Engineers develop dual-purpose laser and LED device based on colloidal quantum dot technology

https://phys.org/news/2023-03-dual-purpose-laser-device-based-colloidal.html

"high current densities >500 ampere/ square cm... brightness >million candela/ square meter... efficient net optical gain waveguide amplifier... narrow-band lasing with fully functional LED-type device stack containing all charge transport layers and other elements required for electrical pumping...  circulating light in lateral plane of quantum dot layer enabling multi-pass amplification... integrated electronics and photonics, optical interconnects, lab-on-a-chip platforms, wearable devices and medical diagnostics"

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