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Nanocrystal Circuits for Flexible Electronics

Description:

New fabrication techniques for CdSe QD FETs

 

Inventor

Cherie Kagan  

 

Problem

Many researchers are attempting to create flexible electronics, which could have applications for new mobile and wearable devices. However, traditional semiconductor materials are not flexible, so new materials and fabrication techniques are needed to make flexible electronics possible. 

 

Solution

Researchers at the University of Pennsylvania have created flexible electronic materials based on CdSe quantum dot (QD) thin-film field effect transistors (FETs). A new processing technique enables low-cost, wide-area fabrication of QD thin films in a process compatible with plastic substrates. An additional doping step makes these devices stable when exposed to air. This makes air-exposed fabrication techniques such as photolithography and atomic layer deposition possible.  The fabrication technique developed at Penn has been used to create QD FET based transistors, invertors, amplifiers, NOR & NAND gates, and ring oscillators. Electron mobility for these materials has been demonstrated from 13-22 cm^2/Vs, orders of magnitude higher than previous QD FET efforts, producing results comparable or superior to silicon FETs.

 

Advantages 

•       Air-stable fabrication

•       Wide-area fabrication (up to 4 inch demonstrated in laboratory)

•       Compatible with flexible plastic substrates

•       Comparable performance to silicon electronics

 

 

Stage of Development

•       Prototype

Intellectual Property

1.       US Patent 9,336,919. Additional US patent applications pending.

 

Reference Media

Stinner et al. (2015). Flexible, High-Speed CdSe Nanocrystal Integrated Circuits. Nano Letters 15 (10). http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.5b03363

 

Desired partnerships

• License

Co-development

 

 

Download PDF

 

Docket #  Y6232 


Patent Information:
For Information, Contact:
Qishui Chen
University of Pennsylvania
215-898-9591
qchen1@upenn.edu
Inventors:
Cherie Kagan
Keywords: