Bias-Modulated Multicolor Discrimination Enabled by an Organic–Inorganic Hybrid Perovskite Photodetector with a p-i-n-i-p Configuration

Hyeonghun Kim, Woochul Kim, Yusin Pak, Tae Jin Yoo, Hae Won Lee, Byoung Hun Lee, Sooncheol Kwon, Gun Young Jung

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Despite significant progress in color discrimination in various optoelectronic systems, most conventional technologies equipped with dissipative optical filters still suffer from high incident light loss and costly manufacturing. Herein, it is demonstrated that a novel class of organic–inorganic hybrid perovskite photodetectors based on a p-i-n-i-p structure can exhibit a switchable spectral response caused by bias modulation. A single photodetector with a p-i-n-i-p structure in which a low-band n-i-p perovskite diode is vertically stacked on top of a high-band p-i-n perovskite diode allows selective charge extraction from each perovskite diode by switching the bias polarity, resulting in fine discrimination of monochromatic red (R), green (G), and blue (B) light. Furthermore, a combination of two p-i-n-i-p photodetectors is successfully applied for identifying an arbitrary nonmonochromatic color (i.e., a mixed color in RGB space); thus, this approach can pave the way for developing spatially efficient and optical filter-free imaging systems.

Original languageEnglish
Article number2000305
JournalLaser and Photonics Reviews
Volume14
Issue number11
DOIs
StatePublished - Nov 2020

Keywords

  • color discrimination
  • color filter-free
  • p-i-n-i-p configuration
  • perovskites
  • photodetectors

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