Fluorescent quantum dots are widely used in biological imaging due to their bright and stable fluorescence. They enable high-resolution tracking of cells and molecules in real-time, making them valuable in medical research and diagnostics. In electronics, they are applied in displays and LEDs to produce vibrant, energy-efficient colors. Additionally, they are utilized in solar cells to enhance light absorption and improve energy conversion efficiency. Their tunable optical properties also make them useful in sensors for detecting environmental pollutants or biological markers.