Highly Transparent, Yet Photoluminescent: 2D CdSe/CdS Nanoplatelet‐Zeolitic Imidazolate Framework Composites Sensitive to Gas Adsorption

Author:

Klepzig Lars F.12ORCID,Keppler Nils C.23ORCID,Rudolph Dominik A.1ORCID,Schaate Andreas234ORCID,Behrens Peter234ORCID,Lauth Jannika1245ORCID

Affiliation:

1. Institute of Physical Chemistry Leibniz University Hannover Callinstraße 3A D‐30167 Hannover Germany

2. Cluster of Excellence PhoenixD (Photonics Optics and Engineering – Innovation Across Disciplines) Leibniz University Hannover Welfengarten 1A D‐30167 Hannover Germany

3. Institute of Inorganic Chemistry Leibniz University Hannover Callinstraße 9 D‐30167 Hannover Germany

4. Laboratory of Nano and Quantum Engineering (LNQE) Leibniz University Hannover Schneiderberg 39 D‐30167 Hannover Germany

5. Institute of Physical Chemistry and Theoretical Chemistry University of Tübingen Auf der Morgenstelle 18 D‐30167 Tübingen Germany

Abstract

AbstractIn 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.

Funder

Deutsche Forschungsgemeinschaft

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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