Light amplification by stimulated emission from electrically driven colloidal quantum dots finally achieved

https://phys.org/news/2023-05-amplification-emission-electrically-driven-colloidal.html

"solution-cast semiconductor nanocrystals... electrically pumped lasing devices prepared on any crystalline or non-crystalline substrate without sophisticated vacuum-based growth techniques or clean-room... long optical gain lifetimes, large gain coefficients and low lasing thresholds... integrating photonic and electronic circuits...current densities of up to approximately 2,000 amperes per square centimeter... lighting, displays, quantum information, medical diagnostics and chemical sensing"

Related:

Symmetric graphene quantum dots for future qubits

https://phys.org/news/2023-05-symmetric-graphene-quantum-dots-future.html

photoconversion and storage efficiency (PCSE) of 1.988%
https://phys.org/news/2023-05-crystal-based-photonic-metamaterial.html