在能源議題中，如何獲得低碳排能源的研究一直都是不可忽略的大方向，而作為幾乎零碳排的綠氫燃料電池也是各個研究者們的研究方向。
綠氫燃料電池是一種燃料為氫的電池，具有穩定提供電力以及碳排放極低的優點，而且該氫氣是藉由光電化學水分解所產生的[1]，所以綠氫燃料電池是一種製造與使用時的碳排放量都很少的能源，在需要綠能的未來上勢必會佔有一席之地。而光電化學水分解是一種利用光源照射光觸媒進而將水分解成氫氣及氧化的化學反應，所以光觸媒的材料選擇就顯得十分的重要。
本實驗中，我們使用脈衝雷射沉積系統，在基板上沉積出鈧鎵氮氧化物，並且根據成長時的氣體濃度與種類(氮與氧)來改變其氮氧比。再來將樣品進行結構量測、元素分析以及光電化學反應等量測。最後經由量測發現，在高氮壓力環境下成長的樣品在光電化學水分解上確實具有較高的產氫量，其產氫量最多可以是其他參數樣品產氫量的11倍。這使得鈧鎵氮氧化物有潛力成為綠能材料的選擇之一

In the context of energy issues, research on obtaining low-carbon emission energy sources has always been an essential focus. One of the directions that researchers have been exploring is green hydrogen fuel cells, which emit virtually zero carbon.
Green hydrogen fuel cells are a type of fuel cell that uses hydrogen as fuel. It possesses the advantages of providing stable electrical power and minimal carbon emissions. The hydrogen used in these fuel cells is generated through photocatalytic water splitting, making it an energy source with minimal carbon emissions both in production and use. In the future, with the growing demand for green energy, green hydrogen fuel cells are expected to play a significant role. Photocatalytic water splitting is a chemical process that utilizes a light source to irradiate a photocatalyst, thereby splitting water into hydrogen and oxygen. Therefore, the choice of photocatalyst material is crucial.
In this experiment, we used a pulsed laser deposition system to deposit scandium gallium oxynitride on a substrate, varying the nitrogen-oxygen ratio based on the gas concentration and type (nitrogen and oxygen) during growth. Subsequently, we conducted structural measurements, element analysis, and relevant measurements related to photocatalysis. Finally, the measurements revealed that samples with higher nitrogen concentration during growth indeed exhibited significantly higher hydrogen production in photocatalytic water splitting. The hydrogen production of high-nitrogen samples was up to 11 times greater than that of other parameter variations.

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