Bright Light‐Emitting Diodes Based on Organometal Halide Perovskite Nanoplatelets

Ling, Yichuan; Zhao, Yuan; Tian, Yu; Wang, Xi; Wang, Jamie; Xin, Yan; Hanson, Kenneth; Ma, Biwu; Gao, Hanwei

doi:10.1002/adma.201503954

Cited by 483 publications

(420 citation statements)

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“…Here, the PEDOT:PSS acts as the hole-injection layer, the PVK:PBD (poly(9-vinylcarbazole):2-(4-biphenylyl)-5-phenyl-1,3,4-oxadiazole) as the bipolar host and the BCP as the The performance of LEDs depends on the radiative recombination of electrons and holes in the active layer, where the film morphology has a vital role. 32,112 Incorporation of perovskite NCs into a dielectric polymer matrix may help to reduce non-radiative current losses, as demonstrated by Di et al 85 Perovskite NW arrays have also been used for the fabrication of LEDs with a device structure of glass/ITO/PEDOT:PSS/CH 3 NH 3 PbBr 3 -NWs/F8/Ca/Ag, as demonstrated by Yang and colleagues. 71 Recently, LEDs based on all-inorganic perovskite NCs have also been demonstrated.…”

Section: Applications Of Perovskite Ncs Perovskite Ncs In Ledsmentioning

confidence: 95%

“…Similar effects have been also reported by other groups. 32,46,51,59 For instance, Snaith and colleagues 90 used the same approach to demonstrate tunable PL from MAPbI 3 NCs. The increase of octylamine content in the reaction medium resulted similarly in the formation of nanoplatelets.…”

Section: Quantum Confinement In Perovskite Ncsmentioning

confidence: 99%

“…LEDs based on perovskite NCs, which have significantly higher quantum efficiencies than bulk perovskite films, are expected to exhibit far superior performance. 32,38 Gao and colleagues 32 reported bright green LEDs using MAPbBr 3 nanoplatelets in a device made of glass/ITO/ PEDOT: PSS/ H 3 NH 3 PbBr 3 -PVK:PBD/BCP (bathocuproine, 50 nm)/LIF/Al (Figures 10a and b). Here, the PEDOT:PSS acts as the hole-injection layer, the PVK:PBD (poly(9-vinylcarbazole):2-(4-biphenylyl)-5-phenyl-1,3,4-oxadiazole) as the bipolar host and the BCP as the The performance of LEDs depends on the radiative recombination of electrons and holes in the active layer, where the film morphology has a vital role.…”

Section: Applications Of Perovskite Ncs Perovskite Ncs In Ledsmentioning

confidence: 99%

“…Perovskite NCs have already shown great promise in many applications such as lasers, LEDs and photovoltaic devices. 10,23,[31][32][33][34][35][36][37][38] Even though the research on perovskite NCs is still in its starting stage, they are expected to have a significant role in the development of modern nanoscience and nanotechnology in the near future. This review provides an overview of the up-to-date developments in the synthesis of hybrid organicinorganic and all-inorganic perovskite NCs, their attractive optical properties and related emerging applications.…”

Section: Introductionmentioning

confidence: 99%

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Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

et al. 2016

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Lead halide perovskite nanocrystals (NCs) are receiving a lot of attention nowadays, due to their exceptionally high photoluminescence quantum yields reaching almost 100% and tunability of their optical band gap over the entire visible spectral range by modifying composition or dimensionality/size. We review recent developments in the direct synthesis and ion exchange-based reactions, leading to hybrid organic-inorganic (CH 3 NH 3 PbX 3 ) and all-inorganic (CsPbX 3 ) lead halide (X = Cl, Br, I) perovskite NCs, and consider their optical properties related to quantum confinement effects, single emission spectroscopy and lasing. We summarize recent developments on perovskite NCs employed as an active material in several applications such as light-emitting devices, solar cells and photodetectors, and provide a critical outlook into the existing and future challenges.

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Section: Applications Of Perovskite Ncs Perovskite Ncs In Ledsmentioning

confidence: 95%

Section: Quantum Confinement In Perovskite Ncsmentioning

confidence: 99%

Section: Applications Of Perovskite Ncs Perovskite Ncs In Ledsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

et al. 2016

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“…[1] Different methods have been developed to try to controllably diminish the size of methyl ammonium lead halide (MAPbX 3 , X = Cl, Pb, I) crystals, [2][3][4][5][6][7] motivated by the interest these perovskites generate in the field of optoelectronics. [8][9][10][11][12] Efforts in obtaining dispersions of hybrid organic-inorganic perovskite nanocrystals for optoelectronic applications have mainly focused on MAPbBr 3 and MAPbBr x I 3-x , as this allows achieving visible emission bands. MAPbI 3 , on the other hand, is an efficient near infrared emitter and presents a lower lasing threshold than MAPbBr 3 .…”

Section: Communicationmentioning

confidence: 99%

Strong Quantum Confinement and Fast Photoemission Activation in CH₃NH₃PbI₃ Perovskite Nanocrystals Grown within Periodically Mesostructured Films

Anaya

Rubino

Rojas

et al. 2017

Advanced Optical Materials

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CommuniCation(1 of 7) 1601087 synthesis of PbI 2 nanocrystals and their subsequent reaction with CH 3 NH 3 I 3 to produce the corresponding organic-inorganic lead halide quantum dots. [4] More recently, powders of porous silica exhibiting a 2D hexagonal mesopore structure have been used as templates to synthesize MAPbI 3 nanocrystals. [14,15] This approach proved to be suitable to attain bright and stable emission whose spectrum could be controlled by the average pore size of the matrix. However, most applications foreseen for hybrid perovskites require the use of thin films of high optical quality, as well as versatility regarding the composition of the scaffold employed. In order to achieve this goal, mesostructures with geometries other than the hexagonal one previously employed to host perovskite nanocrystals must be used, since the characteristic tubular channels tend to lie parallel to the substrate when the porous material is shaped as a film, becoming inaccessible from the top surface. This prevents their infiltration with perovskite precursors. Very recently, MAPbI 2 X (X = Cl, Br, I) compounds have been synthesized inside metal organic framework films, [16] but no control over the size and optical properties of MAPbI 3 was demonstrated.In this Communication, we demonstrate a synthetic route to obtain stabilized MAPbI 3 nanocrystals embedded in thin metal oxide films that display well-defined and adjustable quantum confinement effects over a wide range of 0.34 eV. Mesostructured TiO 2 and SiO 2 films displaying an ordered 3D pore network are prepared by evaporation induced self-assembly of a series of organic supramolecular templates in the presence of metal oxide precursors. The pores in the inorganic films obtained after thermal annealing are then used as nanoreactors to synthesize MAPbI 3 crystallites with narrow size distribution and average radius comprised between 1 and 4 nm, depending on the template of choice. Both the static and dynamic photoemission properties of the ensemble display features distinctive of the regime of strong quantum confinement. Photoemission maps demonstrate that the spectral and intensity properties of the luminescence extracted from the perovskite quantum dot loaded films are homogeneous over squared centimeters areas. In addition, the photoemission stationary state is reached 10 4 times faster than in a MAPbI 3 solid film. One of the most versatile strategies to tune the optical properties of a semiconductor consists in reducing its size until it becomes of the order of the exciton Bohr radius and quantum confinement effects arise. [1] Different methods have been developed to try to controllably diminish the size of methyl ammonium lead halide (MAPbX 3 , X = Cl, Pb, I) crystals, [2][3][4][5][6][7] motivated by the interest these perovskites generate in the field of optoelectronics. [8][9][10][11][12] Efforts in obtaining dispersions of hybrid organic-inorganic perovskite nanocrystals for optoelectronic applications have mainly focused on MAPbBr 3 and MAPbBr x I 3-x , a...

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Perovskite Materials: Solar Cell and Optoelectronic Applications

Yang

Geohegan

Xiao

2017

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Hybrid organometallic trihalide perovskites are promising candidates in the applications for next‐generation, high‐performance, low‐cost optoelectronic devices, including photovoltaics, light‐emitting diodes, and photodetectors. In particular, the solar cells based on this type of materials have reached 22% lab‐scale power conversion efficiency in only about 7 years, comparable to the other thin‐film photovoltaic technologies. Hybrid perovskite materials not only exhibit superior optoelectronic properties but also show many interesting physical properties such as ion migration and defect physics, which may allow the exploration of more device functionalities. In this article, the fundamental understanding of the interrelationships between crystal structure, electronic structure, and material properties is discussed. Various chemical synthesis and processing methods for superior device performance in solar cells and optoelectronic devices are reviewed.

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Bright Light‐Emitting Diodes Based on Organometal Halide Perovskite Nanoplatelets

Cited by 483 publications

References 49 publications

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

Strong Quantum Confinement and Fast Photoemission Activation in CH₃NH₃PbI₃ Perovskite Nanocrystals Grown within Periodically Mesostructured Films

Perovskite Materials: Solar Cell and Optoelectronic Applications

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Bright Light‐Emitting Diodes Based on Organometal Halide Perovskite Nanoplatelets

Cited by 483 publications

References 49 publications

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

Colloidal lead halide perovskite nanocrystals: synthesis, optical properties and applications

Strong Quantum Confinement and Fast Photoemission Activation in CH3NH3PbI3 Perovskite Nanocrystals Grown within Periodically Mesostructured Films

Perovskite Materials: Solar Cell and Optoelectronic Applications

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Strong Quantum Confinement and Fast Photoemission Activation in CH₃NH₃PbI₃ Perovskite Nanocrystals Grown within Periodically Mesostructured Films