Light-emitting materials in LEDs and lasers quietly underpin digital life — from lighting to smartphone screens to optical communication — and together account for a fast-growing share of global electricity use. Making them more efficient, cheaper to produce, and mechanically flexible is therefore both a climate priority and a consumer one.

We develop solution-processable emitters based on quantum dots such as halide perovskite nanocrystals and tailored (supra-)molecular chromophores, and use ultrafast spectroscopy to watch precisely how each material absorbs, stores, and re-emits light. These insights translate directly into chemical design rules for brighter, more color-pure, and more stable devices. Beyond brightness, we engineer the polarization of the emitted light itself, enabling displays that can bypass lossy polarizing filters, flexible optical communication links, and chiral light sources for holography and emerging quantum technologies.