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  • AIP Publishing  (8)
  • Zhang, Yuanyuan  (8)
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  • AIP Publishing  (8)
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  • 1
    Online Resource
    Online Resource
    Enhanced phase separation in PEDOT:PSS hole transport layer by introducing phenylethylammonium iodide for efficient perovskite solar cells
    AIP Publishing ; 2022
    In:  Journal of Renewable and Sustainable Energy Vol. 14, No. 1 ( 2022-01-01)
    Details
    In: Journal of Renewable and Sustainable Energy, AIP Publishing, Vol. 14, No. 1 ( 2022-01-01)
    Abstract: In this study, we investigated property change in the poly(3,4-ethylenedioxythiophene) poly-styrene sulfonate (PEDOT:PSS) layer by introducing phenylethylammonium iodide (PEAI) in inverted p-i-n perovskite solar cells. After depositing PEAI on the PEDOT:PSS layer, PEA+ induces a screening effect and decreases the interaction between PSS and PEDOT chains, accelerating their phase separation. The separated PSS chains are drawn to the film surface owing to the Coulombic attraction between PEA+ and –SO3− groups. Additionally, the I− ion (−1 value) of PEAI is oxidized to I2 (0 value) after annealing, which contributes to the separation of PEDOT and PSS units. The modified PEDOT:PSS presents a smooth morphology, which contributes to the construction of improved perovskite film quality with enlarged grains and decreased trap defects, accelerating hole extraction and migration efficiency. Moreover, PEAI modification could also realize a favorable energy level match between the PEDOT:PSS layer and perovskite active layer. Consequently, the power conversion efficiency is enhanced from 15.95% to 18.71%, and light and thermal stabilities are improved for the PEAI-modified device.
    Type of Medium: Online Resource
    ISSN: 1941-7012
    URL: Article
    DOI: 10.1063/5.0077075
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2444311-6
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  • 2
    Online Resource
    Online Resource
    Specific cation stoichiometry control of SrMnO3-δ thin films via RHEED oscillations
    AIP Publishing ; 2021
    In:  Applied Physics Letters Vol. 118, No. 23 ( 2021-06-07)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 118, No. 23 ( 2021-06-07)
    Abstract: Cubic heteroepitaxial (001) SrMnO3-δ (SMO) films were grown on SrTiO3 substrates by atomic alternating layer molecular beam epitaxy. Precise control of cation stoichiometry was achieved by in situ reflection high-energy electron diffraction (RHEED) oscillation. During SMO film growth, a correlation between RHEED oscillation features and the cation stoichiometry/monolayer dose was established. In non-stoichiometric films, there were out-of-plane lattice expansions due to off-stoichiometry-dependent defects, including Ruddlesden–Popper SrO planar faults in Sr-rich films and Sr vacancy defect clusters in Mn-rich films.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/5.0048085
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2021
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 3
    Online Resource
    Online Resource
    Scaling behavior for (Bi0.5Na0.5)TiO3 based lead-free relaxor ferroelectric ceramics
    AIP Publishing ; 2017
    In:  Journal of Applied Physics Vol. 122, No. 6 ( 2017-08-14)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 122, No. 6 ( 2017-08-14)
    Abstract: The dynamic hysteresis and scaling behavior of unpoled 0.96(Bi0.5Na0.5)TiO3-0.04BiAlO3 lead-free relaxor ceramics were investigated through the evolution of the hysteresis loops at a wide frequency (f) and electric-field amplitude (Eo) range. The variation of the hysteresis area ⟨A⟩ and remanent polarization Pr clearly suggested three stages of polarization reversal with increasing external electric fields. It was found that the dynamic hysteresis area in the low-Eo and high-Eo regions followed the power law relationships: 〈A〉∝f−0.14Eo3.30 (Eo ≤ 5.0 kV/mm) and 〈A〉∝f0.064Eo−0.6Eo1.65(Eo ≥ 6.2 kV/mm), respectively. Those power-law functions did not fit in the second stage (5.0 kV/mm & lt; Eo & lt; 6.2 kV/mm), where different numbers of polar nanoregions or nanodomains can be activated and transformed into macrodomains. The polarization mechanisms of above mentioned three stages were ascribed to the domain wall motion, then the formation of microdomains within the disordered nanodomains or polar nanoregions, followed by the induced macrodomains aligning parallel to the applied electric field.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4997448
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2017
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 4
    Online Resource
    Online Resource
    Magnetocaloric effect in multiferroic Y-type hexaferrite Ba0.5Sr1.5Zn2(Fe0.92Al0.08)12O22
    AIP Publishing ; 2014
    In:  AIP Advances Vol. 4, No. 6 ( 2014-06-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 4, No. 6 ( 2014-06-01)
    Abstract: Magnetocaloric effect is investigated in multiferroic Ba0.5Sr1.5Zn2(Fe0.92Al0.08)12O22 ceramic with Y-type hexagonal system. Three magnetic transitions, from alternating longitudinal conical to mixed conical at ∼240 K, to ferrimagnetic at ∼297 K, further to paramagnetic at ∼702 K, are unambiguously determined. Furthermore, obvious MCE is shown, and the maximum values of the magnetic entropy change and relative cooling power are evaluated to be 1.53 JKg−1K−1 and 280 JKg−1 for a field change of 7 T, respectively. In addition, inverse MCE is also observed, which might be associated with the first-order magnetic phase transition between two incommensurate longitudinal conical phases.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.4883235
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 2583909-3
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  • 5
    Online Resource
    Online Resource
    Biofabrication of tissue-specific extracellular matrix proteins to enhance the expansion and differentiation of skeletal muscle progenitor cells
    AIP Publishing ; 2019
    In:  Applied Physics Reviews Vol. 6, No. 2 ( 2019-06-01)
    Details
    In: Applied Physics Reviews, AIP Publishing, Vol. 6, No. 2 ( 2019-06-01)
    Abstract: Skeletal muscle precursor cells (MPCs) are considered key candidates for cell therapy in the treatment of skeletal muscle dysfunction due to injury, disease, or aging. However, expansion of a sufficient number of functional skeletal muscle cells in vitro from a small tissue biopsy has been challenging due to changes in the phenotypic expression of these cells under nonnatural microenvironmental or traditional culture conditions. This review provides an overview of recent progress in the design and biofabrication of advanced tissue-specific extracellular matrix (ECM) proteins for use in the enhancement of expansion and differentiation of MPCs for cell therapy and 3D bioprinting. We start with a brief introduction about the existing progress, drawbacks, and emerging challenges in the culture and maintenance of long term primary human MPCs for cell therapy. With regard to MPC proliferation, elongation, fusion, and differentiation into mature myofibers, we systematically summarize the benefits and limitations of recent progress. The importance of tissue-specific ECM in skeletal muscle regeneration is discussed, in particular, the mechanisms, rationale, strategy, and methodologies for using tissue-specific ECM proteins for myogenesis in 2D and 3D culture environments. Furthermore, perspectives on the challenges in developing tissue-specific ECM proteins for cell therapy using human MPCs are described. Finally, we propose potential strategies for overcoming the challenges in the development of advanced tissue-specific ECM proteins for promoting cell therapy with human skeletal muscle cells.
    Type of Medium: Online Resource
    ISSN: 1931-9401
    URL: Article
    DOI: 10.1063/1.5088726
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2265524-4
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  • 6
    Online Resource
    Online Resource
    Anomalous laser deflection phenomenon based on the interaction of electro-optic and graded refractivity effects in Cu-doped KTa1−xNbxO3 crystal
    AIP Publishing ; 2014
    In:  Applied Physics Letters Vol. 105, No. 5 ( 2014-08-04)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 105, No. 5 ( 2014-08-04)
    Abstract: An abnormal laser deflection phenomenon in a copper-doped KTa1−xNbxO3 (Cu:KTN) crystal is demonstrated in this Letter. A near-50 mrad beam deflection angle was observed when a voltage of 1.2 kV was applied to a Cu:KTN block with size of 2.8 mm × 1.2 mm × 7.5 mm at room temperature. The special features of this deflection phenomenon are that the laser beam deflection direction is perpendicular to the electric field direction, and the beam deflection angle remains unchanged when the electric field direction is reversed. The operating principle of the phenomenon is investigated and the origin of the deflection phenomenon is attributed to an interaction between the graded refractivity effect and the quadratic electro-optic effect of the crystal.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4892663
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 7
    Online Resource
    Online Resource
    Correlation of oxygen vacancy and Jahn–Teller polarons in epitaxial perovskite SrMnO3 ultrathin films: Dielectric spectroscopy investigations
    AIP Publishing ; 2020
    In:  Applied Physics Letters Vol. 116, No. 14 ( 2020-04-06)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 116, No. 14 ( 2020-04-06)
    Abstract: Temperature-dependent dielectric spectroscopy was used to observe multiple dielectric responses involving four sets of dielectric relaxations (DRs) in molecular beam epitaxy-deposited ultrathin (001) SrMnO3/Nb:SrTiO3 heterojunctions. Two sets of oxygen-vacancy (OV)-related DRs, which were sensitive to oxygen annealing, were attributed to short-range OV hopping and localized Jahn–Teller (JT)-polaron hopping-induced dipolar-type relaxations. Arising from electron-phonon coupling between eg electrons and JT-distortion in Mn3+ ions, the appearance of JT-polarons was closely related to the presence of oxygen vacancies, which leads to transitions from Mn4+ to Mn3+.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.5145245
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2020
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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  • 8
    Online Resource
    Online Resource
    The Cr-substitution concentration dependence of the structural, electric and magnetic behaviors for Aurivillius Bi5Ti3FeO15 multiferroic ceramics
    AIP Publishing ; 2013
    In:  Journal of Applied Physics Vol. 114, No. 23 ( 2013-12-21)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 114, No. 23 ( 2013-12-21)
    Abstract: Aurivillius Bi5Ti3FeO15 (BTFO) multiferroic ceramics with different Cr-doped concentrations have been synthesized by the conventional solid state reaction method. The influences of Cr-doping concentrations on the structural, magnetic, dielectric, and ferroelectric properties of BTFO ceramics are investigated in detail. All these sintered Cr-substituted BTFO ceramics are determined to be layered perovskite Aurivillius structure by X-ray diffraction, as well as the lattice parameters a, b, and c are in good accordance with Vegard's law along with the Cr-doping concentration. The lattice distortion a/b for Aurivillius family decreases with increasing Cr-doping concentration. Moreover, Cr-doping can promote greatly the grain growth of BTFO samples confirmed from field emission scanning electron microscopy characterization. However, no obvious signs of the improvement in ferroelectric properties are found in Cr-doped BTFO ceramics, and abnormal ferroelectric polarization versus electric field (P-E) loops are observed as Cr-doping content is beyond 0.1. Similar ε (tanδ) versus frequency plots to those of the BTFO sample are exhibited when Cr-doping concentration is less than 0.1. Nevertheless, obvious dielectric dispersion phenomena are shown as the Cr-doping concentration is beyond 0.1, and this dispersion behavior becomes strong with further increasing Cr-doping concentration, which are clearly indicated by the appearance of dielectric loss relaxation peaks in the measurement frequency from 102 Hz to 106 Hz. In addition, the corresponding frequency to relaxation peak shifts towards high frequencies with the Cr-doping concentration. Finally, the same magnetic orderings for all these Cr-doped BTFO ceramics as those of the BTFO one, i.e., superparamagnetic state dominated with antiferromagnetic interaction, are unambiguously found, signifying that the predicted Fe3+-O-Cr3+ 180° ferromagnetic superexchange interaction based on the Goodenough-Kanamori (G-K) rule might not be achieved in BTFO ceramics through Cr substitution by the conventional solid state reaction.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4849055
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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