Han Zhang

ORCID: 0000-0003-4069-1769
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About
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Research Areas
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Luminescence and Fluorescent Materials
  • Organic Light-Emitting Diodes Research
  • Organic Electronics and Photovoltaics
  • Molecular Sensors and Ion Detection
  • Sulfur Compounds in Biology
  • Crystallography and molecular interactions
  • Nanoplatforms for cancer theranostics
  • Flood Risk Assessment and Management
  • Conducting polymers and applications
  • Tropical and Extratropical Cyclones Research
  • AI in cancer detection
  • Radiomics and Machine Learning in Medical Imaging
  • Supramolecular Chemistry and Complexes
  • Transition Metal Oxide Nanomaterials
  • Scoliosis diagnosis and treatment
  • Perovskite Materials and Applications
  • Medical Imaging and Analysis
  • Nitric Oxide and Endothelin Effects
  • Urban Stormwater Management Solutions
  • COVID-19 diagnosis using AI
  • Climate variability and models
  • Luminescence Properties of Advanced Materials
  • Lipid metabolism and biosynthesis

State Key Laboratory of Luminescent Materials and Devices
2018-2025

Hong Kong University of Science and Technology
2007-2025

University of Hong Kong
2018-2025

South China University of Technology
2017-2025

Beihang University
2024

Shanghai University
2022-2024

Tianjin Normal University
2024

Zaozhuang University
2021

Shaanxi University of Science and Technology
2021

Changchun University of Science and Technology
2021

Abstract Development of highly efficient circularly polarized organic light‐emitting diodes (CPOLEDs) has gained increasing interest as they show improved luminous efficiency and high contract 3D images in OLED displays. In this work, a series binaphthalene‐containing luminogenic enantiomers with aggregation‐induced emission (AIE) delayed fluorescence properties is designed synthesized. These molecules can emit from green to red light depending on the solvent polarity due twisted...

10.1002/adfm.201800051 article EN Advanced Functional Materials 2018-02-28

Abstract Actualizing full singlet exciton yield via a reverse intersystem crossing from the high‐lying triplet state to state, namely, “hot exciton” mechanism, holds great potential for high‐performance fluorescent organic light‐emitting diodes (OLEDs). However, incorporating comprehensive insights into mechanism and effective molecular design strategies still remains challenging. Herein, three blue emitters (CNNPI, 2TriPE‐CNNPI, 2CzPh‐CNNPI) with distinct local excited (LE) charge‐transfer...

10.1002/adfm.202002323 article EN Advanced Functional Materials 2020-07-09

Molecular rotor-based fluorophores (RBFs) have been widely used in many fields. However, the lack of control their viscosity sensitivity limits application. Herein, this problem is resolved by chemically installing extended π-rich alternating carbon-carbon linkages between rotational electron donors and acceptors RBFs. The data reveal that length linkage strongly influences sensitivity, likely resulting from varying height energy barriers fluorescent planar dark twisted configurations. Three...

10.1002/anie.202011108 article EN Angewandte Chemie International Edition 2020-09-29

Abstract Ultraviolet (UV) organic emitters that can open up applications for future light‐emitting diodes (OLEDs) are of great value but rarely developed. Here, we report a high‐quality UV emitter with hybridized local and charge‐transfer (HLCT) excited state its application in OLEDs. The emitter, 2BuCz‐CNCz, shows the features low‐lying locally (LE) emissive high‐lying reverse intersystem crossing (hRISC) process, which helps to balance color purity exciton utilization OLED. Consequently,...

10.1002/anie.202108540 article EN Angewandte Chemie International Edition 2021-08-13

Abstract The “hot exciton” mechanism based on high‐lying reverse intersystem crossing process has great advantages in achieving high‐performance deep‐blue organic light‐emitting diodes (OLEDs). Nevertheless, how to solve the loss of excitons improve device performance further is a pressing and challenging issue. To break through this shackle, novel emitter “exciton recovery” strategy successfully design, namely CAT. By combining transient absorption spectrum, theoretical calculation,...

10.1002/adfm.202212876 article EN Advanced Functional Materials 2023-01-05

Combining HLCT and AIE characteristics, six phenanthroimidazole derivatives were designed with different patterns for high-efficiency non-doped OLEDs.

10.1039/c9tc01453e article EN Journal of Materials Chemistry C 2019-01-01

Life process is amazing, and it proceeds against the eternal law of entropy increase through molecular motion takes energy from environment to build high-order complexity chaos achieve evolution with more sophisticated architectures. Inspired elegance life also effectively exploit undeveloped solid-state motion, two unique chiral Au(I) complexes were elaborately developed in this study, which their powders could realize a dramatic transformation nonemissive isolated crystallites emissive...

10.1021/jacs.0c06305 article EN Journal of the American Chemical Society 2020-07-28

BackgroundCholesteryl ester (CE) accumulation in intracellular lipid droplets (LDs) is an essential signature of clear cell renal carcinoma (ccRCC), but its molecular mechanism and pathological significance remain elusive.MethodsEnabled by the label-free Raman spectromicroscopy, which integrated stimulated scattering microscopy with confocal spectroscopy on same platform, we quantitatively analyzed LD distribution composition at single level intact ccRCC tissue specimens situ without any...

10.1016/j.ebiom.2024.105070 article EN cc-by-nc EBioMedicine 2024-04-01

A positively charged multifunctional AIEgen was developed for selective imaging and photodynamic killing of cancer cells as well Gram-positive bacteria.

10.1039/c8tb00572a article EN Journal of Materials Chemistry B 2018-01-01

Organic light-emitting diodes (OLEDs) with ultraviolet (UV) emission (λEL ≤ 400 nm) have attracted special attention in commercial and civil fields owing to their functions. Nevertheless, the lack of high-quality emitters restricts practical application UV OLEDs. Herein, a novel organic molecule desirable emission, 2Na-CzCN, is developed for Theoretical investigation indicates that it equipped hybridized local charge-transfer (HLCT) characteristics, which favor high-lying reverse intersystem...

10.1021/acsami.1c24285 article EN ACS Applied Materials & Interfaces 2022-02-16

Mono-substitutional BOPHY <bold>3a</bold> with a (<italic>p</italic>-dimethylamino)styryl group in the α-position was confirmed to be synthesized by Knoevenagel-type condensation. Dimethylamino-containing can used as pH probe.

10.1039/c4ra15914d article EN RSC Advances 2015-01-01

Abstract With rapid urbanization, inundation-induced property losses have become more and severe. Urban inundation modeling is an effective way to reduce these losses. This paper introduces a simplified urban stormwater simulation model based on the United States Environmental Protection Agency Storm Water Management Model (SWMM) geographic information system (GIS)-based diffusive overland-flow model. SWMM applied for computation of flows in storm sewer systems flooding at junctions, while...

10.2166/wst.2017.504 article EN Water Science & Technology 2017-09-25

A novel aggregation-induced emission (AIE) system with high solid-state efficiency is established by oxidizing thieno[3,2-<italic>b</italic>]thiophene to <italic>S</italic>,<italic>S</italic>-dioxide.

10.1039/c6tc05116b article EN Journal of Materials Chemistry C 2017-01-01

Background: N -nitroso compounds are hypothesized human bladder carcinogens. We investigated ingestion of compound precursors nitrate and nitrite from drinking water diet cancer in the New England Bladder Cancer Study. Methods: Using historical measurements for public supplies measured modeled values private wells, as well self-reported intake, we estimated average concentrations (mg/L NO 3 -N) daily intake (mg/d) 1970 to diagnosis/reference date (987 cases 1,180 controls). overall...

10.1097/ede.0000000000001112 article EN Epidemiology 2019-10-02

Abstract There remains an urgent demand for high‐quality blue luminogens that can simultaneously achieve high photoluminescence quantum yield (PLQY) in film and exciton utilization efficiency (EUE) the electroluminescence (EL) process. In this study, a referable molecular design strategy is developed via constructing low‐lying locally excited (LE) state with aggregation‐induced emission (AIE) characteristic high‐lying charge‐transfer (CT) effective triplet‐to‐singlet conversion channel....

10.1002/adom.201902195 article EN Advanced Optical Materials 2020-03-05

Abstract High‐efficiency non‐doped deep‐blue organic light‐emitting diodes (OLEDs) meeting the standard of BT.2020 color gamut is desired but rarely reported. Herein, an asymmetric structural engineering based on crossed long‐short axis (CLSA) strategy developed to obtain three new emitters (BICZ, PHDPYCZ, and PHPYCZ) with a hot‐exciton characteristic. Compared 2BuCz‐CNCz featuring symmetric single hole‐transport framework, these introduction different electron‐transport units show...

10.1002/advs.202407254 article EN cc-by Advanced Science 2024-08-20

Abstract Climate warming is expected to occur with an increased magnitude of extreme precipitation and sea level rise, which leads probability waterlogging in coastal cities. In this paper, a combined model developed evaluate the impact climate change on Guangzhou by using eight models four emissions scenarios [Special Report Emissions Scenarios (SRES) scenario A1B representative concentration pathway (RCP) RCP2.6, RCP4.5, RCP8.5]. The copula method was applied derive bivariate distributions...

10.1175/jhm-d-16-0157.1 article EN other-oa Journal of Hydrometeorology 2017-03-30

Abstract In contrast to the common intramolecular charge transfer (ICT) emission, planarized (PLICT) based materials usually possess higher proportion radiative decay for their flat and rigid conformation in excited states. Herein, a strategy designing PLICT‐based emitters by state quinone‐conformation induced planarization is proposed. By virtue of RIR mechanism on TPP (tetraphenylpyrazinyl) unit, newcomers named as TPP‐PPI...

10.1002/adom.201900283 article EN Advanced Optical Materials 2019-06-05

By utilizing a pH-responsive ratiometric AIEgen, dihydro berberine (dhBBR), ion trapping phenomenon was successfully visualized.

10.1039/d0sc02097d article EN Chemical Science 2020-01-01

In this work, a near-ultraviolet (NUV) emitter, 2MCz-CNMCz, with hot-exciton property is designed based on "long-short axis" strategy, which exhibits good thermal stability, bipolar carrier transport ability, and high T1 energy level. Its nondoped NUV organic light-emitting diode (OLED) achieves record maximum external quantum efficiency (ηext ) of 7.76%, peak at 404 nm CIE coordinates (0.158, 0.039). The corresponding exciton utilization (ηr in the electroluminescence process reveals its...

10.1002/smll.202204029 article EN Small 2022-09-09
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