A Novel Approach to Synthesize Lanthanum Telluride Thermoelectric Thin Films in Ambient Conditions

2013 ◽  
Vol 1543 ◽  
pp. 113-118 ◽  
Author(s):  
Su (Ike) Chih Chi ◽  
Stephen L. Farias ◽  
Robert C. Cammarata
Keyword(s):  
Thin Films ◽  
High Performance ◽  
Phonon Scattering ◽  
Functional Materials ◽  
Ambient Conditions ◽  
Thermoelectric Efficiency ◽  
Environment Friendly ◽  
Novel Approach ◽  
Thermoelectric Thin Films ◽  
Surface Morphologies

ABSTRACTRare-earth telluride compounds are characterized by their high performance thermoelectric properties that have been applied to the development of functional materials [1]. Recently, May and co-workers reported that nanostructured bulk lanthanum telluride (La3-xTe4, 0 ≤ x ≤ 1/3) by mechanical ball-milling exceeded the figure of merit (ZT) of 1 at high temperatures near 1300K [2-3]. Since the increased thermoelectric efficiency of nanostructured materials is due to the enhancement of phonon scattering introduced by quantum confinement, thin films have also generated significant scientific and technological interest [4-6]. Here, we report on the electrodepostion of lanthanum telluride and lanthanum thin films in ionic liquids in ambient conditions. Surface morphologies varied from needle-like to granular structures and depend on deposition conditions. This novel electrochemical synthesis approach is a simple, inexpensive and laboratory-environment friendly method of synthesizing nanostructured thermoelectric materials.

In-situ growth of high-performance (Ag, Sn) co-doped CoSb3 thermoelectric thin films

2021 ◽  
Author(s):  
Zhuang-Hao Zheng ◽  
Jun-Yun Niu ◽  
Dong-Wei Ao ◽  
Bushra Jabar ◽  
Xiao-Lei Shi ◽  
...  
Keyword(s):  
Thin Films ◽  
High Performance ◽  
In Situ Growth ◽  
Thermoelectric Thin Films ◽  
Co Doped

scholarly journals Improved Morphology of Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate) Thin Films for All-Electrospray-Coated Organic Photovoltaic Cells

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yingjie Liao ◽  
Takeshi Fukuda ◽  
Norihiko Kamata
Keyword(s):  
Thin Films ◽  
High Performance ◽  
Photovoltaic Cells ◽  
Spray Coating ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells ◽  
Ambient Conditions ◽  
Deposition Parameters ◽  
Coating Methods ◽  
Organic Devices

Spray coating technique has been established as a promising substitute for the traditional coating methods in the fabrication of organic devices in many reports recently. Control of film morphology at the microscopic scale is critical if spray-coated devices are to achieve high performance. Here we investigate electrospray deposition protocols for the fabrication of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films with a single additive system under ambient conditions at room temperature. Critical deposition parameters including solution composition, applied voltage, and relative humidity are discussed systematically. Optimized process for preparing homogenous PEDOT:PSS thin films is applied to all-electrospray-coated organic photovoltaic cells and contributes to a power conversion efficiency comparable to that of the corresponding all-spin-coated device.

High-performance zinc antimonide thermoelectric thin films achieved by a layer-by-layer combination reaction approach

2020 ◽  
Vol 31 (19) ◽  
pp. 16968-16974
Author(s):  
Zhuang-hao Zheng ◽  
Dong Yang ◽  
Xiao-lan Huang ◽  
Fu Li ◽  
Yue-Xing Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
High Performance ◽  
Layer By Layer ◽  
Zinc Antimonide ◽  
Thermoelectric Thin Films

scholarly journals Solvothermal synthesis of n-type Bi2(SexTe1−x)3 nanoplates for high-performance thermoelectric thin films on flexible substrates

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yuki Kimura ◽  
Ryotaro Mori ◽  
Susumu Yonezawa ◽  
Hayato Yabuki ◽  
Hiromasa Namiki ◽  
...  
Keyword(s):  
Thin Films ◽  
Solvothermal Synthesis ◽  
High Performance ◽  
Flexible Substrates ◽  
Thermoelectric Thin Films

Giant piezoelectricity in oxide thin films with nanopillar structure

Science ◽  
2020 ◽  
Vol 369 (6501) ◽  
pp. 292-297
Author(s):  
Huajun Liu ◽  
Haijun Wu ◽  
Khuong Phuong Ong ◽  
Tiannan Yang ◽  
Ping Yang ◽  
...  
Keyword(s):  
Thin Films ◽  
High Performance ◽  
Piezoelectric Materials ◽  
Functional Materials ◽  
Perovskite Oxide ◽  
Piezoelectric Response ◽  
Chemical Compositions ◽  
Oxide Thin Films ◽  
Sensors And Actuators ◽  
Local Heterogeneity

High-performance piezoelectric materials are critical components for electromechanical sensors and actuators. For more than 60 years, the main strategy for obtaining large piezoelectric response has been to construct multiphase boundaries, where nanoscale domains with local structural and polar heterogeneity are formed, by tuning complex chemical compositions. We used a different strategy to emulate such local heterogeneity by forming nanopillar regions in perovskite oxide thin films. We obtained a giant effective piezoelectric coefficient d33,f* of ~1098 picometers per volt with a high Curie temperature of ~450°C. Our lead-free composition of sodium-deficient sodium niobate contains only three elements (Na, Nb, and O). The formation of local heterogeneity with nanopillars in the perovskite structure could be the basis for a general approach to designing and optimizing various functional materials.

Flexible n-Type High-Performance Thermoelectric Thin Films of Poly(nickel-ethylenetetrathiolate) Prepared by an Electrochemical Method

2016 ◽  
Vol 28 (17) ◽  
pp. 3351-3358 ◽  
Author(s):  
Yuanhui Sun ◽  
Lin Qiu ◽  
Liangpo Tang ◽  
Hua Geng ◽  
Hanfu Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrochemical Method ◽  
High Performance ◽  
Thermoelectric Thin Films

scholarly journals Thermal Conductivity and Phonon Scattering Processes of ALD Grown PbTe–PbSe Thermoelectric Thin Films

2019 ◽  
Vol 29 (46) ◽  
pp. 1904073 ◽  
Author(s):  
Mallory E. DeCoster ◽  
Xin Chen ◽  
Kai Zhang ◽  
Christina M. Rost ◽  
Eric R. Hoglund ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Conductivity ◽  
Phonon Scattering ◽  
Thermoelectric Thin Films

scholarly journals Realizing a 14% single-leg thermoelectric efficiency in GeTe alloys

2021 ◽  
Vol 7 (19) ◽  
pp. eabf2738
Author(s):  
Zhonglin Bu ◽  
Xinyue Zhang ◽  
Bing Shan ◽  
Jing Tang ◽  
Hongxia Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Figure Of Merit ◽  
High Efficiency ◽  
Phonon Scattering ◽  
Waste Heat ◽  
Chemical Diffusion ◽  
Thermoelectric Device ◽  
Thermoelectric Efficiency ◽  
Good Service ◽  
Thermoelectric Figure

GeTe alloys have recently attracted wide attention as efficient thermoelectrics. In this work, a single-leg thermoelectric device with a conversion efficiency as high as 14% under a temperature gradient of 440 K was fabricated on the basis of GeTe-Cu2Te-PbSe alloys, which show a peak thermoelectric figure of merit (zT) > 2.5 and an average zT of 1.8 within working temperatures. The high performance of the material is electronically attributed to the carrier concentration optimization and thermally due to the strengthened phonon scattering, the effects of which all originate from the defects in the alloys. A design of Ag/SnTe/GeTe contact successfully enables both a prevention of chemical diffusion and an interfacial contact resistivity of 8 microhm·cm2 for the realization of highly efficient devices with a good service stability/durability. Not only the material’s high performance but also the device’s high efficiency demonstrated the extraordinariness of GeTe alloys for efficient thermoelectric waste-heat recovery.

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