Table 1 Comparative summary of Foveon, CFA (Bayer) and stacked-perovskite sensors

From: Vertically stacked monolithic perovskite colour photodetectors

 

Silicon CFA

Foveon (stacked silicon)

Stacked perovskite

Colour reproduction

Fair

Bad

Good

Light utilization

Bad

Faira

Good

Spatial resolution

Reduced

Original

Original

Demosaicing related artefacts

Strong

Minor

Minor

Detectivity

Good

Good

Under developmentb

Technological complexity

Relatively easy

Relatively complicated

Under developmentb

  1. The stacked-perovskite photodetectors outperform the conventional CFA image sensors in all important characteristics, except for the technological complexity of fabrication, which may be challenging to estimate yet. Although the Foveon and stacked-perovskite arrays have a rather similar set of characteristics owing to matching geometrical structure, the stacked-perovskite detectors have much better colour reproduction and more distinct light utilization. These advantages confirm the potential of monolithically stacked-perovskite detectors to overcome the fundamental limitations of the existing CMOS silicon sensors and ultimately to achieve a breakthrough in image quality and sensor performance.
  2. aGood absorption, but photons are often absorbed in a wrong colour pixel.
  3. bDifficult to compare at a research prototype stage.
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