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Enhanced Antioxidation and Thermoelectric Properties of the Flexible Screen-Printed Bi2Te3 Films through Interface Modification
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-04-01 00:00:00 , DOI: 10.1021/acsaem.9b00178 Jingjing Feng 1 , Wei Zhu 1, 2 , Yuan Deng 1, 2 , Qingsong Song 3 , Qingqing Zhang 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-04-01 00:00:00 , DOI: 10.1021/acsaem.9b00178 Jingjing Feng 1 , Wei Zhu 1, 2 , Yuan Deng 1, 2 , Qingsong Song 3 , Qingqing Zhang 1
Affiliation
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With the advantages of easy processing and mass production, printing technologies to fabricate flexible thermoelectric films have received widespread scientific and technological interest. In this work, interface modification has been applied to effectively improve the loose porous intrinsic structure of screen-printed Bi2Te3 thermoelectric films, thus regulating the antioxidation and thermoelectric properties. Specifically, nanosolder is prepared and introduced into the screen-printing technique, which can modify the interface and thus enhance the electrical conductivity in the screen-printed film. Accordingly, a highest power factor of 3.63 μW cm–1 K–2 is obtained and the ZT over 0.2 is achieved in a wide temperature range from 300 to 460 K. Meanwhile, the role of the inert gas (N2) and the reducing atmosphere (Ar/H2, 5% H2 + 95% Ar) during the sintering process of screen-printed Bi2Te3 films is also revealed. The film with nanosolder sintered in N2 has excellent oxidation resistance through the interface modification of thiol molecules. However, the hydrogen atmosphere damages the antioxidation according to the gas-induced defect engineering. Through the introduction of nanosolder, the electrical resistivity change of the screen-printed film is just about 3.6% after being stored for 6 months in air, and it can withstand repeated bending for 1000 times (concave) or 600 times (convex) when the bending radius is as low as 20 mm. Our research provides an effective method for preparing high-quality flexible thermoelectric films and greatly facilitates the development of screen-printed flexible wearable thermoelectric devices.
中文翻译：
通过界面修饰增强丝网印刷Bi 2 Te 3柔性薄膜的抗氧化和热电性能
由于具有易于加工和大量生产的优点，用于制造柔性热电薄膜的印刷技术已受到广泛的科学和技术关注。在这项工作中，已应用界面改性来有效改善丝网印刷的Bi 2 Te 3热电薄膜的疏松多孔本征结构，从而调节抗氧化和热电性能。具体地，制备纳米焊料并将其引入到丝网印刷技术中，其可以改变界面并因此提高丝网印刷膜中的电导率。因此，最高功率因数为3.63μWcm –1 K –2获得和ZT超过0.2时在宽的温度范围从300至460 K.同时，惰性气体的作用（N达到2）和还原性气氛（氩/ H 2，5％H 2 + 95％Ar的）也揭示了丝网印刷Bi 2 Te 3膜的烧结过程。用N 2烧结的纳米焊料薄膜通过硫醇分子的界面改性具有出色的抗氧化性。然而，根据气体引起的缺陷工程，氢气氛破坏了抗氧化作用。通过引入纳米焊剂，丝网印刷薄膜在空气中存储6个月后的电阻率变化仅为3.6％，并且可以承受1000倍（凹）或600倍（凸）的反复弯曲。弯曲半径低至20毫米。我们的研究为制备高质量的柔性热电薄膜提供了一种有效的方法，极大地促进了丝网印刷柔性可穿戴热电器件的开发。
更新日期：2019-04-01
中文翻译：
通过界面修饰增强丝网印刷Bi 2 Te 3柔性薄膜的抗氧化和热电性能
由于具有易于加工和大量生产的优点，用于制造柔性热电薄膜的印刷技术已受到广泛的科学和技术关注。在这项工作中，已应用界面改性来有效改善丝网印刷的Bi 2 Te 3热电薄膜的疏松多孔本征结构，从而调节抗氧化和热电性能。具体地，制备纳米焊料并将其引入到丝网印刷技术中，其可以改变界面并因此提高丝网印刷膜中的电导率。因此，最高功率因数为3.63μWcm –1 K –2获得和ZT超过0.2时在宽的温度范围从300至460 K.同时，惰性气体的作用（N达到2）和还原性气氛（氩/ H 2，5％H 2 + 95％Ar的）也揭示了丝网印刷Bi 2 Te 3膜的烧结过程。用N 2烧结的纳米焊料薄膜通过硫醇分子的界面改性具有出色的抗氧化性。然而，根据气体引起的缺陷工程，氢气氛破坏了抗氧化作用。通过引入纳米焊剂，丝网印刷薄膜在空气中存储6个月后的电阻率变化仅为3.6％，并且可以承受1000倍（凹）或600倍（凸）的反复弯曲。弯曲半径低至20毫米。我们的研究为制备高质量的柔性热电薄膜提供了一种有效的方法，极大地促进了丝网印刷柔性可穿戴热电器件的开发。
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