Question

Quantum dots are used in display technologies because they
% Question continued Emit light with size-tunable wavelengths

• A. Are very large in size
• B. Emit fixed wavelengths regardless of size
• C. Emit light with size-tunable wavelengths
• D. Absorb only UV light

Hint:

Quantum dots' ability to emit light of specific wavelengths based on their size is a critical feature for applications in displays, solar cells, and LEDs.

Answer 1

The Correct Option is C

Quantum dots are semiconductor particles that are small enough to exhibit quantum mechanical properties. Their size directly influences their electronic properties, particularly the energy levels at which they absorb and emit light.
- The key advantage of quantum dots in display technologies is that their emission wavelength can be tuned by simply adjusting their size. Smaller quantum dots emit light at shorter wavelengths (e.g., blue), while larger dots emit light at longer wavelengths (e.g., red). This tunability makes them highly versatile in various applications, including displays.
Thus, quantum dots are used in display technologies because they emit light with size-tunable wavelengths.