quantum dot

What unique optical and electronic properties do quantum dots exhibit?

• They are composed of organic dyes
• They have a fixed bandgap
• They show size-dependent quantum confinement effects
• They emit light at random wavelengths

How does the bandgap of quantum dots differ from bulk semiconductors?

• It is not related to the emitted light wavelength
• It is tunable by adjusting the size of the nanocrystal
• It remains constant regardless of size
• It decreases as the size of the quantum dot decreases

What happens to the emitted light wavelength as the size of a quantum dot decreases?

• It becomes unpredictable
• It shifts towards higher energies
• It shifts towards lower energies
• It remains the same

Why are quantum dots considered highly efficient light emitters?

• They emit light in a broad spectrum
• They have near-unity quantum yields
• Due to their large size
• Because they emit light at random wavelengths

Why is the narrow emission spectra of quantum dots important for LED displays?

• To emit light at specific wavelengths without overlap
• To allow for overlap of colors
• To emit light at random wavelengths
• To reduce their efficiency

What is a key feature of quantum dots that allows them to emit light at precise wavelengths?

• Their unpredictable behavior
• Their narrow emission spectra
• Their large size
• Their size-dependent optical and electronic properties

What is the primary factor that allows quantum dots to emit light at precise wavelengths?

• Their chemical composition
• Their irregular shape
• Their size and composition control
• Their random bandgap

What makes quantum dots attractive for a wide range of applications?

• Their large size
• Their random emission spectra
• Their unpredictable behavior
• Their size-dependent optical and electronic properties

In what areas are quantum dots considered a versatile platform for innovations?

• Biological imaging only
• Display technologies, lighting, and biological imaging
• Lighting and environmental studies
• Medical diagnostics

What are researchers aiming to achieve by exploring the potential of quantum dots?

• To limit their applications
• To prevent further advancements
• To restrict their use in display technologies
• To discover new applications and advancements