碲化鉍系熱電薄膜發電元件於Epoxy/Silicone resin基板之設計與製作

Design and Fabrication of Bismuth-Telluride-Based Thin Film Thermoelectric Generators on Epoxy/Silicone Resin Substrates

江俊漢(Jyun-Han Jlang)

指導教授 ： 林昭任

國立中正大學/工學院/化學工程學系/碩士(2015年)

摘要

本研究主要利用電鍍法做出碲化鉍基熱電薄膜發電元件，使用刮塗法在不鏽鋼基材上製備聚苯乙烯球模板，並於常壓下電鍍具有三維結構的碲化鉍基熱電薄膜後，再進行同時熱壓退火和純粹退火的後處理。熱電元件在組裝時，不能直接應用於不鏽鋼上，必須以電絕緣性佳且熱傳導性較低的材料做為基材。而本實驗利用環氧樹酯和矽樹酯來對熱電薄膜進行轉移，並對於轉移成功率以及轉移後的熱電性質作探討。熱電薄膜發電元件之熱電性質與結構設計均會影響整體性能，本研究以不同的基材、熱電薄膜後處理，製作三種熱電薄膜發電器，並比較其性能。利用環氧樹酯為基材時，對於串聯1對和2對p-n對熱電薄膜以Ni做為導電電極進行電訊量測，冷熱端溫差為11K時，開路電壓為2.58/5.13mV、短路電流為75/25μA以及最大輸出功率為48/32nW；而利用矽樹酯做為基材時，冷熱端溫差為8K時，開路電壓為1.98/3.90mV、短路電流為70/24μA以及最大輸出功率為35/23nW，由研究結果得知，在相同熱源下，環氧樹酯能造成較大的溫度差，矽樹酯則較低，其原因為矽樹酯的熱傳導性較佳，容易造成熱損失。而在不同的結構設計，相同熱電薄膜截面積下，1對p-n對串聯之結構設計有較高的短路電流值與最大輸出功率值，而2對p-n對串聯對熱電薄膜則具有較高的開路電壓值。

關鍵字

碲化鉍基 ； 電沉積 ； 聚苯乙烯球模板 ； 熱電元件

並列摘要

This research are devoted to make Bismuth-Telluride-based alloy thin film thermoelectric generators fabricated by a electroplating method, the three-dimensional Bismuth-telluride-based alloy thin film prepared by potentiostatic electrodeposition technique onto three-dimensional polystyrene templates which were formed on stainless steel substrates via blade coating method, hot pressing-annealing method and pure annealing method was further treated. The thermoelectric generators assembly, cannot use directly on to the stainless steel, it must have great electrical insulating properties and low thermal conductivity of the material as a substrate. In this study, using an epoxy resin and silicone resin transfer thermoelectric films, and to explore the transfer success rate and thermoelectric properties after the transfer. The output power can also be affected by thermoelectric properties and structure design of the thermoelectric generators. This study produced three kinds of film thermoelectric generators with different substrates and post-treatment method, and the compare its performance. When the epoxy resin as a substrate, the open-circuit voltage of 2.58/5.13mV, short-circuit current of 75/25μA and estimated maximum output power of 48/32nW are obtained from 1 pair/2 pairs of legs connected by Ni electrodes and a temperature difference of ∆T=11K；When the silicone resin as a substrate, the open-circuit voltage of 1.98/3.90mV, short-circuit current of 70/24μA and estimated maximum output power of 35/23nW are obtained from 1 pair/2 pairs of legs connected by Ni electrodes and a temperature difference of ∆T=8K. The results found of different substrates film thermoelectric generator, in the same heat source, epoxy resin can cause a great temperature difference of ∆T=11K, the lower silicon resin of ∆T=8K, presumably due to the thermal conductivity of the silicon resin is preferably, likely to cause heat loss. In different designs, the same sectional area of the thermoelectric thin film, a single pair of p-n of the structural design of the series has a high short-circuit current value and the maximum output power value, and the two pairs of p-n to the series have a high open-circuit voltage value.

並列關鍵字

Bi2Te3-based ； Thermoelectric elements ； polystyrene template ； electrodeposition

參考文獻

膜熱電性質之研究」，2014，國立中正大學化學工程學系。

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