SIOM and Partners Make Progress in Low-Threshold Violet-Blue Perovskite Lasers
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SIOM, together with the Hangzhou Institute for Advanced Study of the University of Chinese Academy of Sciences and ShanghaiTech University, proposed a molecular-isomerism-driven halide-exchange route and achieved violet-blue perovskite lasing at 423 nm. The team used SOCl₂ as the chlorine source to prepare the gain medium. The thin film showed amplified spontaneous emission (ASE) threshold of 1.4 μJ·cm⁻² and a random lasing threshold of 2.6 μJ·cm⁻². Unencapsulated and pumped at 25 times the threshold, the ASE output reached a T95 lifetime of 7×10⁷ pulses and 19.5 hours of continuous operation. The results were published in ACS Nano.
The study uses molecular conformational isomerism to control halide-ion exchange, lowering the threshold of violet-blue perovskite lasers while improving stability, and offering a preparation route for short-wavelength gain media.
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Source: Shanghai Institute of Optics and Fine Mechanics (SIOM) · Research Updates · siom.cas.cn