摩擦電能量收集元件內表面圓頂型微奈米結構之綜合研究分析

Abstract

在本論文中利用曝光微影技術(photolithography)和乾濕蝕刻(dry and wet etching)做出金字塔凹槽陣列矽基板之後，透過對聚二甲基矽氧烷(polydimethylsioxane, PDMS)翻模，可在PDMS表面形成金字塔陣列結構，以及利用曝光微影技術(photolithography)、乾蝕刻(dry and etching)和電漿輔助化學氣相沈積(plasma enhanced chemical vapor deposition)做出圓頂型陣列矽基板之後，透過對聚二甲基矽氧烷(polydimethylsioxane, PDMS)翻模，可在PDMS表面形成圓頂型凹槽陣列結構，接續對圓頂型凹槽陣列結構進行二次翻模，可得到在PDMS表面形成圓頂型陣列結構，並將兩種不同形狀的PDMS作為摩擦電層(triboelectric layer)，同時再利用電子鎗真空蒸鍍系統在矽基板鍍上銀(Ag)作為上下金屬電極，而上電極同時也作為摩擦電層，將其組裝後，製做出摩擦電能量收集元件(triboelectric energy harvester, TEH)。在PDMS摩擦電層中，製作了兩種不同形狀的摩擦電層(triboelectric layer)，第一種為底邊圓直徑尺寸的圓頂型陣列：22μm，其圓頂型間距為10μm，第二種為底邊長尺寸的金字塔型陣列：20μm，其金字塔間距為10μm。當圓頂型與金字塔型做量測比較時，並給予相同且未達飽和的壓力(saturation pressure)時，圓頂型元件量到的開路電壓(open-circuit voltage)和短路電流(short-circuit current)會大於金字塔型元件，因此，透過改變表面形狀的方式，可得到較佳的電壓及電流輸出。

In this thesis, we made the silicon substrate with the trench pyramid array on the surface by the ways of photolithography, dry etching, and wet etching. After the replica-modeling process, pyramid array structures could be formed on the interfacial layer of PDMS, and the use of exposure photolithography, dry and etching and plasma enhanced chemical vapor deposition to make a dome array silicon substrate, PDMS surface to form a dome-shaped groove array structure, continuous dome-shaped groove array structure of the second mold, can be formed in the PDMS surface dome array structure, and two different shapes of PDMS as a triboelectric layer, while the use of Electron gun vacuum evaporation system in the silicon substrate plating silver as the upper and lower metal electrodes, and the upper electrode as a triboelectric layer, will be assembled to make a triboelectric energy harvester (TEH). In the PDMS triboelectric layer, two different types of triboelectric layers were fabricated. The first is a dome-shaped array with a bottom-diameter diameter: 22 μm, a dome-type pitch of 10 μm, a second the pyramid-shaped array with a long side of the base is 20 μm and its pyramid spacing is 10 μm. When the dome type is compared with the pyramid type and the same saturation pressure is given, the open-circuit voltage and the short-circuit current of the dome type component Current will be greater than the pyramid-type components, therefore, by changing the surface shape of the way, can be a better voltage and current output.