本論文題目為「透過突出式結構增強染料敏化太陽能電池和有機光偵測器的效能研究」。本研究著重於開發奈米級厚度的網格，並將其應用於光電元件。利用黃光微影、濺鍍以及舉離製程製造出二氧化鈦(TiO2)及氧化銦錫( ITO)網格，並分別應用於染料敏化太陽能電池(dye-sensitized solar cell, DSSC)以及有機光偵測器(organic photodetector, OPD)。TiO2和ITO網格的突出結構不僅增加了光電極的表面面積，還提供了定向的電荷傳輸通路。這些突起結構大幅提升了 DSSC 和 OPD 的光電轉換效率、反應速度和穩定性，因此在光電應用方面展現出廣大的潛力。
第一項研究重點在於使用奈米級厚度的TiO2 網格結構來增強 DSSC 的光電轉換效率。奈米級厚度的TiO2網格為突出結構。突出結構增加染料分子與 TiO2之間的接觸面積，並建立定向電子傳輸通路。實驗結果顯示，引入TiO2突出結構可有效提升DSSC的光電轉換效率。TiO2突出結構是利用黃光微影、濺鍍及舉離技術製程，因此具有成本低以及製程簡單的優點。因此TiO2突出結構是開發高效率太陽能電池的絕佳設計之一。
第二項研究重點在於使用奈米級厚度的ITO網格結構來增強OPD 的明暗電流比。奈米級厚度的 ITO 網格為突出結構。此結構增加了 OPD 中 TiO2層、主動層和鋁層的表面面積和提供定向的電荷傳輸通道，有助於電子和電洞的傳輸。與沒有 ITO 突出結構的 OPD 相比，具有突出結構的 OPD 有較大的光電流密度和較小的暗電流密度。另外，有ITO突出結構的 OPD 比沒有ITO突出結構的 OPD具有更高的光暗電流比，所以在具有 ITO 突出結構的 OPD 擁有更快的反應時間、更寬的頻率響應範圍和更久的長期穩定性。因此，具有 ITO 突起結構的 OPD 在發展光通訊、環境監控及生物醫學成像方面具有極大的潛力。

This thesis is entitled “Performance Enhancement of Dye-Sensitized Solar Cells and Organic Photodetectors Through Protrusive Structures.” The study focuses on developing nanometer-thick grids and applying them to optoelectronic devices. TiO2 and ITO grids were fabricated using photolithography, sputtering, and lift-off processes, and applied to dye-sensitized solar cells (DSSCs) and organic photodetectors (OPDs), respectively. The protrusive structures of the TiO2 and ITO grids not only increase the surface areas of photoelectrodes but also provide directional charge transport pathways. These protrusive structures significantly enhance the power conversion efficiencies, response speeds, and stabilities of the DSSCs and OPDs, so demonstrate broad potential for optoelectronic applications.
The first work focuses on the enhancement of the efficiency of a DSSC using a nanometer-thick TiO2 grid. The nanometer-thick TiO2 grid has a TiO2 protrusive structure. The TiO2 protrusive structure facilitates the contact of dye molecules and TiO2, and creates directional electron transport pathways. Experimental results show that introducing the TiO2 protrusive structure effectively enhances the power conversion efficiency of the DSSC. The TiO2 protrusive structure was fabricated using photolithography, sputtering, and lift-off techniques, so has the advantages of low cost and simple process. TiO2 protrusive structures are an excellent design for developing high-efficiency solar cells.
The second work focuses on the enhancement of the light-to-dark current ratio of a OPD using a nanometer-thick ITO grid. The nanometer-thick ITO gird has a protrusive structure. This structure increases the surface areas and directional charge transport channels of the TiO2 layer, active layer, and aluminum layer in the OPD, facilitating the transportation of the electrons and holes. The OPD with the protrusive structure has a larger photocurrent density and smaller dark current density than a OPD without a ITO protrusive structure. As a result, the OPD with the protrusive structure exhibits a higher light-to-dark current ratio than the OPD without a ITO protrusive structure. In addition, the OPD with the ITO protrusive structure exhibits a faster response time, wider frequency response range, and higher long-term stability. Therefore, the OPD with the ITO protrusive structure has great potential for developing optical communication, environmental monitoring, and biomedical imaging.

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