Microcavity top-emission perovskite light-emitting diodes

Miao, Yanfeng; Lü, Cheng; Zou, Wei; Gu, Lianghui; Zhang, Ju; Guo, Qiang; Peng, Qiming; Xu, Mengmeng; He, Yarong; Zhang, Shuting; Cao, Yu; Li, Renzhi; Wang, Nana; Huang, Wei; Wang, Jianpu

doi:10.1038/s41377-020-0328-6

Cited by 108 publications

(101 citation statements)

References 35 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…η oc thus vastly improved due to the microcavity effect (Fig. 8h ), and a high peak EQE of 20.2% in the quasi-2D PeLEDs was achieved 29 . More recently, Chen et al 153 designed a rational device structure that utilizes the near-field coupling between different emitters via evanescent fields to extract trapped photons.…”

Section: High-performance Quasi-2d Peledsmentioning

confidence: 93%

“…In the past five years, we have witnessed the rapid development of quasi-2D perovskite optoelectronics, especially their tremendous success in LED applications. The recorded EQE of LEDs has soared to 21% and approached the efficiency limit 22 , 29 since the first example was reported in 2016 30 .…”

Section: Introductionmentioning

confidence: 94%

“…In addition, quasi-2D perovskites exhibit tunability of their spectra, which can be modulated through composition and dimensionality engineering respectively. These characteristics enable continuous photoluminescence (PL) wavelength tuning from violet to near-infrared (NIR) spectral regions 29 , 43 – 45 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

et al. 2021

View full text Add to dashboard Cite

Quasi-two-dimensional (quasi-2D) perovskites have attracted extraordinary attention due to their superior semiconducting properties and have emerged as one of the most promising materials for next-generation light-emitting diodes (LEDs). The outstanding optical properties originate from their structural characteristics. In particular, the inherent quantum-well structure endows them with a large exciton binding energy due to the strong dielectric- and quantum-confinement effects; the corresponding energy transfer among different n-value species thus results in high photoluminescence quantum yields (PLQYs), particularly at low excitation intensities. The review herein presents an overview of the inherent properties of quasi-2D perovskite materials, the corresponding energy transfer and spectral tunability methodologies for thin films, as well as their application in high-performance LEDs. We then summarize the challenges and potential research directions towards developing high-performance and stable quasi-2D PeLEDs. The review thus provides a systematic and timely summary for the community to deepen the understanding of quasi-2D perovskite materials and resulting LED devices.

show abstract

Section: High-performance Quasi-2d Peledsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 94%

See 1 more Smart Citation

High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Another internal light outcoupling method is the use of the microcavity effect, since the radiative decay rate can be increased through the Purcell effect [238] when placing an emitter in a Fabry-Perot microcavity [239]. Wang et al employed the microcavity effect to enhance light extraction of PeLEDs [240]. The microcavity was formed via a total-reflection Au bottom electrode and a semitransparent Au top electrode in a top-emission architecture, where the length of the cavity was tuned by changing the thickness of carrier transport layers.…”

Section: The Manipulation Of Optical Effectsmentioning

confidence: 99%

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Xiao

Cheng

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

Recently, perovskite light-emitting diodes (PeLEDs) are seeing an increasing academic and industrial interest with a potential for a broad range of technologies including display, lighting, and signaling. The maximum external quantum efficiency of PeLEDs can overtake 20% nowadays, however, the lifetime of PeLEDs is still far from the demand of practical applications. In this review, state-of-the-art concepts to improve the lifetime of PeLEDs are comprehensively summarized from the perspective of the design of perovskite emitting materials, the innovation of device engineering, the manipulation of optical effects, and the introduction of advanced encapsulations. First, the fundamental concepts determining the lifetime of PeLEDs are presented. Then, the strategies to improve the lifetime of both organic-inorganic hybrid and all-inorganic PeLEDs are highlighted. Particularly, the approaches to manage optical effects and encapsulations for the improved lifetime, which are negligibly studied in PeLEDs, are discussed based on the related concepts of organic LEDs and Cd-based quantum-dot LEDs, which is beneficial to insightfully understand the lifetime of PeLEDs. At last, the challenges and opportunities to further enhance the lifetime of PeLEDs are introduced.

show abstract

“…In the last decade, metal halide perovskite materials with the chemical formula ABX 3 , where A, B, and X are usually monovalent cations (CH 3 NH 3 + or MA + , HC(NH 2 ) 2 + or FA + , Cs + ), divalent metal cations (Pb 2+ , Sn 2+ ), and halide ions (Cl − , Br − , I − ), respectively, have attracted significant attention due to their outstanding properties, including: a high absorption coefficient, [ 1–4 ] narrow bandwidth emission, [ 5,6 ] low trap state density, [ 7–11 ] long carrier diffusion length and lifetimes, [ 9,12–14 ] and high carrier mobility. [ 13,15 ] These competitive advantages have triggered wide applications in various photoelectronic devices.…”

Section: Introductionmentioning

confidence: 99%

Metal Halide Perovskite Nanocrystal Solar Cells: Progress and Challenges

et al. 2020

View full text Add to dashboard Cite

ultrasonication methods, [22] solvothermal approaches, [23] microwave-assisted synthesis, [24] and mechanical grinding. [25] PNCs not only inherit perovskite properties, but also possess the features of nanomaterials, such as their size-confinement effect and ease of processing as a colloidal ink, making PNCs suitable for incorporation into various electronic devices and compatible with printing techniques. [19,26] Moreover, nanoscale perovskites exhibit superior phase stability, particularly for CsPbI 3 and FAPbI 3 , due to their lattice construction and large surface energy. [27,28] Compared with traditional II-VI and III-V semiconductor nanocrystals, PNCs also exhibit unique properties. [29-32] Firstly, facile synthesis with inexpensive precursors can be conducted at room temperature with PNCs without inert gas protection. PNCs also have a bandgap ranging from the ultraviolet to nearinfrared, through which they can be easily tuned by size management and composition adjustment. Furthermore, they exhibit narrow bandwidth emission (<100 meV) over the entire visible range. PNCs also exhibit a fluorescence quantum yield near unity without additional passivation due to the defect-tolerance effect. Finally, they also demonstrate negligible self-absorption and Förster resonance energy transfer. These remarkable characteristics make PNCs more favorable than their bulk counterparts and traditional semiconductor nanocrystals. Thus, PNCs have promising applications in light-emitting diodes (LEDs), [33] lasers, [34] photodetectors, [35,36] and solar cells. [28] In 2016, Luther et al. first used CsPbI 3 PNCs to fabricate solar cells using a layer-by-layer approach. [28] The solar cell exhibited an extremely high open-circuit voltage (V OC) of 1.23 V, which was ≈85% of the Shockley-Queisser (S-Q) limited V OC , and a high power conversion efficiency (PCE) of 10.77%. This value was comparable to those of state-of-the-art PbS nanocrystal solar cells, [37] indicating the potential of PNC solar cells. To date, the highest PCE achieved by PNC solar cells has reached 17.39%. [38] Though PCEs have shown rapid, significant improvements, they are still limited compared to solar cells fabricated by bulk perovskite materials. Moreover, most studies on PNC solar cells have only been reported over the past two years. Research on PNC solar cells is still in its infancy, leaving substantial room for further improvement. Herein, we review the progress in the field of PNC solar cells. This review starts with detailing the unique advantages of PNCs. Next, we analyze current factors limiting their performance and Perovskite nanocrystal (PNC) solar cells have attracted increasing interest in recent years because of their excellent optoelectronic properties and unique advantages, which distinguish them from conventional nanocrystals and their bulk counterparts. This emerging type of photovoltaic is promising but faces many challenges regarding commercialization. Therefore, a comprehensive review is presented on the recent progress and current ch...

show abstract

Microcavity top-emission perovskite light-emitting diodes

Cited by 108 publications

References 35 publications

High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Metal Halide Perovskite Nanocrystal Solar Cells: Progress and Challenges

Contact Info

Product

Resources

About