![\"Perovskites](\"https:\/\/www.europesays.com\/us\/wp-content\/uploads\/2025\/10\/perovskites-reveal-ult-1.jpg\" "\\"Evaporated")
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Evaporated FAPbI3 films exhibit good quality. Credit: arXiv: DOI: 10.48550\/arxiv.2502.13609<\/p>\n
Halide perovskites\u2014already a focus of major research into efficient, low-cost solar cells\u2014have been shown to handle light faster than most semiconductors on the market.<\/p>\n
A new paper, published in Nature Nanotechnology, reports quantum transients on the scale of ~2 picoseconds at low temperature in bulk formamidinium lead iodide films grown by scalable solution or vapor methods. That ultrafast timescale indicates use in very fast light sources and other photonic components. Crucially, these effects appear in films made by scalable processing rather than specialized growth in lab settings\u2014suggesting a practical and affordable route to explore ultrafast quantum technology.<\/p>\n
“Perovskites continue to surprise us,” said Professor Sam Stranks, who led the study. “This discovery shows how their intriguing nanoscale structure gives rise to intrinsic quantum properties that could be harnessed for future photonic technologies.”<\/p>\n
Joint first authors in Prof Stranks’ Optoelectronic Materials and Device Spectroscopy Group, post-doctoral researcher Dr. Dengyang Guo and Ph.D. student Tom Selby, combined ultrafast spectroscopy<\/a> with optical and electron microscopy<\/a> to pinpoint the origin of the effect. The team attribute the rapid emission to quantum tunneling in ordered nanodomain superlattices\u2014alternating structural domains within the material that create the conditions for very fast radiative recombination.<\/p>\n Dr. Guo said, “Seeing these ultrafast effects in scalable films is exciting. It shows perovskites have even more to offer than we realized, beyond solar cell optimization.”<\/p>\n Selby added, “Being able to trace the emission back to the structure has been an eye-opener\u2014it is really exciting to consider the potential of what this research could lead to.”<\/p>\n The study emphasizes both opportunity and caution. The ultrafast transients point to potential applications\u2014ultrafast emitters or increased accuracy in measurements, for example. But the measurements were carried out at low temperature<\/a>, and the paper does not report room-temperature performance or quantum-optics metrics such as single-photon purity or indistinguishability. It does, however, further demonstrate the multi-use potential of halide perovskites.<\/p>\n More information:<\/strong> \n\t\t\t\t\t\t\t\t\t\t\t\t\tProvided by \t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n \n\t\t\t\t\t\t\t\t\t\t\t\tCitation<\/strong>: \n\t\t\t\t\t\t\t\t\t\t\t This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
\n\t\t\t\t\t\t\t\t\t\t\t\tPicosecond quantum transients in halide perovskite nanodomain superlattices, Nature Nanotechnology (2025). DOI: 10.1038\/s41565-025-02036-6<\/a>. On arXiv: DOI: 10.48550\/arxiv.2502.13609<\/a><\/p>\n
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tUniversity of Cambridge<\/a>
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\n\t\t\t\t\t\t\t\t\t\t\t\tPerovskites reveal ultrafast quantum light in new study (2025, October 29)
\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 29 October 2025
\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news\/2025-10-perovskites-reveal-ultrafast-quantum.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n
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