Premium
Vertically Stacked Perovskite Detectors for Color Sensing and Color Vision
Author(s) -
Qarony Wayesh,
Kozawa Masayuki,
Khan Haris Ahmad,
Hossain Mohammad Ismail,
Salleo Alberto,
Tsang Yuen Hong,
Hardeberg Jon Yngve,
Fujiwara Hiroyuki,
Knipp Dietmar
Publication year - 2020
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202000459
Subject(s) - color filter array , materials science , color gel , sensitivity (control systems) , optoelectronics , optical filter , optics , spectral sensitivity , filter (signal processing) , light emitting diode , detector , computer science , computer vision , wavelength , layer (electronics) , electronic engineering , physics , nanotechnology , engineering , thin film transistor
Optical color sensors based on perovskites are described. These sensors overcome the limits of conventional image sensors used in smartphones and digital cameras. The sensors allow for detecting the primary colors red, green, and blue without using optical filters. The color sensors consist of vertically stacked diodes using perovskite alloys. The described sensor structure is color aliasing or color moiré error free, while conventional sensors using optical filters are limited by this error. The spectral sensitivity of vertically stacked sensors is up to three times higher than the spectral sensitivity of filter‐based color sensors. The optical constants of the required perovskite alloys are determined, and color sensors are electromagnetically modeled. The spectral sensitivities of the sensors are colorimetrically characterized and compared to sensors in the literature including conventional sensors using optical filters. This study, for the first time, shows that a vertically stacked three color sensor exhibits a color error equal to, or smaller than, errors of conventional sensors using optical filters. Details on the used materials, the device design, and the colorimetric analysis are provided.