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Medientyp:
E-Artikel
Titel:
High Quality Inkjet Printed‐Emissive Nanocrystalline Perovskite CsPbBr3 Layers for Color Conversion Layer and LEDs Applications
Beteiligte:
Vescio, Giovanni;
Frieiro, Juan Luis;
Gualdrón‐Reyes, Andrés F.;
Hernández, Sergi;
Mora‐Seró, Iván;
Garrido, Blas;
Cirera, Albert
Erschienen:
Wiley, 2022
Erschienen in:Advanced Materials Technologies
Sprache:
Englisch
DOI:
10.1002/admt.202101525
ISSN:
2365-709X
Entstehung:
Anmerkungen:
Beschreibung:
<jats:title>Abstract</jats:title><jats:p>Metal halide perovskites (MHPs) have shown outstanding optical emissive properties and can be employed in several optoelectronics devices. In contrast with materials of well‐established technologies, which are prone to degradation or require expensive processes, MHPs can be obtained by solution processing methods and increase stability. Inkjet printing is proposed as an industrial friendly technique to deposit MHPs. The inks have been developed from colloidal CsPbBr<jats:sub>3</jats:sub> nanocrystals and printing procedures that allow the deposition of thin layers with intense green emission. High emissive printed layers are assured by carrying out thermal annealing in vacuum oven, which is demonstrated to promote compact layers with low roughness, corroborated by SEM and AFM. XRD measurements show CsPbBr<jats:sub>3</jats:sub> crystalline layers with cubic symmetry and XPS provides insight into the stoichiometric composition and local bonding. Optical properties of inkjet‐printed CsPbBr<jats:sub>3</jats:sub> films have been analyzed by UV–vis absorbance and photoluminescence (PL), to extract the bandgap energy and photoluminescence quantum yield (PLQY). CsPbBr<jats:sub>3</jats:sub> printed layers emit at 524 nm with a narrow emission (FWHM ≈ 15 nm), exhibiting a PLQY up to 20%. These results enabled the large‐scale fabrication by inkjet printing of CsPbBr<jats:sub>3</jats:sub> color conversion layers (CCLs) and pave the way for flexible LEDs.</jats:p>