Efficient Red Perovskite Light‐Emitting Diodes Based on Solution‐Processed Multiple Quantum Wells

Zhang, Shuting; Yi, Chul-Young; Wang, Nana; Sun, Yan; Zou, Wei; Wei, Yingqiang; Cao, Yu; Miao, Yanfeng; Li, Renzhi; Yin, Yao; Zhao, Ni; Wang, Jianpu; Huang, Wei

doi:10.1002/adma.201606600

Cited by 166 publications

(165 citation statements)

References 33 publications

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“…This material exhibits strong exciton behavior. There are many options for organic ligands such as phenylethylammonium (PEA), butylammonium, ethylammonium, phenylmethylamine, phenylbutylammonium, naphthylmethylamine, and 2‐phenoxyethylamine …”

Section: Synthesis Of Perovskite Ncsmentioning

confidence: 99%

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Wang

et al. 2019

InfoMat

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In recent years, metal halide perovskite nanocrystals (NCs) have been favored by many researchers due to their unique properties including long carrier diffusion length, high carrier mobility, tunable emission wavelength, and narrow full width at half maximum, making them great application potentials in optoelectronic devices. The photoluminescence quantum yields of perovskite NCs are nearly 100%, and the device efficiency of perovskite NC‐based light‐emitting diodes (LEDs) has been improved significantly from below 0.1% to over 20%. In addition, perovskite NC‐based solar cells and photodetectors have also developed rapidly in recent years. Here, we summarize the synthesis and the basic optoelectronic properties of metal halide perovskite NCs and introduce their applications in LEDs, solar cells, and photodetectors.

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Section: Synthesis Of Perovskite Ncsmentioning

confidence: 99%

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Wang

et al. 2019

InfoMat

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“…This superior performance can be ascribed to the rapid energy transfer that occurs across the MQWs. Their work indicates that MQW perovskites have good prospects for use in the high‐performance visible range electroluminescent emission field . Because 2D perovskites can also form MQW structures composed of insulating organic layers and inorganic semiconductor layers, which allow the generation and electronic confinement of stable excitons, they are also promising for use in LEDs.…”

Section: Various Approaches To Construct Hop Spin‐related Optoelectromentioning

confidence: 99%

Spintronics of Hybrid Organic–Inorganic Perovskites: Miraculous Basis of Integrated Optoelectronic Devices

Liao

Cheng

et al. 2019

Advanced Optical Materials

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Hybrid organic–inorganic perovskite (HOP) spintronics aims to make full use of the properties of electron spin. HOP spintronics has recently emerged as a promising field of research because it provides a new precisely manipulable degree of freedom. The flourishing development activity in this field has benefited from the unique intrinsic spin‐related optoelectronic properties of HOPs, which include triplet formation, a large Stark effect, the magneto‐optical effect, polarized light‐related effects, and complex light emission characteristics, which offer the possibility of providing a new way to control the performance of integrated optoelectronic devices through spin interactions between photons and electrons. Along with the continuous improvements in the theoretical research into HOP spintronics, large numbers of novel optoelectronic devices have been proposed and demonstrated experimentally and have shown great potential for fabrication of next‐generation, high‐performance integrated optoelectronic chips. This review provides an overview of the fundamental principles, novel spin‐generated physical effects, and diverse structures of HOP spintronics systems, along with the applications of HOP spintronics in optoelectronic devices, while also undertaking a general review of the remaining challenges and proposing possible development directions that require further study for the application of HOP spintronics to integrated optoelectronic devices.

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“…[55] Furthermore, by inserting the large OA molecules into the 3D perovskite structure, the resulted RP phase PNCs demonstrated PeLEDs with dramatically improved CE and EQE due to the energy funneling effect. [63][64][65]98,100] Very recently, a high efficient green emission PeLED employing quasi 2D PNCs was reported with record CE of 62.4 cd A −1 and EQE of 14.36%. [92] Through lowmagnification high-angle annular dark-field, an ordered spatial distribution of the RP phases where the majority of large-n phases are located close to the hole transporting layer is discovered by Wang and co-workers.…”

Section: Electroluminescencementioning

confidence: 99%

“…As mentioned above, the quasi 2D PNC structure can be denoted as L 2 A n−1 B n X 3n+1 . Plenty of investigations have been conducted on the choices of bulky cation L, including PEA, [56,63,64,[89][90][91][92] BA, [55,88,[93][94][95] ethylammonium (EA), [96] phenylmethylamine (PMA), [97] phenylbutylammonium (PBA), [98,99] naphthylmethylamine (NMA) [65,100] and 2-Phenoxyethylamine (POEA). [101] Similar to the pure 2D structure, with the space dimension reduced to nanosized 3D or quasi 2D, the PNCs exhibit strong excitonic behavior.…”

Section: Organic Ammonium Assisted In Situ Fabricationmentioning

confidence: 99%

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

Chang

Bai

Zhong

2018

Advanced Optical Materials

180

122

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in bulk halide perovskites, long carrier diffusion length, and an absorption range covering the visible solar spectrum, collectively enable the high performance of photo electricity conversion. Compared to the bulk materials, perovskite nanocrystals or quantum dots (usually denoted as PNCs or PQDs) show obvious excitonic features with enhanced photoluminescence (PL) properties due to the well-known size-dependent quantum confinement effects. [14][15][16][17] The combination of color saturated emissions, super high quantum yield (QY), as well as easy processing inspired the intensive exploration of PNCs as light emitters, which is now under spotlights in the field of optical materials.The first perspective aim of PNCs is to alternate the state-of-the-art CdSe or InP quantum dots (QDs) as new generation luminescence materials. [18,19] As shown in Figure 1, these QD materials have been well demonstrated to be potential functional components for photonic and optoelectronic applications, and are currently on the way to industrialization. [20][21][22][23] Specifically, QDs can be employed as fluorescence labels, [24] laser gain media, [25] LED phosphors, [26] and down-shifting films for LCD backlights. [27,28] They can also be processed into thin film for optoelectronic devices including solar cells, [29] photodetectors, [30,31] transistors [32] and LEDs. [33] The PNCs outcompete these conventional QDs in terms of narrower full width at half maximum (FWHM) and low fabrication cost, but most importantly, the ease of in situ preparation. [34,35] Herein, this progress report highlight the developments of in situ fabricated PNCs.Colloidal semiconductor QDs are typically synthesized ex situ in flasks by hot injection method, stabilized by surface ligands. [36][37][38][39] To incorporate such solution based materials into applications usually requires purification, redispersion and surface engineering. For instance, ligand exchange is often employed to disperse QDs into aimed solvent, inducing defects that inevitably derogating the PLQYs. [40] Moreover, the organic ligands themselves also suffer from the risk of disabsorbing, reducing the stability of the QDs and thus the final devices. [41] Because halide perovskite are ionic compounds that can be well dissolved into polar solvents, PNCs can be fabricated through either ex situ routes in flask or in situ strategies on substrates. The in situ fabricated PNCs are adaptable to devices integration due to their scalable and low-cost manufacturing. In this regard, more and more efforts have been made in terms of the controlling synthesis, physical properties and device applications of PNC materials.After over 30 years of development, colloidal quantum dots have now become mature luminescent materials in photonic and optoelectronic operations and start to hit the market. The emerging perovskite nanocrystals are expected to promote large-scale commercialization due to their superior optical properties as well as low cost and easy fabrication. This progress report is focused on the...

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Efficient Red Perovskite Light‐Emitting Diodes Based on Solution‐Processed Multiple Quantum Wells

Cited by 166 publications

References 33 publications

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Spintronics of Hybrid Organic–Inorganic Perovskites: Miraculous Basis of Integrated Optoelectronic Devices

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

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