Reaching the Excitonic Limit in 2D Janus Monolayers by In Situ Deterministic Growth (Adv. Mater. 6/2022)

2D Janus Monolayers In article number 2106222, Mete Atature, Sefaattin Tongay, and co-workers use an in situ deterministic plasma technique to enable the synthesis of high-quality excitonic grade 2D SWSe, SMoSe, and other 2D Janus layers. Integrated spectrometers allow for the collection of structural, optical, and phononic properties during the growth. Through time-resolved studies, the team offers the first insights into the growth process and minute control provides the first with excitonic grade Janus layers.