Patterning Perovskite Quantum Dots Using Photopolymerization

Morinaga, Mamoru; Iwaki, Takuto; Tanaka, Hisataka; Lagzi, István; Nakanishi, H.

doi:10.1021/acsami.2c23162

Cited by 5 publications

(10 citation statements)

References 57 publications

(101 reference statements)

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“…Notably, this manipulation of the light intensity is not feasible using photomasks. [ 18 ] Thus, the migration of CsPbBr 3 during photopolymerization was examined through the control of Δ I .…”

Section: Resultsmentioning

confidence: 99%

In Situ Observation of Perovskite Quantum Dots Driven by Photopolymerization Controlled Using a Digital Micromirror Device

Tanaka,

Lagzi,

Nakanishi

2023

Advanced Optical Materials

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Perovskite quantum dots (PQDs) are inherently unstable under environmental conditions, making it difficult to form patterns using conventional techniques. Herein, a unique approach is reported for patterning PQDs by the nonuniform photopolymerization of the liquid monomer. The demonstrated approach employs a PQD‐dispersed photocurable liquid, which is illuminated with the patterned light formed using a digital micromirror device (DMD). As the monomers are photopolymerized, the PQDs in the solution are patterned by diffusion (migration), and eventually, their pattern is imprinted on the film after photopolymerization. The migration process of the PQDs is in situ observed using an inverted‐type confocal microscope, and the patterning principle is examined by fine‐tuning the spatial distribution of the light intensity using the DMD. These findings will promote the generation of clear nanocrystal patterns with high contrasts and narrow line widths on films.

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Section: Resultsmentioning

confidence: 99%

In Situ Observation of Perovskite Quantum Dots Driven by Photopolymerization Controlled Using a Digital Micromirror Device

Tanaka,

Lagzi,

Nakanishi

2023

Advanced Optical Materials

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“…Reproduced with permission. [ 95 ] Copyright 2023, American Chemical Society.d) Demonstration of the properties of a composite film, with flexibility on the left and water resistance on the right. Reproduced with permission.…”

Section: Recent Advances In Quantum Dot‐polymer Direct Photolithographymentioning

confidence: 99%

“…Reproduced with permission. [ 95 ] Copyright 2023, American Chemical Society.e) Fluorescence microscope and high magnification confocal microscope images of the finished product, the inset is the pattern of the DMD used, and the scale is 500 µm. Reproduced with permission.…”

Section: Recent Advances In Quantum Dot‐polymer Direct Photolithographymentioning

confidence: 99%

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Direct Photolithography Patterning of Quantum Dot‐Polymer

Guo,

Chen,

et al. 2023

Adv Funct Materials

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For the new display technology based on quantum dots (QDs), achieving high‐precision red, green, and blue pixel arrays has always been a research focus in the pursuit of high‐quality and vivid image displays. However, problems such as material stability and process environment make it difficult to guarantee the quality of high‐precision patterns. The new optical patterning technology represented by direct photolithography is considered a highly promising method for achieving ultrafine patterns at the submicron level. This process prepares patterned quantum dot‐polymer films through light‐induced chemical changes. This paper reviews the progress of direct photolithography research focused on QD‐polymer materials and presents recent advances in such processes for monochromatic/multicolor light patterning. The article classifies QD‐polymers into three categories by combining QDs with polymers in different ways, including polymer‐coated QDs, polymers as QD ligands, and polymers as photocrosslinkers for QDs. Their synthesis schemes, functional features, and challenges are also presented. In addition, a scheme to remove the photomask during direct lithography using lasers and light field modulation is also proposed. It aims to provide readers and researchers with some generalized research information and improvement ideas. This can further advance the development of direct photolithography for QD‐polymers.

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“…Various methods have been employed to incorporate QDs onto or into polymers, such as in situ synthesis of QDs in the polymer by microwave-assisted synthesis, , physical immobilization of QDs into polymer matrices, electrostatic interaction between the polymer and QDs, − chemical oxidative polymerization in the presence of QDs, , and mainly, direct dispersion of QDs into photopolymers, , which also allows for additive manufacturing of fluorescent objects using TPP.…”

Section: Introductionmentioning

confidence: 99%

Quantum Dot Transfer from the Organic Phase to Acrylic Monomers for the Controlled Integration of Single-Photon Sources by Photopolymerization

Issa

Ritacco

et al. 2023

ACS Appl. Mater. Interfaces

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This paper reports on a new strategy for obtaining homogeneous dispersion of grafted quantum dots (QDs) in a photopolymer matrix and their use for the integration of single-photon sources by two-photon polymerization (TPP) with nanoscale precision. The method is based on phase transfer of QDs from organic solvents to an acrylic matrix. The detailed protocol is described, and the corresponding mechanism is investigated and revealed. The phase transfer is done by ligand exchange through the introduction of mono-2-(methacryloyloxy) ethyl succinate (MES) that replaces oleic acid (OA). Infrared (IR) measurements show the replacement of OA on the QD surface by MES after ligand exchange. This allows QDs to move from the hexane phase to the pentaerythritol triacrylate (PETA) phase. The QDs that are homogeneously dispersed in the photopolymer without any clusterization do not show any significant broadening in their photoluminescence spectra even after more than 3 years. The ability of the hybrid photopolymer to create micro- and nanostructures by two-photon polymerization is demonstrated. The homogeneity of emission from 2D and 3D microstructures is confirmed by confocal photoluminescence microscopy. The fabrication and integration of a single-photon source in a spatially controlled manner by TPP is achieved and confirmed by auto-correlation measurements.

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Patterning Perovskite Quantum Dots Using Photopolymerization

Cited by 5 publications

References 57 publications

In Situ Observation of Perovskite Quantum Dots Driven by Photopolymerization Controlled Using a Digital Micromirror Device

In Situ Observation of Perovskite Quantum Dots Driven by Photopolymerization Controlled Using a Digital Micromirror Device

Direct Photolithography Patterning of Quantum Dot‐Polymer

Quantum Dot Transfer from the Organic Phase to Acrylic Monomers for the Controlled Integration of Single-Photon Sources by Photopolymerization

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