Review of active devices based on colloidal nanocrystals and halide perovskite materials.

What is it about?

This manuscript reviews the great effort undertaken by the scientific community to construct active photonic devices based on colloidal nanocrystals and halide perovskites. The conditions to demonstrate stimulated emission are carefully studied by comparing the dependence of the optical properties of the nanocrystals with their size, shape and composition. In addition, this paper describes the design of different photonic architectures (waveguides and cavities) to enhance the generation of photoluminescence, and hence to reduce the threshold of optical gain. Finally, semiconductor nanocrystals are compared to organometallic halide perovskites, as this novel material has emerged as an alternative to colloidal nanoparticles.

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Why is it important?

Semiconductor nanocrystals and halide perovskites have arisen as outstanding materials to develop a new generation of optoelectronic devices because of their straighforward fabrication process and excellent optical properties. This review summarizes the advances carried with this materials to construct active photonic devices.

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