Organic-on-silicon complementary metal–oxide–semiconductor colour image sensors

Complementary metal–oxide–semiconductor (CMOS) colour image sensors are representative examples of light-detection devices. To achieve extremely high resolutions, the pixel sizes of the CMOS image sensors must be reduced to less than a micron, which in turn significantly limits the number of photons...

Full description

Saved in:
Bibliographic Details
Published in:Scientific reports 2015-01, Vol.5 (1), p.7708-7708, Article 7708
Main Authors: Lim, Seon-Jeong, Leem, Dong-Seok, Park, Kyung-Bae, Kim, Kyu-Sik, Sul, Sangchul, Na, Kyoungwon, Lee, Gae Hwang, Heo, Chul-Joon, Lee, Kwang-Hee, Bulliard, Xavier, Satoh, Ryu-Ichi, Yagi, Tadao, Ro, Takkyun, Im, Dongmo, Jung, Jungkyu, Lee, Myungwon, Lee, Tae-Yon, Han, Moon Gyu, Jin, Yong Wan, Lee, Sangyoon
Format: Article
Language:English
Subjects:
639/301/1005/1009
639/766/1130/2799
CMOS
Color
Digital cameras
Filters
Humanities and Social Sciences
multidisciplinary
Photons
Science
Sensors
Silicon
Wavelengths
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Complementary metal–oxide–semiconductor (CMOS) colour image sensors are representative examples of light-detection devices. To achieve extremely high resolutions, the pixel sizes of the CMOS image sensors must be reduced to less than a micron, which in turn significantly limits the number of photons that can be captured by each pixel using silicon (Si)-based technology ( i.e. , this reduction in pixel size results in a loss of sensitivity). Here, we demonstrate a novel and efficient method of increasing the sensitivity and resolution of the CMOS image sensors by superposing an organic photodiode (OPD) onto a CMOS circuit with Si photodiodes, which consequently doubles the light-input surface area of each pixel. To realise this concept, we developed organic semiconductor materials with absorption properties selective to green light and successfully fabricated highly efficient green-light-sensitive OPDs without colour filters. We found that such a top light-receiving OPD, which is selective to specific green wavelengths, demonstrates great potential when combined with a newly designed Si-based CMOS circuit containing only blue and red colour filters. To demonstrate the effectiveness of this state-of-the-art hybrid colour image sensor, we acquired a real full-colour image using a camera that contained the organic-on-Si hybrid CMOS colour image sensor.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep07708