Monday, November 11, 2019

Ink for Image Sensor Printing

University of Toronto publishes an ACS paper "Stable Colloidal Quantum Dot Inks Enable Inkjet-Printed High-Sensitivity Infrared Photodetectors" by Rafal Sliz, Marc Lejay, James Z. Fan, Min-Jae Choi, Sachin Kinge, Sjoerd Hoogland, Tapio Fabritius, F. Pelayo GarcĂ­a de Arquer, and Edward H. Sargent.

"Colloidal quantum dots (CQDs) have recently gained attention as materials for manufacturing optoelectronic devices in view of their tunable light absorption and emission properties and compatibility with low-temperature thin-film manufacture. The realization of CQD inkjet-printed infrared photodetectors has thus far been hindered by incompatibility between the chemical processes that produce state-of-the-art CQD solution-exchanged inks and the requirements of ink formulations for inkjet materials processing.

We fabricate inkjet-printed photodetectors exhibiting the highest specific detectivities reported to date (above 1012 Jones across the IR) in an inkjet-printed quantum dot film. As a patternable CMOS-compatible process, the work offers routes to integrated sensing devices and systems.


  1. Previous Invisage CTO, right? Previous material must be something like PbSe, this guy is good at solar-cell.

  2. Wasn't that quantum dot technology by InVisage a monumental failure? Also I thought Apple bought it, regretted it, and shut down the entire company.

  3. Interesting how much envy there is in this imaging community. It's a bit sad.
    Looking at such a story from outside, I would argue that if you sell your company to Apple, you must have done at least something right...


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