Dr. Seok Kim and Dr. Moonsub Shim from the University of Illinois have developed dry means to pattern QD films over large areas with high resolution while maintaining desired properties. This method avoids standard solution based processing and microfabrication methods which are chemically incompatible with quantum dots. Their method of transfer printing is a scalable and cost-effective approach to manufacturing the next generation of QD lighting, display, and photovoltaic technology.
Photoluminescence (PL) images of patterned QD films on ODTS coated Si substrates. (a) Red, green, and blue (RGB) QD films patterned in circle, triangle, and star shapes. (b) RGB QD square arrays. (c) Red QD film patterned into ‘UIUC’. All scale bars are 50 microns. (d) PL spectra of patterned RGB QD films.