Single-emissive-layer all-perovskite white light-emitting diodes employing segregated mixed halide perovskite crystals

Yu, Hongling; Wang, Heyong; Pozina, Galia; Yin, Chunyang; Liu, Xiaoke; Gao, Feng

doi:10.1039/d0sc04508j

Cited by 21 publications

(27 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Adapted from paper reference. [185] Our findings reveal that single-EML all-perovskite white LEDs are possible via effective modulation of perovskite precursor solution, which will spur new development of high-performance white PeLEDs.…”

Section: Single-eml All-perovskite White Ledsmentioning

confidence: 74%

“…Adapted from paper reference. [185] The effective modulation of the perovskite precursor solution is the key to the suppression of anion exchange and energy transfer. The secondary electron (SE) image in Figure 5.6a shows that there are two different types of grains in the perovskite film, rod-like (like Point 1) and plate-like grains (like Point 2).…”

Section: Single-eml All-perovskite White Ledsmentioning

confidence: 99%

See 1 more Smart Citation

Color Tuning for Perovskite Light-Emitting Diodes

2020

Linköping Studies in Science and Technology. Dissertations

Self Cite

View full text Add to dashboard Cite

Metal halide perovskites (MHPs) are recognized as promising semiconductor materials for a variety of optical and electrical device applications due to their cost-effective and outstanding optoelectronic properties. As one of the most significant applications, perovskite light-emitting diodes (PeLEDs) hold promise for future lighting and display technologies, attributed to their high photoluminescence quantum yield (PLQY), high color purity, and tunable emission color. The emission colors of PeLEDs can be tuned by mixing the halide anions, adjusting the size of perovskite nanocrystals, or changing the dimensionality of perovskites. However, in practice, all these different approaches have their own advantages and challenges. This thesis centres around the color tunability of perovskites, aiming to develop PeLEDs with different colors using different approaches.

show abstract

Section: Single-eml All-perovskite White Ledsmentioning

confidence: 74%

Section: Single-eml All-perovskite White Ledsmentioning

confidence: 99%

Color Tuning for Perovskite Light-Emitting Diodes

2020

Linköping Studies in Science and Technology. Dissertations

Self Cite

View full text Add to dashboard Cite

show abstract

“…Many PeLEDs have been demonstrated with EQEs higher than 20% in the green 75 – 77 , red 78 , 79 , and near-infrared 80 – 82 regions. In addition to these exciting results, WPeLEDs, especially SEL–WPeLEDs, have also been developed rapidly 26 – 29 , 83 – 87 . In 2016, just after some of the earliest reports of PeLEDs, a SEL-WPeLED (Fig.…”

Section: Cases Of Wleds With a Single Emissive Layermentioning

confidence: 99%

“…In addition, perovskite as an SEL with different components has also been proven to achieve white electroluminescence, and the device structure is shown in Fig. 8e 87 . In this device, an organic material (benzamidine hydrochloride, BHCl) successfully controlled the perovskite precursor solution to form segregated CsPb(Br 1− x Cl x ) 3 and CsPb(Br 1− y I y ) 3 grains (Fig.…”

Section: Cases Of Wleds With a Single Emissive Layermentioning

confidence: 99%

Research progress of full electroluminescent white light-emitting diodes based on a single emissive layer

et al. 2021

View full text Add to dashboard Cite

Carbon neutrality, energy savings, and lighting costs and quality have always led to urgent demand for lighting technology innovation. White light-emitting diodes (WLEDs) based on a single emissive layer (SEL) fabricated by the solution method have been continuously researched in recent years; they are advantageous because they have a low cost and are ultrathin and flexible. Here, we reviewed the history and development of SEL–WLEDs over recent years to provide inspiration and promote their progress in lighting applications. We first introduced the emitters and analysed the advantages of these emitters in creating SEL–WLEDs and then reviewed some cases that involve the above emitters, which were formed via vacuum thermal evaporation or solution processes. Some notable developments that deserve attention are highlighted in this review due to their potential use in SEL–WLEDs, such as perovskite materials. Finally, we looked at future development trends of SEL–WLEDs and proposed potential research directions.

show abstract

“…Gao et al reported a single-emissive layer all-perovskite white PLED, in which the perovskite film consists of separated mixed halide perovskite phases with blue and red emission. 29 The authors believed that benzamidine hydrochloride (BHCl) and PbBr 2 are the key factors leading to the segregation of phases with blue and red emission. 29 In our research, we found that even without large organic ligands, Cs large organic ligands might not be the decisive factor that leads to dual emission.…”

mentioning

confidence: 99%

Realizing White Emission of Single-Layer Dual-Color Perovskite Light-Emitting Devices by Modulating the Electroluminescence Emission Spectra

Liu

Jiang

Fan

et al. 2021

J. Phys. Chem. Lett.

View full text Add to dashboard Cite

Dual-color emission in a single perovskite layer would make perovskite light-emitting devices (PLEDs) more competitive compared with other display technologies. However, due to the carrier dynamics in a blended perovskite film and the low reaction activation energy of the halide exchange reaction, it is very difficult to achieve the dual-color emission in a perovskite layer. Here, dual-color electroluminescence (EL) emission in a single perovskite layer has been realized by slowing the energy transfer from wide-bandgap energy levels to narrow-bandgap energy levels. Moreover, the EL spectra can be controlled by modulating the composition of the perovskite layer. When the amount of CH 3 NH 3 I(MAI) in the precursor was varied, white emission with CIE coordinates of (0.33, 0.34) could be achieved. Our work proposes a new strategy for white emission from PLEDs. Also, the analysis and discussion of carrier dynamics in this work may help to enhance our understanding of the working mechanism of PLEDs.

show abstract

Single-emissive-layer all-perovskite white light-emitting diodes employing segregated mixed halide perovskite crystals

Abstract: Metal halide perovskites have demonstrated impressive properties for achieving efficient monochromatic light-emitting diodes. However, the development of white perovskite light-emitting diodes (PeLEDs) remains a big challenge. Here, we demonstrate a...

Cited by 21 publications

References 36 publications

Color Tuning for Perovskite Light-Emitting Diodes

Color Tuning for Perovskite Light-Emitting Diodes

Research progress of full electroluminescent white light-emitting diodes based on a single emissive layer

Realizing White Emission of Single-Layer Dual-Color Perovskite Light-Emitting Devices by Modulating the Electroluminescence Emission Spectra

Contact Info

Product

Resources

About