Thermoelectric Properties of Al‐Doped Mesoporous ZnO Thin Films

Hong, Min Hee; Park, Chang-Sun; Seo, Won‐Seon; Lim, Young Soo; Lee, Jung‐Kun; Park, Hyung Ho

doi:10.1155/2013/131537

Cited by 14 publications

(6 citation statements)

References 19 publications

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“…That means with a temperature difference of 68 K, a V oc of 3.4 mV and a I sc of 0.24 mA is achieved, and an electrical power of 0.2 µW is generated with a flexible and textile TEG. Applying equation ( 1), these measurements result in an average Seebeck coefficient for AZO of 30 or 50 µV K −1 , dependent on the deposition temperatures of 225 • C and 180 • C. These values are in line with the literature dependent on terms of manufacture [32][33][34]. Figure 2(B) shows the calculated values for |α| in relation to the applied temperature difference dT.…”

Section: Te Generator-determination Of Seebeck Coefficientsupporting

confidence: 82%

3D spacer fabrics for thermoelectric textile cooling and energy generation based on aluminum doped zinc oxide

Schmidl

Gawlik

Jia

et al. 2020

Smart Mater. Struct.

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It is demonstrated that spacer fabrics made of polyester can be coated with Al-doped ZnO (AZO) as thermoelectric (TE) material and conductive silver as contact material to enable smart textiles. An atomic layer deposition process was used for the AZO coating and the conductive silver paste was manually applied. A TE generator and cooling based on the Seebeck and Peltier effect can be observed if a temperature difference or direct current is applied, respectively. Both effects were proven to exist and evaluated. The Seebeck coefficient was determined of up to 50 µV · K−1 and a TE power of about 0.2 µW was generated. Without additional active heat dissipation or cooling, a temperature difference between both spacer fabric surfaces of up to 12 K was achieved. By changing the polarity of the electrical contacts it can significantly be shown that the cold-warm side is changed, as expected for a Peltier element. We observed experimentally the Peltier effect using a single element as well as electrically interconnected sample pairs, the latter could be important for the cooling application. Additionally, the heat transport through the spacer fabrics was tested and showed that there is no heat equalization between the surfaces via air and filaments at temperatures up to 50 °C. The Peltier effect as a fundamental TE effect, that enables site-specific and on-demand cooling applications, has not yet been comprehensively investigated using spacer fabrics and AZO as TE material. These investigations predict that AZO on spacer fabrics hold the special potential to enable flexible and textile solid-state cooling applications.

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Section: Te Generator-determination Of Seebeck Coefficientsupporting

confidence: 82%

3D spacer fabrics for thermoelectric textile cooling and energy generation based on aluminum doped zinc oxide

Schmidl

Gawlik

Jia

et al. 2020

Smart Mater. Struct.

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“…The nanoflowers consist of nanorods and it is well known that the electron transport rate in one‐dimensional semiconductor nanostructures (1D nanorods or nanowires) is faster than that of the semiconductor nanoparticles …”

Section: Resultsmentioning

confidence: 99%

Morphological characterization of aluminum‐doped zinc oxide nanomaterials (AZO) for dye‐sensitized solar cells

Ekmekci

Ela

Erten-Ela

2018

Int J Applied Ceramic Tech

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In this work, aluminum-doped ZnO (AZO, Al:ZnO) nanocomposite materials were prepared by a simple hydrothermal method using the microwave oven. Zinc oxide nanostructures were doped with aluminum in different dopant concentrations (0.5%, 1.0%, 1.5% and 2.0%). AZO materials were analyzed using XRD, SEM and EDX measurements. Also dye-sensitized solar cell (DSSC) performances of AZOs were investigated. The scanning electron microscopy (SEM) analysis confirms that the synthesized AZO nanomaterials were nanorods and nanoplates in shape and have 200 nm to 974 nm sizes in length and 116.1-269.5 nm in diameters (shown Figure 4-5). Dye-sensitized solar cell efficiencies are higher in 0.5% and 1% AZO nanorod materials. We have found the maximum efficiency as 1.94% for 1% doped AZO nanorod materials. K E Y W O R D Saluminum-doped ZnO, AZO, dye-sensitized solar cell, morphology

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“…The fact that the Seebeck coefficient values are always negative over the whole temperature range and for all of the samples which demonstrates that the semiconductor in question is of the n-type kind, which has electrons as the predominant form of charge carrier. [15,25,26]. Figure 5 makes it abundantly evident that there is a correlation between a rise in temperature and an increase in the absolute values of [18].The has a correlation that is inversely proportional to the number of carriers.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Thermoelectric Performance in n-type Al-doped ZnO in the Form of (Zn1-x Alx)O

Ghazi,

Kadhim

2023

JK-Physics

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Compositions of (Zn1-xAlx)O were synthesized via the Solid-state reaction (SSR) technique at 1000 oC , with x ranging from 0.0005 to 0.03. After the preparation of the sample, the structure and thermoelectric properties were examined by XRD, SEM, and EDX and the home-built equipment, respectively. All the samples are observed to be polycrystalline and hexagonal structures. The composition with ( x= 0.015), i.e. (ZnO0.985Al0.015), exhibited the highest electrical conductivity values of 5500 S/m at 580 K. As well as for the Seebeck coefficient, it was discovered that the composition (ZnO0.98Al0.02) ) had the highest values of 400 mv/K at 680. The power factor (PF) for the composition with the formula ( ZnO0.98Al0.02)) was found to have the most outstanding possible value of 1300 mw/mK2 at 850 K.

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Thermoelectric Properties of Al‐Doped Mesoporous ZnO Thin Films

Cited by 14 publications

References 19 publications

3D spacer fabrics for thermoelectric textile cooling and energy generation based on aluminum doped zinc oxide

3D spacer fabrics for thermoelectric textile cooling and energy generation based on aluminum doped zinc oxide

Morphological characterization of aluminum‐doped zinc oxide nanomaterials (AZO) for dye‐sensitized solar cells

Enhanced Thermoelectric Performance in n-type Al-doped ZnO in the Form of (Zn1-x Alx)O

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