Preparation of Eu3+-doped CsPbBr3 quantum-dot microcrystals and their luminescence properties

Wu, Jiang; Bai, Haowen; Qu, Wenjie; Cao, Guanying; Zhang, Yanjie; Yu, Jingjie

doi:10.1016/j.optmat.2019.109454

Cited by 13 publications

(9 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… 23 Concerning MHPs, europium has been used to improve the operational and phase stability of perovskite solar cells 24 , 25 and employed to expand the luminescence properties of CsPbCl 3 and CsPbBr 3 nanocrystals for application in LEDs. 14 , 26 − 30 However, europium doping in low-dimensional MHPs and the use of functional organic cations to improve the lanthanide sensitization within the perovskite framework have been scarcely investigated.…”

Section: Introductionmentioning

confidence: 99%

Layered Perovskite Doping with Eu³⁺ and β-diketonate Eu³⁺ Complex

et al. 2021

View full text Add to dashboard Cite

Metal halide perovskites are attracting great interest for the fabrication of light-emitting devices encompassing light-emitting diodes, lasers, and scintillators. As the field develops, perovskite doping emerges as a promising way to enrich the material functionalities and enhance the luminescence yield and tunability. While Mn +2 addition has been well explored, doping with lanthanides has received less attention, even though their intense and line-like luminescence is interesting for a wide range of applications. In this work, we study the doping of NMA 2 PbBr 4 layered perovskites with Eu 3+ and Eu 3+ tetrakis β-diketonate complex. By exploiting the antenna effect of the naphthalene-based functional cation (NMA = 1-naphtylmethylammonium), direct sensitization of Eu 3+ is obtained; nevertheless, it is not very efficient due to the non-optimal energy level alignment with the resonance acceptor level of the lanthanide. Protection of Eu 3+ in the form of tetrakis β-diketonate complex grants a more ideal coordination geometry and energetic landscape for the energy transfer to europium in the perovskite matrix, allowing for a nearly 30-fold improvement in luminescence yield. This work sets the basis for new synthetic strategies for the design of functional perovskite/lanthanide host–guest systems with improved luminescence properties.

show abstract

Section: Introductionmentioning

confidence: 99%

Layered Perovskite Doping with Eu³⁺ and β-diketonate Eu³⁺ Complex

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In the report of Eu 3+ :CsPbBr 3 QDs by Wu et al, partial Eu 3+ replaced Pb 2+ , leading to a blue shift of the peak, while others exhibited red light emission [154]. With the increasing concentration of Eu 3+ , more of them entered the cell structure of HP-QDs, broadened emission peak and adjusted light from green to blue and then red were achieved [127].…”

Section: Photoemissionmentioning

confidence: 95%

“…Ion doping is a promising strategy in adjusting the electronic and optical properties of QDs [120]. For HP-QDs, it was verified that introducing metal ions like Mn 2+ [121][122][123][124], Sn 2+ [121,125], Ce 3+ [126], Eu 3+ [127] into the perovskite lattice of CsPbX 3 QD could help reach tunable energy gap [123], enhanced thermal stability [121] and improved PL efficiency [126]. The fabrication strategies of ion doping contains hotinjection and melt-quenching.…”

Section: Ion Dopingmentioning

confidence: 99%

“…Melt-quenching was used in 2019 for Sn 2+ and Eu 3+ doping by embedding HP-QDs inside borosilicate glass matrix [128]. Wu et al reported Eu 3+ :CsPbBr 3 QDs composites synthesized via blending Eu 2 O 3 , precursors of glass and precursors of CsPbBr 3 together with proper ratio followed by heat treatment and cooling ( Figure 6b) [127]. Sn 2+ :CsPbBr 3 QDs composite was obtained similarly using SnBr 2 instead as the source of Sn 2+ .…”

Section: Ion Dopingmentioning

confidence: 99%

“…Ion-doping, another type of compositing, was verified to enhance the thermal stability of HP-QDs via enhancing the formation energy [121], and improve their PL efficiency and intensity [127] by modulating the PL kinetics, where EQE of 4.4% was achieved [126]. Besides, by introducing ions, the toxicity of Pb 2+ could be reduced since some of them were replaced, and the emission peak position of HP-QDs could be adjusted by controlling the concentration of ions [153].…”

Section: Photoemissionmentioning

confidence: 99%

See 2 more Smart Citations

Recent advances in synthesis and application of perovskite quantum dot based composites for photonics, electronics and sensors

Wang

Ding

Mao

et al. 2020

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

show abstract

High‐Stability Patterned CsPbI_xBr₃₋_x Thin Films with Tunable Crystal Size Prepared by Solid‐Phase Reaction

Jin

Song

Liu

et al. 2021

Advanced Optical Materials

View full text Add to dashboard Cite

of optoelectronic devices such as solar cells, light-emitting diodes, lasers, photodetectors, and imagers. [1][2][3][4][5][6][7] These materials possess excellent photoelectric properties such as a tunable band gap, high optical absorption, long carrier diffusion length, and high carrier mobility. [8][9][10][11][12][13] Undoubtedly, various types of CsPbX 3 inorganic perovskite devices display satisfactory optoelectronic performance. However, in their practical application, there are still multiple obstacles to overcome, including poor stability, environmental pollution, high fabrication cost, and a complex technical process. [14][15][16][17] It is critical that a creative fabrication method capable of overcoming these issues is developed.Currently, the preparation of CsPbX 3 inorganic perovskite thin films predominantly relies on two traditional preparation methods. These are a liquid-phase reaction as used in spin coating and spray coating, etc., and a vapor-phase reaction such as chemical vapor deposition (CVD), and atmosphere reaction, etc. Both have inevitable shortcomings. In the liquid-phase method, precursor solution evaporation can cause poor surface coverage and internal channels which allow moisture into the internal structure, accelerating the decomposition of inorganic perovskite. [18] Furthermore, both liquid-phase and vapor-phase reactions cannot circumvent the production of large volumes of toxic gas from organic solutions and raw material evaporation, which are harmful to both the environment and workers. [19] In addition, some integrated optoelectronic devices including scintillators, display screens, and charge-coupled devices (CCD), require 2D high-precision arrays. [20] Whereas, their whole fabrication process based on traditional methods is quite expensive and complex, attributing to requirement of multistep positioning reaction of inorganic perovskite and advanced patterning techniques including E-beam lithography, photolithography, laser direct-write method, anodic aluminum oxide (AAO) template patterning, etc. [21][22][23] Consequently, adopting a solid-phase reaction method in place of traditional liquid-phase and vapor-phase reaction methods could essentially solve these issues.As we know, molecules vigorously diffuse under high temperature. Actually, only when molecule molar ratio of precursors are controlled exactly, and kept within a suitable reaction temperature, can a solid-phase reaction to produce CsPbX 3 inorganic perovskite be successful. Thus far, little attention has been paid Downsides such as pollution, stability, and cost limit the further optoelectronic applications of cesium lead halide inorganic perovskite thin films, prepared using traditional liquid-phase and vapor-phase reactions. This study investigates the preparation of inorganic perovskite CsPbI x Br 3−x (x = 0, 1, 2, 3) thin films based on a solid-phase reaction. Two solid-phase precursor thin films, with an appropriate thickness ratio, are deposited by pulsed laser deposition (PLD) and subsequently react under ...

show abstract

Preparation of Eu3+-doped CsPbBr3 quantum-dot microcrystals and their luminescence properties

Cited by 13 publications

References 44 publications

Layered Perovskite Doping with Eu³⁺ and β-diketonate Eu³⁺ Complex

Layered Perovskite Doping with Eu³⁺ and β-diketonate Eu³⁺ Complex

Recent advances in synthesis and application of perovskite quantum dot based composites for photonics, electronics and sensors

High‐Stability Patterned CsPbI_xBr₃₋_x Thin Films with Tunable Crystal Size Prepared by Solid‐Phase Reaction

Contact Info

Product

Resources

About

Preparation of Eu3+-doped CsPbBr3 quantum-dot microcrystals and their luminescence properties

Cited by 13 publications

References 44 publications

Layered Perovskite Doping with Eu3+ and β-diketonate Eu3+ Complex

Layered Perovskite Doping with Eu3+ and β-diketonate Eu3+ Complex

Recent advances in synthesis and application of perovskite quantum dot based composites for photonics, electronics and sensors

High‐Stability Patterned CsPbIxBr3−x Thin Films with Tunable Crystal Size Prepared by Solid‐Phase Reaction

Contact Info

Product

Resources

About

Layered Perovskite Doping with Eu³⁺ and β-diketonate Eu³⁺ Complex

Layered Perovskite Doping with Eu³⁺ and β-diketonate Eu³⁺ Complex

High‐Stability Patterned CsPbI_xBr₃₋_x Thin Films with Tunable Crystal Size Prepared by Solid‐Phase Reaction