DataVXAdvanced Optical MaterialsPaper
journal article·2025-10Open access

Thermal/Water‐Stable CsPbX 3 @SiO x Core–Shell Quantum Dots for Inkjet Printing and Potential Color Converting Applications

Seong Yeon Park, Gayoung Seo, Taeyeon Kim, Carina Pareja‐Rivera, Fabian Pino, YoonGyo Kim, Jorge Simancas, Byeongsung Kim, Ignacio Utreras‐Asenjo, Jhonatan Rodriguez‐Pereira, Hyeonyeong Jo, JaeHong Park, Jin Ho Bang, Sofia Masi, Seog Joon Yoon, Iván Mora‐Seró, Andrés F. Gualdrón‐Reyes

Advanced Optical Materials· Volume 13· Issue 29
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Abstract

Abstract Ligand‐mediated surface passivation is widely used to fill defect sites and stabilize perovskite nanoparticles, keeping their photophysical properties unchanged. However, this strategy can promote the growth of agglomerates, quenching the luminescence of nanoparticles. Additionally, the presence of bulky ligands can hinder the interparticle carrier transport, difficulting the fabrication of efficient optoelectronic devices. In this work, the synthesis of SiO x ‐covered CsPbX 3 PQDs (CsPbX 3 @SiO x ) is performed through a modified ligand‐assisted reprecipitation method (LARP), by adding 3‐aminopropyl‐triethoxysilane (APTES) and oleic acid to the mixture reaction. Here, it is possible to suppress the aggregates formation, achieving water‐stable single core–shell PQDs with a photoluminescence quantum yield of up to 99.4% and facile bandgap modulation by varying the halide content. Accordingly, CsPbX 3 @SiO x PQDs inks are obtained for preparing inkjet‐printed QR codes and color converters, with stable luminescence up to 1.5 and 9 h of continuous operation at 2.5 V for Cl/Br‐ and Br‐perovskites, respectively. Interestingly, a PL splitting is observed for the Br/I‐perovskite along the time, indicating the emergence of halide migration to generate Br‐ and I‐rich domains, mediating the generation of white color emission. This contribution offers a prominent alternative to producing single PQDs with suitable optical properties and stability for developing promising LED technologies.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Perovskite Materials and Applications · Advanced Sensor and Energy Harvesting Materials · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry College of Natural Science Yeungnam University Gyeongsan 38541 Republic of Korea

Institute of Advanced Materials (INAM) Universitat Jaume I (UJI) Avenida de Vicent Sos Baynat, s/n Castellón de la Plana Castellón 12071 Spain

Facultad de Ciencias Instituto de Ciencias Químicas Universidad Austral de Chile Isla Teja Valdivia 5090000 Chile

Center of Materials and Nanotechnologies Faculty of Chemical Technology University of Pardubice Nam. Cs. Legii 565 Pardubice 53002 Czech Republic

Central European Institute of Technology Brno University of Technology Purkynova 123 Brno 61200 Czech Republic

Department of Chemistry and Nanoscience Ewha Womans University Seoul 03760 Republic of Korea

Department of Applied Chemistry Center for Bionano Intelligence Education and Research Hanyang University ERICA 55 Hanyangdaehak‐ro, Sangnok‐gu Ansan Gyeonggi‐do 15588 Republic of Korea

Department of Energy and Bio Sciences Hanyang University ERICA 55 Hanyangdaehak‐ro, Sangnok‐gu Ansan Gyeonggi‐do 15588 Republic of Korea

Funding

National Research Foundation of Korea · Ministry of Education · Universitat Jaume I · European Commission · Generalitat Valenciana · Agencia Nacional de Investigación y Desarrollo · Ministerio de Ciencia e Innovación

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