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Chiral dual-annihilator model for controllable photon upconversion and multi-dimensional optical modulation
2025 / Nature CommunicationsTriplet-triplet annihilation photon upconversion seeks efficient conversion of low-energy photons to high-energy emission. However, the triplet-triplet annihilation photon upconversion system faces limitations in emission gamut because efficient triplet-triplet energy transfer between sensitizer and annihilator relies on triplet energy matching, making it challen...
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Design of circularly polarized phosphorescence materials guided by transfer learning
2025 / Nature CommunicationsIt is highly desirable that artificial circularly polarized phosphorescent materials with high luminescence asymmetry factor (glum), narrowband emission and tunable chiral phosphorescent performance can be constructed. Especially, precise control and simultaneous independent switching of circularly polarized fluorescent and phosphorescent performance for the same...
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Mechanically-Tunable and Full-Color Circularly Polarized Long-Lived Phosphorescence in Chiral Superstructure Elastomers
2025 / Advanced MaterialsDeveloping full-color circularly polarized organic ultralong room-temperature phosphorescence (CP-OURTP) materials with high dissymmetry factor (glum) holds significant promise for diverse optoelectronic applications. Controlling glum values is crucial for enhancing the performance and functionality of these materials, as it directly influences their chiroptical ...
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Light-Dynamic Chirality Inversion of Circularly Polarized Organic Ultralong Room-Temperature Phosphorescence Enabled by Soft Helical Superstructure
2025 / Advanced Optical MaterialsDynamic and reversible manipulation of circularly polarized luminescence (CPL) in soft materials is highly desirable for advanced chiroptical devices, information encryption, and labeling technology. However, this remains a formidable challenge in circularly polarized organic ultralong room-temperature phosphorescence (CP-OURTP) materials. Herein, a bilayered chi...
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Highly Dissymmetric Circularly Polarized Luminescence via Multimode Chirality Enhancement in Hierarchically Ordered Liquid Crystal Films
2025 / Advanced Optical MaterialsCircularly polarized luminescence (CPL) in purely organic materials is limited by the almost exclusively electric nature of electronic transitions. Resolving this problem is possible through structuring organic materials at dimensions comparable to the wavelength of visible light. Here, the study explores the use of thin films made of chiral organic nanotubes for...
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Endowing single-crystal polymers with circularly polarized luminescence
2025 / Nature CommunicationsThe preparation of single-crystal polymers with circularly polarized luminesce (CPL) remains a challenging task in chemistry and materials science. Herein, we present the single-crystal-to-single-crystal topochemical photopolymerization of a chiral organic salt to achieve this goal. The in-situ reaction of 1,4-bis((E)-2-(pyridin-4-yl)vinyl)benzene (1) with chiral...
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Emergence of ferroelectricity in Sn-based perovskite semiconductor films by iminazole molecular reconfiguration
2025 / Nature CommunicationsFerroelectric semiconductors have the advantages of switchable polarization ferroelectric field regulation and semiconductor transport characteristics, which are highly promising in ferroelectric transistors and nonvolatile memory. However, it is difficult to prepare a Sn-based perovskite film with both robust ferroelectric and semiconductor properties. Here, by ...
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Mechanochromic 3D Soft Photonic Crystals Enabled Anticounterfeiting and Encryption Information Storage
2024 / Advanced Optical MaterialsInspired by the color-changing abilities of natural organisms, this research focuses on the design and fabrication of mechanochromic liquid crystal photonic crystal thin films with periodic self-assembly structures. Benefiting from its unique 3D self-assembled structure with a body-centered cubic lattice, BP I film exhibits excellent mechanical properties, charac...
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Optically Ambidextrous Reflection Circularly Polarized Luminescence Film with High Dissymmetry Factor and On-Demand Handedness
2024 / Advanced Optical MaterialsThe self-assembled cellulose nanocrystal (CNC) film has a left-handed layered structure, which makes the reflection of right-handed circularly polarized (CP) light a challenge. Herein, a nematic phase layer is designed and inserted into the chiral organization, to work as a half-wave retarder and make the ambidextrous CP light reflection. The maximum reflectivity...
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Dual-direction Circularly Polarized Luminescence Materials With On-demand Handedness and Superior Flexibility
2024 / Advanced Functional MaterialsThis work utilizes the self-assembled cellulose nanocrystals (CNCs) as the host chiral template and fabricates a circularly polarized luminescence (CPL) film. By manipulating the photonic bandgap, the synthesized film integrates a strong CPL signal and superior mechanical flexibility. Without losing the CPL activity, the ultimate strain of 19% has exceeded most C...
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Mixed-Ligand Chiral Quasi-2D Perovskites for Standard and Deep Blue CP-LEDs
2024 / Advanced Functional MaterialsThis study presents the development of mixed-ligand quasi-2D perovskites ((2-PEA)x(R/S-2-BA)2MA1Cs1Pb3Br10+x, x = 0.8, 1.6, 2.4) for circularly polarized light-emitting diodes (CP-LEDs). By utilizing the strong confinement effect of 2-phenylethylammonium (2-PEA) and the chirality of R/S-2-butylammonium (R/S-2-BA), room-temperature circularly polarized luminescenc...
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Pathway-directed recyclable chirality inversion of coordinated supramolecular polymers
2024 / Nature CommunicationsIt remains challenging to elucidate the fundamental mechanisms behind the dynamic chirality inversion of supramolecular assemblies with pathway complexity. Herein, metal coordination driven assembly systems based on pyridyl-conjugated cholesterol (PVPCC) and metal ions (Ag+ or Al3+) are established to demonstrate pathway-directed, recyclable chirality inversion a...
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Processable Circularly Polarized Luminescence for the Synthesis of Chiral Plasmonic Nanoparticles
2024 / Advanced Optical MaterialsCircularly polarized light is previously shown as a chiral bias to enable the synthesis of chiral plasmonic nanomaterials through light-matter interactions. The traditional approach for circularly polarized light generation relies on a “top-down” approach by removing undesired light polarization through optics, which suffers from energy loss and compati...
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Wide-range tunable circularly polarized luminescence in triphenylamine supramolecular polymers via charge-transfer complexation
2024 / Nature CommunicationsCircularly polarized luminescence materials with broad color tunability are highly valuable for applications in 3D display and photonic technologies. Here we show that incorporating intermolecular charge-transfer complexation into chiral supramolecular polymers is an efficient strategy to achieve this objective. Adjusting the charge-transfer strength between trip...
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Spatiotemporally modulated full-polarized light emission for multiplexed optical encryption
2024 / Nature CommunicationsSpatiotemporal control of full freedoms of polarized light emission is crucial in multiplexed optical computing, encryption and communication. Although recent advancements have been made in active emission or passive conversion of polarized light through solution-processed nanomaterials or metasurfaces, these design paths usually encounter limitations, such as sm...
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