本論文將以Pentacene及Tetracene作為主動層材料，並分為兩部分來作探討，第一部分為製作成有機薄膜電晶體，元件的第一層主動層為Pentacene(70 nm)，第二層為Tetracene(50 nm)，經由實驗結果得知此雙層主動層結構相較於單層主動層結構之元件有著更佳的電特性，並藉由負閘極偏壓測試及水氧可靠度測試得知此雙層結構元件有更佳的穩定度，另外可由AFM材料分析得知不同元件的材料晶相差異，此較佳的電特性將利用能帶圖加以解釋。
第二部分為製作成有機光感測薄膜電晶體，結構與第一部分相同，在此部分Pentacene是作為通道層，Tetracene是作為吸光層，元件製作完後分別照紅、綠、藍三種相同功率不同波長的光，量測照光後變化的電特性，並計算出分別之光響應度，經由實驗結果得知雙層結構相較於單層結構之響應度有顯著的提升，然後固定通道層厚度(70 nm)，調變吸光層厚度(0、10、30、50、70 nm)至元件電特性及響應度達最佳值，並利用UV-Visible 光譜儀量測薄膜之光吸收度，驗證此雙層結構在可見光波段的吸收度確實明顯的提升，最後再以AFM量測不同吸光層厚度其晶相的差異，加以說明此雙層結構不僅提升電特性，也能顯著提升響應度。

In this study, Pentacene and Tetracene will be used as active layer materials and will be divided into two devices. The first device is to make organic thin film transistor (OTFT). The first active layer of the OTFT is Pentacene, and the second layer is Tetracene, the experimental results show that the two-layer active layer structure has better electrical characteristics than the single-layer active layer structure, and is known by negative gate bias test and water oxygen reliability test. The two-layer structural device has better stability, and the difference in crystalline structure of the material of the different device can be obtained by AFM analysis. The better electrical characteristics will be explained by the energy band diagram.
The second part is to make an organic phototransistor (OPT). The structure is the same as that of the first part. In this part, Pentacene is used as the channel layer, and Tetracene is used as the light absorbing layer. After the devices are fabricated, the red, green, and blue lights of the same power and different wavelengths are respectively measured. Through the experimental results, it is found that the responsivity of the two-layer structure is significantly improved compared with the single-layer structure, and then the thickness of the channel layer is fixed ( 70 nm), modulating the thickness of the light absorbing layer (0, 10, 30, 50, 70 nm) to the best electrical characteristics and responsivity of the device, and measuring the light absorbance of the film by UV-Visible spectrometer, verifying the absorption of the double structure in the visible light band is obviously improved. Finally, the difference in the crystalline structure of the thickness of the different light absorbing layers is measured by AFM. It is shown that the double layer structure not only improves the electrical characteristics, but also significantly improves the responsivity.

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