Hybride organisch‐anorganische thermoelektrische Materialien und Baueinheiten

Jin, Huile; Li, Jun; Iocozzia, James; Zeng, Xin; Wei, Pai‐Chun; Yang, Chao; Li, Nan; Liu, Zhaoping; He, Jr Hau; Zhu, Tiejun; Wang, Jichang; Lin, Zhiqun; Wang, Shun

doi:10.1002/ange.201901106

Cited by 13 publications

(5 citation statements)

References 117 publications

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“…Typically, thermoelectric devices have been so far based on inorganic compounds, but also hybrid (organic-inorganic) TE materials have recently attracted the attention of many, in both the academic and industrial fields [ 5 , 6 , 7 , 8 , 9 ]. Indeed, considering the exponential increase in energy consumption, the possibility to recover electrical energy directly from lower-temperature waste heat using hybrid materials may represent a crucial advantage over inorganic ones [ 10 ]. Moreover, TE devices fed by the heat produced during metabolic processes are considered today a promising energy source for wearable electronics [ 1 ], such as fitness trackers, smartwatches, and medical sensors.…”

Section: Introductionmentioning

confidence: 99%

Long-Term Stability of TiS2–Alkylamine Hybrid Materials

et al. 2022

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Layered TiS2 intercalated with linear alkylamines has recently attracted significant interest as a model compound for flexible n-type thermoelectric applications, showing remarkably high power factors at room temperature. The thermal and, particularly, environmental stability of such materials is, however, a still an open challenge. In this paper, we show that amine-intercalated TiS2 prepared by a simple mechanochemical process is prone to chemical decomposition through sulfur exsolution, and that the presence of molecular oxygen is likely to mediate the decomposition reaction. Through computational analysis of the possible reaction pathways, we propose that Ti-N adducts are formed as a consequence of amine groups substituting for S vacancies on the internal surfaces of the S-Ti-S layers. These findings provide insights for possible future applications of similar hybrid compounds as devices operating in ambient conditions, and suggest isolating them from atmospheric oxygen.

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Section: Introductionmentioning

confidence: 99%

Long-Term Stability of TiS2–Alkylamine Hybrid Materials

et al. 2022

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“…The technical advantages of photoacoustic spectroscopy have been used in determining optical spectra of semiconducting nanowires, , quantum dots, , and other challenging structures, including powdered or amorphous materials, fluorescent compounds, 2D layered semiconductors, − or biological samples . In addition, time- and frequency-resolved measurements of the photoacoustic signal can also be used to obtain thermal and carrier transport properties of materials, including thermal diffusivity and conductivity, nonradiative lifetimes, and carrier diffusion coefficient. , Recent advances in contactless determination of thermal conductivity by means of photoacoustic and photothermal methods − pave the way for further studies of emerging electronic nanostructures − and thermoelectric materials. − …”

Section: Results and Discussionmentioning

confidence: 99%

Optical Properties of In_2xGa_2–2xO₃ Nanowires Revealed by Photoacoustic Spectroscopy

Zelewski

Zhou

et al. 2019

ACS Appl. Mater. Interfaces

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Group III oxides, such as In 2 O 3 and Ga 2 O 3 , have proved to be good candidates as active materials for novel electronic devices, including high-mobility transistors, gas sensors, and UV photodetectors. The ability to tune optical and electronic properties is provided by alloying In 2x Ga 2−2x O 3 (InGaO) in a broad compositional range. Further development of InGaO compounds in the form of nanowires (NWs) would overcome the technological limitations, such as the substrate crystal lattice mismatch and the inability to fabricate high quality structures above the critical thickness. In this work, optical properties of alloyed InGaO NWs in a wide compositional range are carefully assessed. Unlike classical optical characterization methods, photoacoustic spectroscopy reveals the fundamental absorption edge despite the strong light scattering in porous and randomly oriented nanowires structure. An unusual compositional band gap dependence is also observed, giving insight into the phase segregation effect and increased quality of mixed NWs. In addition, photoacoustic measurements disclose potential applications of InGaO NWs in remote, light-driven loudspeakers because of intense photoacoustic effect in nanowire ensembles in this material system.

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“…These thermodynamic routes have demonstrated their efficacy in a wide range of thermoelectric materials and provided new perspectives, e.g., the interplay between short‐range disorder and high‐symmetry long‐range order in high‐entropy materials, the precise control of compositions, phase stability, and microstructures via phase‐boundary mapping, and the dual hybridity in crystal structure and electrical conduction in liquid‐like thermoelectric materials. These results, along with the light shed by novel organic–inorganic hybrids and new degrees of freedom in transport properties,114,115 beckon to a multidisciplinary community to develop next‐generation thermoelectric materials.…”

Section: Discussionmentioning

confidence: 96%

Thermodynamic Routes to Ultralow Thermal Conductivity and High Thermoelectric Performance

Wei

Liao

et al. 2020

Advanced Materials

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Thermoelectric (TE) research is not only a course of materials by discovery but also a seedbed of novel concepts and methodologies. Herein, the focus is on recent advances in three emerging paradigms: entropy engineering, phase‐boundary mapping, and liquid‐like TE materials in the context of thermodynamic routes. Specifically, entropy engineering is underpinned by the core effects of high‐entropy alloys; the extended solubility limit, the tendency to form a high‐symmetry crystal structure, severe lattice distortions, and sluggish diffusion processes afford large phase space for performance optimization, high electronic‐band degeneracy, rich multiscale microstructures, and low lattice thermal conductivity toward higher‐performance TE materials. Entropy engineering is successfully implemented in half‐Huesler and IV–VI compounds. In Zintl phases and skutterudites, the efficacy of phase‐boundary mapping is demonstrated through unraveling the profound relations among chemical compositions, mutual solubilities of constituent elements, phase instability, microstructures, and resulting TE properties at the operation temperatures. Attention is also given to liquid‐like TE materials that exhibit lattice thermal conductivity at lower than the amorphous limit due to intensive mobile ion disorder and reduced vibrational entropy. To conclude, an outlook on the development of next‐generation TE materials in line with these thermodynamic routes is given.

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Hybride organisch‐anorganische thermoelektrische Materialien und Baueinheiten

Cited by 13 publications

References 117 publications

Long-Term Stability of TiS2–Alkylamine Hybrid Materials

Long-Term Stability of TiS2–Alkylamine Hybrid Materials

Optical Properties of In_2xGa_2–2xO₃ Nanowires Revealed by Photoacoustic Spectroscopy

Thermodynamic Routes to Ultralow Thermal Conductivity and High Thermoelectric Performance

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Hybride organisch‐anorganische thermoelektrische Materialien und Baueinheiten

Cited by 13 publications

References 117 publications

Long-Term Stability of TiS2–Alkylamine Hybrid Materials

Long-Term Stability of TiS2–Alkylamine Hybrid Materials

Optical Properties of In2xGa2–2xO3 Nanowires Revealed by Photoacoustic Spectroscopy

Thermodynamic Routes to Ultralow Thermal Conductivity and High Thermoelectric Performance

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Optical Properties of In_2xGa_2–2xO₃ Nanowires Revealed by Photoacoustic Spectroscopy