Well, it makes sense in French where DEL means : Diodes Electro Luminescentes, which is LED in english.

From the article:

Quantum dots are already moving in the premium display category, particularly through QD-OLED TVs and monitors. The next step could be QDEL, short for “quantum dot electroluminescent,” also known as NanoLED, screens.

No.

Quantum diode emitting lights

Be careful, you’ll need to keep up on vacuuming around the display, or you’ll have tiny diodes scattered all the place.

Also wear safety googles while viewing. Occasionally the diodes shoot our far, especially if there’s a sudden white flash on screen.