Single-Photon Emitting Arrays by Capillary Assembly of Colloidal Semiconductor CdSe/CdS/SiO2Nanocrystals

• DOI: 10.1021/acsphotonics.3c00351
• Publication Date: 2023-05-01T15:55:56Z
• Authors: Matteo Barelli; Cynthia Vidal; Sergio Fiorito; Alina Myslovska; Dimitrie Cielecki; Vincenzo Aglieri; Iwan Moreels; Riccardo Sapienza; Francesco Di Stasio
• Keywords: Indium tin oxide

The controlled placement of colloidal semiconductor nanocrystals (NCs) onto planar surfaces is crucial for scalable fabrication single-photon emitters on-chip, which are critical elements optical quantum computing, communication, and encryption. positioning NCs such as metal chalcogenides or perovskites still challenging, it requires a nonaggressive process to preserve the properties NCs. In this work, periodic arrays 2500 nanoholes patterned by electron beam lithography in poly(methyl methacrylate) (PMMA) thin film on indium tin oxide/glass substrates. Colloidal core/shell CdSe/CdS NCs, functionalized with SiO2 capping layer increase their size facilitate deposition into 100 nm holes, trapped close optimal Poisson distribution PMMA via capillary assembly method. resulting contain hundreds each. We believe work paves way an affordable, fast, practical method nanodevices, single-photon-emitting light-emitting diodes based