Perovskite Color Detectors : Approaching the Efficiency Limit

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

23 Scopus Citations
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  • Mohammad Ismail Hossain
  • Haris Ahmad Khan
  • Masayuki Kozawa
  • Wayesh Qarony
  • Alberto Salleo
  • And 4 others
  • Jon Yngve Hardeberg
  • Hiroyuki Fujiwara
  • Yuen Hong Tsang
  • Dietmar Knipp


Original languageEnglish
Pages (from-to)47831-47839
Journal / PublicationACS Applied Materials & Interfaces
Issue number42
Online published23 Sep 2020
Publication statusPublished - 21 Oct 2020


Color image sensing by a smartphone or digital camera employs sensor elements with an array of color filters for capturing basic blue, green, and red color information. However, the normalized optical efficiency of such color filter-based sensor elements is limited to only one-third. Optical detectors based on perovskites are described, which can overcome this limitation. An efficient color sensor design has been proposed in this study that uses a vertically stacked arrangement of perovskite diodes. As compared to the conventional color filter-based sensors, the proposed sensor structure can potentially reach normalized optical efficiency approaching 100%. In addition, the proposed sensor design does not exhibit color aliasing or color Moiré effects, which is one of the main limitations for the filter-based sensors. Furthermore, up to our knowledge, for the first time, it could be theoretically shown that both vertically arranged sensor and conventional color filter-based sensor provide almost comparable color errors. The optical properties of the perovskite materials are determined by optical measurements in combination with an energy shift model. The optics of the stacked perovskite sensors is investigated by threedimensional finite-difference timedomain simulations. Finally, colorimetric characterization was carried out to determine the color error of the sensors.

Research Area(s)

  • color science, color sensor, optical detector, perovskite, quantum efficiency

Citation Format(s)

Perovskite Color Detectors : Approaching the Efficiency Limit. / Hossain, Mohammad Ismail; Khan, Haris Ahmad; Kozawa, Masayuki et al.

In: ACS Applied Materials & Interfaces, Vol. 12, No. 42, 21.10.2020, p. 47831-47839.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review