Related Experiment Video
Updated: Dec 6, 2025
Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors
Published on: June 23, 2018
Sensitively switchable visible/infrared multispectral detection and imaging based on a tandem perovskite device
Jiaxin Liu1, Yousheng Zou1, Bo Huang1
1Key Laboratory of Advanced Display Materials and Devices, Ministry of Industry and Information Technology, Institute of Optoelectronics & Nanomaterials, School of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China. xiaobaoxu@njust.edu.cn zeng.haibo@njust.edu.cn.
Researchers developed a novel perovskite photodetector for multispectral imaging. This device enables selective detection of visible and near-infrared light, advancing target identification capabilities.
Area of Science:
- Materials Science
- Photonics
- Optoelectronics
Background:
- Multispectral detection enhances target identification by enabling sensing beyond human visual range.
- Vertebrate vision utilizes switchable sensing of visible and near-infrared photons.
Purpose of the Study:
- To construct a single-sensor device for multispectral detection of visible and near-infrared (NIR) photons.
- To achieve tunable sensing responses through applied bias modulation of built-in potential.
Main Methods:
- Stacking solution-processed MAPbI3 and MA0.5FA0.5Pb0.5Sn0.5I3 perovskite layers in opposite polarity.
- Utilizing applied bias to modulate built-in potential for tunable sensing.
- Characterizing device performance including on/off ratio, optical crosstalk, detectivity, and switching rate.
Main Results:
- Selective sensing of visible (350-800 nm) and NIR (700-1000 nm) photons achieved in a single photodetector.
- High on/off ratio of ~10^4, low optical crosstalk of -70 dB, and specific detectivity > 10^12 Jones.
- High mode-switching rate of 1000 Hz and -3 dB bandwidth of ~50 kHz demonstrated.
Conclusions:
- The developed solution-processed perovskite-based multispectral photodetector offers advanced capabilities for fast and sensitive target imaging and identification.
- The device's tunable sensing and high performance metrics make it suitable for next-generation optoelectronic applications.
- This work highlights the potential of perovskite materials in creating sophisticated multispectral sensing systems.
