Organic-inorganic Thermoelectric Material for a Printed Generator
Organic-inorganic Thermoelectric Material for a Printed Generator
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用于印刷发电机的有机-无机热电材料
DOI：
10.1088/1742-6596/1052/1/012008
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Koji Miyazaki
中科院分区：
文献类型：
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作者：
Kunihisa Kato;Kou Kuriyama;Tomohide Yabuki;Koji Miyazaki
我们用丝网印刷的方法制作了一个微型热电发电机。亚毫瓦电功率是在60 ℃的加热板上产生的。将Bi 2 Te 3粒子与聚酰亚胺复合，并加入离子液体制成印刷油墨。将印刷的复合膜在氩气和氢气中在400 ℃下退火1小时以改善热电性能。Bi 2 Te 3粒子的粒径约为1-2 μm，粒子间填充有聚酰亚胺和离子液体。通过在测量塞贝克电压的同时沿面内方向施加沿着温度差来测量膜的塞贝克系数。电导率用四探针法测定。用微分3ω法测量了材料的跨面导热系数。测得p型热电薄膜的塞贝克系数为245μV/K，电导率为160 S/cm，热导率为0.33 W/（m· K）。n型的Seebeck系数为-165 μV/K，电导率为140 S/cm，热导率为0.23 W/（m· K）。薄膜的无量纲优值p型为0.87，n型为0.5。这些热电性能比Bi 2 Te 3与PEDOT：PSS复合材料的热电性能有很大提高.高热电性能是通过复合材料极低的热导率实现的。p型和n型薄膜的热导率均低于聚酰亚胺薄膜。
We made a thermoelectric mini-generator by a screen printing method. The sub-milliwatt electric power was generated on a heated plate at 60 C. The composite of Bi 2 Te 3 particles and polyimide with ionic-liquid was made as an ink for printing. The printed composite film was annealed at 400 C for 1 hour in Argon with hydrogen to improve the thermoelectric properties. The diameter of the Bi 2 Te 3 particles was about 1-2 μm and polyimide with ionic-liquid was filled between the particles. The Seebeck coefficient of the film was measured by applying a temperature difference along the in-plane direction while measuring the Seebeck voltage. The electrical conductivity was measured by four-point probe method. The cross-plane thermal conductivity was measured by differential 3ω method. The measured Seebeck coefficient of p-type thermoelectric film was 245μV/K, the electrical conductivity was 160 S/cm, and the thermal conductivity was 0.33 W/(m· K). The Seebeck coefficient, the electrical conductivity and thermal conductivity for n-type was-165μV/K, 140 S/cm, and 0.23 W/(m· K), respectively. The non-dimentional figure of merit of the film is 0.87 for p-type, and 0.5 for n-type. Those thermoelectric properties were much improved than those of Bi 2 Te 3 with PEDOT: PSS composite. The high thermoelectric properties are achieved by extremely low thermal conductivity of the composites. The thermal conductivities of both p-type and n-type films were lower than that of polyimide film.