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    Nanoscale and Single-Dot Patterning of Colloidal Quantum Dots

    Year: 2015

    Journal: NANO LETTERS, Vol. 15, p 7481-7487, 20170208

    Authors: Xie, Weiqiang; Gomes, Raquel; Aubert, Tangi; Bisschop, Suzanne; Zhu, Yunpeng; Hens, Zeger; Brainis, Edouard; Van Thourhout, Dries

    Organizations: Univ Ghent, INTEC Dept, B-9000 Ghent, Belgium; Univ Ghent, Ctr Nano & Biophoton NB Photon, B-9000 Ghent, Belgium; Univ Ghent, Phys & Chem Nanostruct, B-9000 Ghent, Belgium

    Using an optimized lift-off process we develop a technique for both nanoscale and single-dot patterning of colloidal quantum dot films, demonstrating feature sizes down to similar to 30 nm for uniform films and a yield of 40% for single-dot positioning, which is in good agreement with a newly developed theoretical model. While first of all presenting a unique tool for studying physics of single quantum dots, the process also provides a pathway toward practical quantum dot-based optoelectronic devices.