Influence of size disorder parameter on the thermophysical properties of rare‐earth‐zirconate medium‐entropy ceramics

Wei, Mingyue; Xu, Jie; Zhu, Jiatong; Yang, Runwu; Meng, Xuanyu; Zhang, Ping; Yang, Jinlong; Gao, Feng

doi:10.1111/jace.18875

Cited by 8 publications

(3 citation statements)

References 48 publications

(79 reference statements)

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“…13 (a). The overall trend of thermal conductivity is to increase with the rise of temperature, exhibiting a glass-like thermal conductivity [46]. Typically speaking, the thermal conductivity of a non-metallic ceramic usually decreases with the increase of temperature and it tends to stable at extremely high temperatures due to phonon scattering.…”

Section: J U S T a C C E P T E Dmentioning

confidence: 99%

Suppressing the phase transition of ZrP ₂O ₇ by defect and entropy regulation for high-temperature wave-transparent material application

Liu,

Tian,

Chen

et al. 2024

Journal of Advanced Ceramics

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Section: J U S T a C C E P T E Dmentioning

confidence: 99%

Suppressing the phase transition of ZrP ₂O ₇ by defect and entropy regulation for high-temperature wave-transparent material application

Liu,

Tian,

Chen

et al. 2024

Journal of Advanced Ceramics

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“…The oxygen vacancies vitally influence the generation of electrons and holes. Among all the rare-earth ions, the phosphors doped with Pr ions have a wide emission spectrum, from the ultraviolet (UV) to the mid-infrared (MIR) region, under UV and blue light excitation. − Hence, in the present study, Pr 3+ -doped SrCeO 3 perovskites were synthesized and employed as a spectral converter layer between the electron transport layer TiO 2 and the (CH 3 NH 3 ) 2 CuBr 4 active layer in hybrid PSCs.…”

Section: Introductionmentioning

confidence: 99%

Pr-Doped Inorganic SrCeO₃ Perovskite Nanophosphors as Activated Compact Layers for (CH₃NH₃)₂CuBr₄ Perovskite Solar Cells

Munirathnam,

Rajendra Menon

et al. 2024

ACS Appl. Opt. Mater.

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In this study, we report a modified architecture for perovskite solar cells (PSCs) by introducing a compact layer to modify the trap states between the semiconductor oxide (TiO 2 ) and the active perovskite layer, the latter of which can affect carrier transport, recombination, and charge collection in the devices. In the present work, less toxic copper-based organic (CH 3 NH 3 ) 2 CuBr 4 and rareearth (Pr 3+ ) ion-doped inorganic SrCeO 3 perovskites (compact layer) were synthesized by a solution-based method. The structural analysis confirmed that the organic and inorganic samples have perovskite phases. The morphological studies showed crystalline nanosheet structures and needle-like morphologies of organic and inorganic perovskites, respectively. From diffuse reflectance spectroscopy measurements, the band gaps of (CH 3 NH 3 ) 2 CuBr 4 and SrCeO 3 :Pr 3+ were found to be 1.81 and 3.3−3 eV, respectively. The X-ray photoelectron spectroscopy analysis suggested the coexistence of Pr 3+ and Pr 4+ ions in the sample, and photoluminescence studies showed that the emission of the Pr 3+ -doped inorganic perovskite phosphor extended to the red-light region, which was suitable for the absorption range of the (CH 3 NH 3 ) 2 CuBr 4 perovskite active layer. Hybrid (CH 3 NH 3 ) 2 CuBr 4 PSCs were fabricated using compact praseodymium (Pr 3+ )-ion-doped inorganic SrCeO 3 layers. Dark I−V measurements of the samples revealed the effects of the Pr 3+ concentration on defect passivation properties. The devices with Sr 1−x CeO 3 :xPr 3+ had an estimated reduced trap state density and further afforded a power conversion efficiency (PCE) of 1.15% with an open-circuit voltage of 0.92 V, a short-circuit current density of 1.58 mA, and a fill factor of 78.9%.

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“…Tunable blue-yellow and orange-red emissions from SrCeO 3 doped with samarium and dysprosium have been reported. 26 In the literature synthesis of SrCeO 3 by different methods such as co-precipitation, 27 spray pyrolysis, 28 spin coating, 29 combustion synthesis, 30 solid-state reaction, 31 sol-gel, 32 have been reported. Researchers have used fuels such as citric acid, urea, glycine, and others for the synthesis of SrCeO 3 through the combustion method.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive study of dielectric, modulus, impedance, and conductivity of SrCeO₃ synthesized by the combustion method

Verma,

Tripathi,

Upadhyay

2024

Int J Applied Ceramic Tech

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In this work, perovskite oxide SrCeO3 was synthesized using the solution combustion method (SCM). Synthesized samples have been characterized using X‐ray diffraction (XRD), Raman, ultra violet (UV)–visible spectroscopy, and scanning electron microscopy (SEM) techniques. The XRD and Rietveld refinement has confirmed the orthorhombic structure with space group Pnma. The average grain size of this ceramic sample is 1.2 µm. The dielectric constant, dissipation factor, modulus, impedance, and alternating current (AC) and direct current (DC) conductivities were analyzed in the temperature range RT to 600°C and frequency range 20 Hz–2 MHz. Further, it was observed that the role of grain boundaries in dielectric and electrical properties is significant, at low temperatures. The origin of the dielectric relaxation and conduction process is the same. The activation energy for DC conduction (Edc) was found to be .79 eV. Electrical conduction/relaxation is assigned to the diffusion of doubly ionized oxygen (Vo··). The value of DC conductivity (1.2 × 10−3 Ω−1 cm−1 at 600°C) and activation energy of .79 eV is very close to the values reported for doped CeO2‐based oxide ion conductors for SOFCs. This study has demonstrated that SrCeO3 can be an alternative candidate for the oxide ion conductor electrolyte application and the potential to be used as a thermally stable capacitor application for microwave dielectric applications.

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Influence of size disorder parameter on the thermophysical properties of rare‐earth‐zirconate medium‐entropy ceramics

Cited by 8 publications

References 48 publications

Suppressing the phase transition of ZrP ₂O ₇ by defect and entropy regulation for high-temperature wave-transparent material application

Suppressing the phase transition of ZrP ₂O ₇ by defect and entropy regulation for high-temperature wave-transparent material application

Pr-Doped Inorganic SrCeO₃ Perovskite Nanophosphors as Activated Compact Layers for (CH₃NH₃)₂CuBr₄ Perovskite Solar Cells

A comprehensive study of dielectric, modulus, impedance, and conductivity of SrCeO₃ synthesized by the combustion method

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Influence of size disorder parameter on the thermophysical properties of rare‐earth‐zirconate medium‐entropy ceramics

Cited by 8 publications

References 48 publications

Suppressing the phase transition of ZrP 2O 7 by defect and entropy regulation for high-temperature wave-transparent material application

Suppressing the phase transition of ZrP 2O 7 by defect and entropy regulation for high-temperature wave-transparent material application

Pr-Doped Inorganic SrCeO3 Perovskite Nanophosphors as Activated Compact Layers for (CH3NH3)2CuBr4 Perovskite Solar Cells

A comprehensive study of dielectric, modulus, impedance, and conductivity of SrCeO3 synthesized by the combustion method

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Suppressing the phase transition of ZrP ₂O ₇ by defect and entropy regulation for high-temperature wave-transparent material application

Suppressing the phase transition of ZrP ₂O ₇ by defect and entropy regulation for high-temperature wave-transparent material application

Pr-Doped Inorganic SrCeO₃ Perovskite Nanophosphors as Activated Compact Layers for (CH₃NH₃)₂CuBr₄ Perovskite Solar Cells

A comprehensive study of dielectric, modulus, impedance, and conductivity of SrCeO₃ synthesized by the combustion method