing perovskite optoelectronic devices are based on lead halides and the lead toxicity severely restricts their practical applications. Moreover, efficient white electroluminescence from broadband-emission metal halides remains a challenge. Here we demonstrate efficient and bright lead-free LEDs based on cesium copper halides enabled by introducing an organic additive (Tween, polyethylene glycol sorbitan monooleate) into the precursor solutions. We find the additive can reduce the trap states, enhancing the photoluminescence quantum efficiency of the metal halide films, and increase the surface potential, facilitating the hole injection and transport in the LEDs. Consequently, we achieve warm-white LEDs reaching an external quantum efficiency of 3.1% and a luminance of 1570 cd m−2 at a low voltage of 5.4 V, showing great promise of lead-free metal halides for solution-processed white LED applications.

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Structural modulation and assembling of metal halide perovskites for solar cells and light‐emitting diodes

InfoMat ◽

10.1002/inf2.12256 ◽

2021 ◽

Vol 3 (11) ◽

pp. 1218-1250

Author(s):

Xixia Liu ◽

Zhaofu Zhang ◽

Fen Lin ◽

Yuanhang Cheng

Keyword(s):

Solar Cells ◽

Light Emitting Diodes ◽

Metal Halide ◽

Light Emitting ◽

Structural Modulation ◽

Halide Perovskites

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Green Emitting Single-Crystalline Bulk Assembly of Metal Halide Clusters with Near-Unity Photoluminescence Quantum Efficiency

ACS Energy Letters ◽

10.1021/acsenergylett.9b00991 ◽

2019 ◽

Vol 4 (7) ◽

pp. 1579-1583 ◽

Cited By ~ 37

Author(s):

Chenkun Zhou ◽

Haoran Lin ◽

Jennifer Neu ◽

Yan Zhou ◽

Maya Chaaban ◽

...

Keyword(s):

Quantum Efficiency ◽

Metal Halide ◽

Single Crystalline

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On the assembly and structural modulation of lens fiber junctions

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100110805 ◽

1984 ◽

Vol 42 ◽

pp. 110-113

Author(s):

E.L. Benedetti ◽

I. Dunia ◽

Do Ngoc Lien ◽

O. Vallon ◽

D. Louvard ◽

...

Keyword(s):

Molecular Weight ◽

Natural History ◽

Intercellular Junctions ◽

Eye Lens ◽

Membrane Domains ◽

Functional Polymorphism ◽

Lens Fiber ◽

The Past ◽

Structural Modulation ◽

Biochemical Difference

In the eye lens emerging molecular and structural patterns apparently cohabit with the remnants of the past. The lens in a rather puzzling fashion sums up its own natural history and even transient steps of the differentiation are memorized. A prototype of this situation is well outlined by the study of the lenticular intercellular junctions. These membrane domains exhibit structural, biochemical and perhaps functional polymorphism reflecting throughout life the multiple steps of the differentiation of the epithelium into fibers and of the ageing process of the lenticular cells.The most striking biochemical difference between the membrane derived from the epithelium and from the fibers respectively, concerns the presence of the 26,000 molecular weight polypeptide (MP26) in the latter membranes.

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