Monolithic Tandem Multicolor Image Sensor Based on Electrochromic Color-Radix Demultiplexing

Young Jin Choi, Sae Byeok Jo, Jeong Ho Cho

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Optical data acquisition has been set as one of the milestones to testify the developments aimed at harnessing the full potential of the spatial and temporal data processing capabilities of the advanced semiconductor technology. A highly promising approach to drive the level of acquisition beyond the current technological node is the vertical integration of multiple photodetectors. However, vertical integration so far requires the same level of circuit complexity as lateral integration from the incapability of monolithic integration. Here, an electrochromic device architecture is introduced that enables realization of a monolithic tandem multicolor photodetector. The device, composed of vertically stacked p-type and n-type graphene barristors, is demonstrated to be capable of regulating the balanced charge transport under any desired illumination wavelengths. It exhibits variable anti-ambipolar charge transport behavior, which yields sensitive voltage-controlled photoconductive gain spectra. These electrical behaviors are utilized to fabricate an optoelectronic logic sensor that can demultiplex the desired color coordinate or wavelength in the constituent array with high color accuracy.

Original languageEnglish
Article number2102725
JournalAdvanced Materials
Issue number35
Publication statusPublished - 2021 Sept 2

Bibliographical note

Funding Information:
This work was supported by the Basic Science Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Science and ICT (MSIT), Korea (2020R1A2C2007819), the Basic Science Program through NRF of Korea funded by the Ministry of Education, Korea (2020R1A6A3A01098863), the Creative Materials Discovery Program through the NRF funded by the MSIT, Korea (NRF‐2019M3D1A1078299), and the Materials & Components Technology Development Program (20006537, Development of High Performance Insulation Materials for Flexible OLED Display TFT) funded by the Ministry of Trade, Industry and Energy (MOTIE), Korea.

Publisher Copyright:
© 2021 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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