Nature, Published online: 24 June 2026; doi:10. 1038/s41586-026-10662-w Optical cooling in two-dimensional semiconductor heterostructures is demonstrated through phonon-assisted interfacial charge transfer, enabling cryogen-free thermal management without stringent quantum-efficiency requirements.

Source: [Nature](https://www.nature.com/articles/s41586-026-10662-w)

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