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Updated: May 29, 2026
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
Engineering Supramolecular Metal-Organic Frameworks for Stable and Efficient Perovskite Quantum Dots by Defect
Tiantian Xu1, Hui Li1, Fei Yang1
1Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Photo-functional Molecular Materials and Theranostic, College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi Province 710069, China.
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Inorganic lead halide perovskite quantum dots (PQDs) feature exceptional optoelectronic properties but suffer from poor stability, limiting their commercial viability. This study employs a mechanochemical synthesis route utilizing shared cesium ion to synthesize CsPbBr3 PQDs within supramolecular γ-cyclodextrin metal-organic frameworks (γ-CD-MOFs). The resulting CsPbBr3@γ-CD-MOFs achieves high photoluminescence quantum yield (73%) alongside exceptional thermal, photochemical, and environmental stabilities. Mechanistic investigations reveal synergistic augmentation effects: multianchored defect passivation via γ-CD hydroxyl groups, enhanced radiative recombination through type-I heterojunction-driven directional carrier injection, and suppression of ion migration and phase separation by MOFs' physical barriers and interfacial chemical bonds. The composite was successfully applied in white light-emitting diodes, boasting color rendering index of 90.1 and color gamut coverage of 115%. Furthermore, benefiting from the good biocompatibility imparted by γ-CD-MOFs, the composite serves as fluorescent probe for specific labeling and imaging of lysosomes in living cells. This supramolecular-MOFs strategy provides design principles for developing stable, efficient, and biologically compatible PQDs, accelerating their optoelectronic and bioimaging applications.
