研究成功在常溫常壓條件下採用水相合成法合成了具有均勻尺寸分佈的水溶性硒化銀量子點(Ag2Se QDs)。合成過程中使用了硝酸銀(AgNO3)和亞硒酸鈉(Na2SeO3)作為前體材料，並添加巰基乙酸(TGA)作為封端劑分子。我們對不同的合成參數進行了調控，包括元素比例、配體用量、酸鹼度、濃度、合成時間。通過XRD、FTIR、FESEM、EDS、HRTEM、UV-Vis和PL等表徵方法，詳細研究了合成得到的量子點的結構和性質並將其材料應用於近紅外光感測器。
研究結果顯示，合成得到的硒化銀量子點(Ag2Se QDs)尺寸約為10 nm，合成的量子點在紅光到近紅外光波段表現出可調節的發光性質，發光峰值範圍約為730-880 nm，FWHM範圍約為65-155 nm，近紅外光感測器元件的最大響應度約170 (mA/W)，最大光探測率約18.6*1010 Jones，上升時間約為1秒，下降時間約為1秒，。通過對合成參數的優化，我們成功合成了具有優異光學性質的硒化銀量子點(Ag2Se QDs)，為其在光學與電學領域提供了潛在的應用價值。

The successful synthesis of water-soluble silver selenide quantum dots (Ag2Se QDs) with uniform size distribution using an aqueous-phase synthesis method under ambient conditions is investigated. The synthesis process utilized silver nitrate (AgNO3) and sodium selenite (Na2SeO3) as precursor materials, with thioglycolic acid (TGA) added as a capping agent molecule. Various synthesis parameters were controlled, the structure and properties of the synthesized quantum dots were thoroughly studied, and their material application was explored in near-infrared light photodetector.
The research findings reveal that the synthesized silver selenide quantum dots (Ag2Se QDs) have a size of approximately 10 nm. The synthesized quantum dots exhibit tunable luminescent properties in the red to near-infrared wavelength range, with a peak emission ranging from 730 to 880 nm and a FWHM range of 65 to 155 nm. The maximum responsivity of the near-infrared light sensor element is around 170 (mA/W), and the maximum detectivity is approximately 18.6*1010 Jones. The rise time and fall time are both around 1 second. By optimizing the synthesis parameters, we successfully produced silver selenide quantum dots (Ag2Se QDs) with excellent optical properties, offering potential application value in the fields of optics and electronics.

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