Quantum dots (QD) are semiconductor nanocrystals that possess unique optical properties. Their emission color can be tuned from the visible throughout the infrared spectrum. This allows quantum dot LEDs to create almost any color on the CIE diagram. This provides more color options and better color rendering than white LEDs since the emission spectrum is much narrower, characteristic of quantum confined states. There are two types of schemes for QD excitation. One uses photo excitation with a primary light source LED (typically blue or UV LEDs are used). The other is direct electrical excitation first demonstrated by Alivisatos et al. COUNT 4
QSN1 What nanocrystals possess unique optical properties? ANS1 Quantum dots QSN2 Quantum Dot LEDs can do what special skill? ANS2 create almost any color on the CIE diagram QSN3 The narrowing of the emission spectrum in Quantum Dot LEDs allows them to do what? ANS3 better color rendering QSN4 How many types of schemes are there in Quantum Dot LED excitation? ANS4 two