Which of the following best explains why Quantum Dots (QDs) are increasingly used in advanced technology applications?
(a) Their ability to absorb and emit light at specific wavelengths improves efficiency in solar cells and display technologies.
(b) Their electrical properties remain constant regardless of their size, making them suitable for uniform semiconductor production.
(c) They function as superconductors at room temperature, making them ideal for energy storage solutions.
(d) They remain chemically inactive in biological environments, ensuring complete safety in medical applications.

Question

Which of the following best explains why Quantum Dots (QDs) are increasingly used in advanced technology applications?
(a) Their ability to absorb and emit light at specific wavelengths improves efficiency in solar cells and display technologies.
(b) Their electrical properties remain constant regardless of their size, making them suitable for uniform semiconductor production.
(c) They function as superconductors at room temperature, making them ideal for energy storage solutions.
(d) They remain chemically inactive in biological environments, ensuring complete safety in medical applications.

ONLiNE UPSC · Accepted Answer

Quantum Dots (QDs) are semiconductor nanocrystals that have size-dependent optical and electronic properties. Their ability to tune light absorption and emission by adjusting their size makes them highly valuable for applications in:
● Display technologies (e.g., QLED TVs) for better color accuracy and efficiency.
● Solar cells for enhanced light absorption and energy conversion.
● Biomedical imaging due to their bright and tunable fluorescence properties.

Other incorrect options:
● Option (b) is not correct: The electrical properties of Quantum Dots vary with size, affecting their bandgap and making them tunable rather than uniform.
● Option (c) is not correct: Quantum Dots do not exhibit superconductivity at room temperature.
● Option (d) is not correct: Quantum Dots can be chemically reactive, and their toxicity depends on their composition, limiting their complete safety in medical applications.

Quantum Dots (QDs)

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M Question 1	⏱ 0
Which of the following best explains why Quantum Dots (QDs) are increasingly used in advanced technology applications? (a) Their ability to absorb and emit light at specific wavelengths improves efficiency in solar cells and display technologies. (b) Their electrical properties remain constant regardless of their size, making them suitable for uniform semiconductor production. (c) They function as superconductors at room temperature, making them ideal for energy storage solutions. (d) They remain chemically inactive in biological environments, ensuring complete safety in medical applications.