Spectrum projection with a bandgap-gradient perovskite cell for colour perception

Mei-Na Zhang; Xiaohan Wu; Antoine Riaud; Xiao-Lin Wang; Fengxian Xie; Wen-Jun Liu; Yongfeng Mei; David Wei Zhang; Shi-Jin Ding

doi:10.1038/s41377-020-00400-w

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Spectrum projection with a bandgap-gradient perovskite cell for colour perception

Original Articles

- Spectrum projection with a bandgap-gradient perovskite cell for colour perception
- Spectrum projection with a bandgap-gradient perovskite cell for colour perception
- LSA 2020年9卷第5期页码：1549-1561
- Affiliations：
  
  1.State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai 200433, China
  2.Engineering Research Centre of Advanced Lighting Technology, Ministry of Education, Fudan University, Shanghai 200433, China
  3.Department of Materials Science, Fudan University, Shanghai 200433, China
- Author bio：
  
  Xiaohan Wu (wuxiaohan@fudan.edu.cn)
  Shi-Jin Ding (sjding@fudan.edu.cn)
- Funds：
- DOI：10.1038/s41377-020-00400-w
  中图分类号：
- 纸质出版日期：2020，
  
  网络出版日期：2020-09-15，
  
  收稿日期：2020-06-08，
  
  修回日期：2020-08-22，
  
  录用日期：2020-08-31
- Accepted：
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Spectrum projection with a bandgap-gradient perovskite cell for colour perception[J]. LSA, 2020,9(5):1549-1561.

Zhang, M. N. et al. Spectrum projection with a bandgap-gradient perovskite cell for colour perception. Light: Science & Applications, 9, 1549-1561 (2020).
Spectrum projection with a bandgap-gradient perovskite cell for colour perception[J]. LSA, 2020,9(5):1549-1561. DOI： 10.1038/s41377-020-00400-w.

Zhang, M. N. et al. Spectrum projection with a bandgap-gradient perovskite cell for colour perception. Light: Science & Applications, 9, 1549-1561 (2020). DOI： 10.1038/s41377-020-00400-w.

摘要

Abstract

Optoelectronic devices for light or spectral signal detection are desired for use in a wide range of applications

including sensing

imaging

optical communications

and in situ characterization. However

existing photodetectors indicate only light intensities

whereas multiphotosensor spectrometers require at least a chip-level assembly and can generate redundant signals for applications that do not need detailed spectral information. Inspired by human visual and psychological light perceptions

the compression of spectral information into representative intensities and colours may simplify spectrum processing at the device level. Here

we propose a concept of spectrum projection using a bandgap-gradient semiconductor cell for intensity and colour perception. Bandgap-gradient perovskites

prepared by a halide-exchanging method via dipping in a solution

are developed as the photoactive layer of the cell. The fabricated cell produces two output signals: one shows linear responses to both photon energy and flux

while the other depends on only photon flux. Thus

by combining the two signals

the single device can project the monochromatic and broadband spectra into the total photon fluxes and average photon energies (i.e.

intensities and hues)

which are in good agreement with those obtained from a commercial photodetector and spectrometer. Under changing illumination in real time

the prepared device can instantaneously provide intensity and hue results. In addition

the flexibility and chemical/bio-sensing of the device via colour comparison are demonstrated. Therefore

this work shows a human visual-like method of spectrum projection and colour perception based on a single device

providing a paradigm for high-efficiency spectrum-processing applications.

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