Perovskite white light-emitting diodes based on a molecular blend perovskite emissive layer

Chang, Chi-Yao; Solodukhin, Alexander N.; Liao, Shih Yu; Mahesh, K.P.O.; Hsu, Cheng‐Hsing; Ponomarenko, Sergei A.; Luponosov, Yuriy N.; Chao, Yu Chiang

doi:10.1039/c9tc01509d

Cited by 55 publications

(48 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…17 MHPs are appealing materials not only in photovoltaics but also in LEDs, photodetectors, lasers and other optoelectronic applications, where a signicant progress had been also reported. [18][19][20][21][22][23][24] Researchers have shown that a synergetic effect can be realized by combining the advantages of these two classes of materials: perovskites and nanocrystals. 25 Extensive research has therefore concentrated on the synthesis, characterization and application of MHP NCs and particularly lead halide perovskite NCs, which may substitute traditional metal chalcogenide NCs in some applications.…”

Section: Introductionmentioning

confidence: 99%

The impact of ligands on the synthesis and application of metal halide perovskite nanocrystals

2021

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

The impact of ligands on the synthesis and application of metal halide perovskite nanocrystals

2021

View full text Add to dashboard Cite

show abstract

“…However, efficient white perovskite LEDs remain a significant challenge. Mixing single-color perovskite material with organic compound 7,8 and stacking perovskite layers with various colors 9 have been used to achieve white lead-halide perovskite LEDs, but the peak EQE is only 0.22% 9 . Alternatively, various metal halides possessing broadband white-light emission, such as two-dimensional lead halide perovskite [10][11][12] , lead-free halide double perovskite 13 , and cesium copper halides 14 , have been developed to be emitters in white LEDs.…”

mentioning

confidence: 99%

Efficient and bright warm-white electroluminescence from lead-free metal halides

et al. 2021

View full text Add to dashboard Cite

Solution-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.

show abstract

“…For instance, green-emitting Br 3 -based LEDs with EQEs of up to 17.5% and 20.3% have been demonstrated by Zhang et al [171] and Lin et al [172], respectively. While these EQEs are far from those offered by InGaN-based LEDs, easy solution-processability makes these materials attractive for applications in solid-state lighting and nextgeneration display technologies [164,[173][174][175][176][177]. In addition, various perovskite-based photodetectors with high responsivities [178][179][180], flexibility [181][182][183][184], and fast response speeds [150,178,[185][186][187] have also been demonstrated widely [188].…”

Section: State-of-the-art Devicesmentioning

confidence: 99%

Group-III-nitride and halide-perovskite semiconductor gain media for amplified spontaneous emission and lasing applications

Ng¹,

Holguín‐Lerma²,

Kang³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Group-III-nitride optical devices are conventionally important for displays and solid-state lighting, and recently have garnered much interest in the field of visible-light communication. While visible-light laser technology has become mature, developing a range of compact, small footprint, high optical power components for the green-yellow gap wavelengths still requires material development and device design breakthroughs, as well as hybrid integration of materials to overcome the limitations of conventional approaches. The present review focuses on the development of laser and amplified spontaneous emission (ASE) devices in the visible wavelength regime using primarily group-III-nitride and halide-perovskite semiconductors, which are at disparate stages of maturity. While the former is well established in the violet-blue-green operating wavelength regime, the latter, which is capable of solution-based processing and wavelength-tunability in the green-yellow-red regime, promises easy heterogeneous integration to form a new class of hybrid semiconductor light emitters. Prospects for the use of perovskite in ASE and lasing applications are discussed in the context of facile fabrication techniques and promising wavelength-tunable light-emitting device applications, as well as the potential integration with group-III-nitride contact and distributed Bragg reflector layers, which is promising as a future research direction. The absence of lattice-matching limitations, and the presence of direct bandgaps and excellent carrier transport in halide-perovskite semiconductors, are both encouraging and thought-provoking for device researchers who seek to explore new possibilities either experimentally or theoretically. These

show abstract

Perovskite white light-emitting diodes based on a molecular blend perovskite emissive layer

Abstract: Perovskite white light-emitting diodes with only a single emissive layer were realized with CIE chromaticity coordinates of (0.3, 0.49).

Cited by 55 publications

References 31 publications

The impact of ligands on the synthesis and application of metal halide perovskite nanocrystals

The impact of ligands on the synthesis and application of metal halide perovskite nanocrystals

Efficient and bright warm-white electroluminescence from lead-free metal halides

Group-III-nitride and halide-perovskite semiconductor gain media for amplified spontaneous emission and lasing applications

Contact Info

Product

Resources

About