Ultra-small Ge1-xSnx quantum dots with visible photoluminescence

Richard J Alan Esteves; Shopan Hafiz; Denis O Demchenko; Ümit Özgür; Indika U Arachchige

doi:10.1039/c6cc04242b

Ultra-small Ge_1-xSn_x quantum dots with visible photoluminescence

Chem Commun (Camb). 2016 Sep 22;52(78):11665-11668. doi: 10.1039/c6cc04242b.

Authors

Richard J Alan Esteves¹, Shopan Hafiz², Denis O Demchenko³, Ümit Özgür², Indika U Arachchige¹

Affiliations

¹ Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, USA. iuarachchige@vcu.edu.
² Department of Electrical and Computer Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, USA.
³ Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, USA.

PMID: 27709150
DOI: 10.1039/c6cc04242b

Abstract

Ge_1-xSn_x alloy quantum dots (QDs) were synthesized with sizes ranging from 1-3 nm exhibiting visible orange-red photoluminescence. Composition dependent optical properties were characterized and supported by theoretical calculations. Structural analysis suggests the QDs are diamond cubic phase, characteristic of Ge_1-xSn_x thin films and nanocrystals (NCs) reported to date.