Mechanism of magnetic field-modulated luminescence from lanthanide ions in inorganic crystal: a review

Zuo, Shanling; Chen, Ping; Pan, Caofeng

doi:10.1007/s12598-020-01450-0

Cited by 21 publications

(14 citation statements)

References 93 publications

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“…Piezotronics, regulating the carrier transport by piezo‐potential, 1–4 has received significant attentions and substantial expansion for intrinsic applications in piezoelectric, piezophototronics, and flexible devices due to the universality and pervasiveness of internal and external strain in the devices and non‐center symmetrical semiconductors 5–12 . Simultaneously, two‐dimensional (2D) materials were widely explored on optics, 13–24 electronics, 25–33 and magnetism 34–41 . since the first discovery of single atomic thickness graphene.…”

Section: Introductionmentioning

confidence: 99%

Piezotronics in two‐dimensional materials

Zhang

Zuo

Chen

et al. 2021

InfoMat

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The fascinating two‐dimensional (2D) materials are being potentially applied in various fields from science to engineering benefitting from the charming physical and chemical properties on optics, electronics, and magnetism, compared with the bulk crystal, while piezotronics is a universal and pervasive phenomenon in the materials with broking center symmetry, promoting the new field and notable achievements of piezotronics in 2D materials with higher accuracy and sensitivity. For example, 20 parts per billion of the detecting limitations in NO2 sensor, 500 μm of spatial strain resolution in flexible devices, and 0.363 eV output voltage in nanogenerators. In this review, three categories of 2D piezotronics materials are first introduced ranging from organic to inorganic data, among which six types of 2D inorganic materials are emphasized based on the geometrical arrangement of different atoms. Then, the microscopic mechanism of carrier transport and separation in 2D piezotronic materials is highlighted, accompanied with the presentation of four measured methods. Subsequently, the developed applications of 2D piezotronics are discussed comprehensively including different kinds of sensors, piezo‐catalysis, nanogenerators and information storage. Ultimately, we suggest the challenges and provide the ideas for qualitative–quantitative research of microscopic mechanism and large‐scale integrated applications of 2D piezotronics.

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Section: Introductionmentioning

confidence: 99%

Piezotronics in two‐dimensional materials

Zhang

Zuo

Chen

et al. 2021

InfoMat

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“…Second, they change the local energy band junction of friction materials at the interface, which leads to a more efficient electron transfer than that in bulk materials. [43][44][45][46] Third, they improve the hydrophobicity and reduce the amount of residual liquid at the interface, which prevents the ions from the waterdrop from participating in the formation of the EDLs that reduce the TENG performance. The highly hydrophobic surface can also make the separation step during a contactseparation process more thorough.…”

Section: Structure Design Electrical Output Performance and Working P...mentioning

confidence: 99%

Energy Conversion Analysis of Multilayered Triboelectric Nanogenerators for Synergistic Rain and Solar Energy Harvesting

Yang

Liu

et al. 2022

Advanced Materials

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The triboelectric nanogenerator (TENG) is an emerging technology that offers excellent potential for the conversion of mechanical energy from rain into electricity for hybrid energy applications. However, a high‐performance TENG is yet to be achieved because a quantitative analysis method for the energy conversion process is still lacking. Herein, a quantitative analysis method, termed the "kinetic energy calculation and current integration" (KECCI) method, which significantly improves the understanding of the mechanical‐to‐electrical energy conversion process, is presented. Based on the KECCI method, a high‐performance TENG is developed by systematically optimizing a biomimetic surface structure and instant switch design, with 1.25 mA short‐circuit current (Isc), 150 V open‐circuit voltage (Voc), and a high energy‐conversion efficiency of 24.89%. Furthermore, a multilayered TENG device is proposed for continuously harvesting the kinetic energy of raindrops for further improvement in the energy‐conversion efficiency. Finally, the multilayered TENGs are integrated with organic photovoltaics, achieving all‐weather energy harvesting. This work presents a validated theoretical basis that will guide further development of TENGs toward higher performances, which will promote the commercialization of hybrid TENG systems for all‐weather applications.

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“…The applied magnetic field can not only activate Zeeman splitting of the 4f energy levels of Ln 3+ but also affect the local structure through interactions between magnetized ions, both of which are key factors determining upconversion emissions. 128 The 4 S 3/2 state of Er 3+ splits into two Kramers doublets in a magnetic field, namely | ± 1 / 2 ⟩ and |± 3 / 2 ⟩. 129−131 Electrons tend to populate the lowestlying |− 3 / 2 ⟩ level, which has a much lower transition probability than the upper ones.…”

Section: Engineering Local Structure By External Field Regulationmentioning

confidence: 99%

Local Structure Engineering in Lanthanide-Doped Nanocrystals for Tunable Upconversion Emissions

2021

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Upconversion emissions from lanthanide-doped nanocrystals have sparked extensive research interests in nanophotonics, biomedicine, photovoltaics, photocatalysis, etc. Rational modulation of upconversion emissions is highly desirable to meet the requirements of specific applications. Among the diverse developed methods, local structure engineering is fundamentally feasible, through which the upconversion emission intensity, selectivity, wavelength shift, and lifetime can be tuned effectively. The underlying mechanism of the local-structure-dependent upconversion emissions lies in the degree of parity hybridization and energy level splitting of lanthanide ions as well as the interionic energy transfer efficiency. Over the past few years, there has been significant progress in local-structure-engineered upconversion emissions. In this Perspective, we first introduce the principles of upconversion emissions and typical characterization methods for local structure. Subsequently, we summarize recent achievements in tuning of upconversion emissions through local structure engineering, including host composition adjustment, external field regulation, and interfacial strain management. Finally, we propose a few perspectives that should tackle the current bottlenecks. This Perspective is expected to deepen the understanding of local-structure-dependent upconversion emissions and arouse adequate attention to the engineering of local structure for desired properties of inorganic nanocrystals.

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Mechanism of magnetic field-modulated luminescence from lanthanide ions in inorganic crystal: a review

Cited by 21 publications

References 93 publications

Piezotronics in two‐dimensional materials

Piezotronics in two‐dimensional materials

Energy Conversion Analysis of Multilayered Triboelectric Nanogenerators for Synergistic Rain and Solar Energy Harvesting

Local Structure Engineering in Lanthanide-Doped Nanocrystals for Tunable Upconversion Emissions

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