Assembly-promoted repeatable enhancement of photoluminescence from cesium lead tribromide nanocubes under light illumination

Shota Hashimoto; Hiroto Watanabe; Yoshiki Iso; Yuya Oaki; Tetsuhiko Isobe; Hiroaki Imai

doi:10.1039/d4na00665h

Assembly-promoted repeatable enhancement of photoluminescence from cesium lead tribromide nanocubes under light illumination

Nanoscale Adv. 2024 Oct 15;6(22):5563-5567. doi: 10.1039/d4na00665h. Online ahead of print.

Authors

Shota Hashimoto¹, Hiroto Watanabe¹, Yoshiki Iso¹, Yuya Oaki¹, Tetsuhiko Isobe¹, Hiroaki Imai¹

Affiliation

¹ Department of Applied Chemistry, Faculty of Science and Technology, Keio University 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan hiroaki@applc.keio.ac.jp.

Abstract

A repeatable enhancement of the photoluminescence (PL) from CsPbBr₃ nanocubes (NCs) is promoted by the assembling of NCs. The PL quantum yield (QY) of ordered NC arrays increases with photoirradiation and decreases in the dark. The repeatable enhancement of the PLQY cannot be observed from isolated NCs. The nanospaces between NCs in the ordered arrays allow a reversible change in thermally stimulated desorption and photo-induced adsorption of surface ligands that affect the PLQY.