Highly Transparent, Yet Photoluminescent

2D CdSe/CdS Nanoplatelet-Zeolitic Imidazolate Framework Composites Sensitive to Gas Adsorption

authored by

Lars F. Klepzig, Nils C. Keppler, Dominik A. Rudolph, Andreas Schaate, Peter Behrens, Jannika Lauth

Abstract

In this work, thin composite films of zeolitic imidazolate frameworks (ZIFs) and colloidal two-dimensional (2D) core-crown CdSe/CdS nanoplatelet (NPL) emitters with minimal scattering are formed by a cycled growth method and yield highly transparent coatings with strong and narrow photoluminescence of the NPLs at 546 nm (FWHM: 25 nm) in a solid-state composite structure. The porous ZIF matrix acts as functional encapsulation for the emitters and enables the adsorption of the guest molecules water and ethanol. The adsorption and desorption of the guest molecules is then characterized by a reversable photoluminescence change of the embedded NPLs. The transmittance of the composite films exceeds the values of uncoated glass at visible wavelengths where the NPL emitters show no absorption (>540 nm) and renders them anti-reflective coatings. At NPL absorption wavelengths (440–540 nm), the transmittance of the thin composite film-coated glass lies close to the transmittance of uncoated glass. The fast formation of innovative, smooth NPL/ZIF composite films without pre-polymerizing the colloidal 2D nanostructures first provides a powerful tool toward application-oriented photoluminescence-based gas sensing.

Organisation(s)

Institute of Physical Chemistry and Electrochemistry
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
Institute of Inorganic Chemistry
Laboratory of Nano and Quantum Engineering

External Organisation(s)

University of Tübingen

Type

Article

Journal

SMALL

Volume

20

No. of pages

8

ISSN

1613-6810

Publication date

02.05.2024

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Biotechnology, Chemistry(all), Biomaterials, Materials Science(all), Engineering (miscellaneous)

Electronic version(s)

https://doi.org/10.1002/smll.202309533 (Access: Open)