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1.School of Physical Science and Technology, Jiangsu Key Laboratory of Frontier Material Physics and Devices, Center for Energy Conversion Materials & Physics (CECMP), Soochow University, Suzhou, China
2.College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou, China
Haoxuan Sun (hxsun@suda.edu.cn)
Wei Tian (wtian@suda.edu.cn)
Liang Li (lli@suda.edu.cn)
Received:14 June 2024,
Revised:10 September 2024,
Accepted:2024-09-11,
Published Online:29 September 2024,
Published:30 November 2024
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Min, L. L. et al. Carrier dynamic identification enables wavelength and intensity sensitivity in perovskite photodetectors. Light: Science & Applications, 13, 2824-2834 (2024).
Min, L. L. et al. Carrier dynamic identification enables wavelength and intensity sensitivity in perovskite photodetectors. Light: Science & Applications, 13, 2824-2834 (2024). DOI: 10.1038/s41377-024-01636-6.
Deciphering the composite information within a light field through a single photodetector
without optical and mechanical structures
is challenging. The difficulty lies in extracting multi-dimensional optical information from a single dimension of photocurrent. Emerging photodetectors based on information reconstruction have potential
yet they only extract information contained in the photoresponse current amplitude (responsivity matrix)
neglecting the hidden information in response edges driven by carrier dynamics. Herein
by adjusting the thickness of the absorption layer and the interface electric field strength in the perovskite photodiode
we extend the transport and relaxation time of carriers excited by photons of different wavelengths
maximizing the spectrum richness of the edge waveform in the light-dark transition process. For the first time
without the need for extra optical and electrical components
the reconstruction of two-dimensional information of light intensity and wavelength has been achieved. With the integration of machine learning algorithms into waveform data analysis
a wide operation spectrum range of 350–750 nm is available with a 100% accuracy rate. The restoration error has been lowered to less than 0.1% for light intensity. This work offers valuable insights for advancing perovskite applications in areas such as wavelength identification and spectrum imaging.
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