Which innovative product technology revolutionized architectural energy efficiency by being the first commercially viable transparent material that can generate electricity while allowing natural light through?

In the world of architecture, product innovation constantly pushes the boundaries of design possibilities. New materials, technologies, and approaches transform how structures are conceived and built. This trivia question explores a significant recent breakthrough in sustainable architectural products that has changed how designers approach energy efficiency in modern buildings.

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Electrochromic dynamic glass that automatically tints based on sunlight intensity
Transparent solar panels utilizing selective wavelength absorption technology
Self-healing concrete infused with photoluminescent compounds
Aerogel-embedded triple-glazed windows with vacuum insulation