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PRI research achievement: multiple exciton generation in tin-lead halide perovskite nanocrystals for photocurrent quantum efficiency enhancement

23 Sep 2022

An interdisciplinary team led by Dr Li MingJie of the Photonic Research Institute (PRI), recently developed high-quality halide perovskite nanocrystals with enhanced multiple exciton generation (MEG). Nanocrystals (also known as quantum dots) developed from rational design can convert a high-energy photon into multiple electron-hole pairs, breaking the power conversion efficiency limit. The team successfully demonstrated for the first time that the internal quantum efficiency exceeded 100% at a low threshold, with the use of perovskite nanocrystals. The findings have been published in the highly influential journal Nature Photonics. Dr Li’s research has deepened our understanding of the MEG mechanism and provided valuable solutions for developing highly efficient light-harvesting techniques, including photovoltaics, photon detection, and solar-fuel production.

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Research Units Photonics Research Institute

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