Luminescent films employing quantum dot-cellulose nanocrystal hybrid nanomaterials

Xinmei Liu, Farsad Imtiaz Chowdhury, Lingju Meng, Qiwei Xu, Xihua Wang

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Colloidal quantum dot (QD) materials are promising candidates for luminescent solar concentrator (LSC) technology thanks to their broadband absorption above semiconductor bandgap and tunable Stokes-shift for minimizing the light reabsorption. Previously reported QDs in LSC contain non-polar organic ligands that can be easily incorporated into common host matrix/waveguide materials – polyacrylates or polycarbonates, however, these organic ligands on QD surfaces introduce problems when some new matrix materials are employed. For example, cellulose nanocrystal (CNC), a wood-derived eco-friendly material, has the potential for LSC, but no solvents are available to dissolve both QD and CNC simultaneously. Here we report high-quality luminescent films employing QD-CNC hybrid materials. Such films are produced from stable QD-CNC suspension by applying solution-phase exchange to replace non-polar organic ligands on QDs to the metal halide complex, as well as performing acetylation on CNC surfaces. The fabricated QD-CNC hybrid film keeps similar photoluminescence quantum yield and lifetime compared to as-synthesized QDs in non-polar organic solvents. The developed method in this work has the potential to be widely used to mix QD with other materials having polar functional groups.

Original languageEnglish
Article number129737
Number of pages4
JournalMaterials Letters
Volume294
DOIs
Publication statusPublished - 1 Jul 2021
MoE publication typeA1 Journal article-refereed

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