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| Project Title | Enhancing Photoluminescence Quantum Yield for High Performance Optoelectrics | |
|---|---|---|
| Track Code | 25573 | |
| Website | https://techtransfer.universityofcalifornia.edu/NCD/25573.html?utm_source=AUTMGTP&utm_medium=webpage&utm_term=ncdid_25573&utm_campaign=TechWebsites | |
| Short Description | None | |
| Abstract | Surface defects dominate the behavior of minority carriers in semiconductors and optoelectronic devices. Photoluminescence quantum yield (QY), which dictates efficiency of optoelectrics such as LEDs, lasers, and solar cells, is extremely low in materials with a large number of surface defects. Researchers at UC Berkeley and Lawrence Berkeley National Laboratory have developed a bis(trifluoromethane) sulfonamide (TFSI) solution for passivation/repair of surface defects in 2D transition metal dichalcogenide (TMDC). This air-stable solution-based chemical treatment provides unmatched photoluminescence QY enhancement to values near 100% without changing the surface morphology. The treatment eliminates defect-mediated non-radiative recombination, which eliminates the low performance limit of TMDC and enhances its minority carrier lifetime. This novel development can address surface passivation in numerous semiconductors which will lead to highly efficient light emitting diodes, lasers and solar cells based on 2D materials. | |
| Tags | 2D, optoelectronic, semiconductor, passivation, photoluminescence quantum yield, surface defect, QY, metal dichalcogenide, TMDC, SOLAR, chemicals, Processing and Production | |
| Posted Date | Aug 17, 2017 11:28 AM | |
Advantages |
- Quantum yield enhancement to near-unit values
- Surface recombination velocity reduction
- Improved Voc in solar cells
- PL peak intensity increase
Potential Applications |
Additional Information |
Additional Technologies by these Inventors
Tech ID/UC Case
25573/2016-079-0
Related Cases
2016-079-0
Contact Information |
Name : Laleh Shayesteh
Title :
Department :
Email : lalehs@berkeley.edu
Phone : 510-642-4537
Address :
Principal Investigator |
Name : Matin Amani
Department :
Name : James Bullock
Department :
Name : Ali Javey
Department :
Name : Daisuke Kiriya
Department :
Name : Der-Hsien Lien
Department :
Intellectual Property |
Patent Number : 9852927
Patent Title :
Patent Application Date :
Patent Publication Date :
Patent Issue Date : Dec 26, 2017
Patent Link : http://www.google.com/patents/US9852927