A5030192542- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Asymmetric Synthesis and Catalysis
- Luminescence and Fluorescent Materials
- Strong Light-Matter Interactions
- Conducting polymers and applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Synthesis of heterocyclic compounds
- Sulfur-Based Synthesis Techniques
- Photonic and Optical Devices
- Thin-Film Transistor Technologies
- Catalytic C–H Functionalization Methods
- Synthesis and Catalytic Reactions
- Photochemistry and Electron Transfer Studies
- Organic Chemistry Synthesis Methods
- Biosensors and Analytical Detection
- Synthetic Organic Chemistry Methods
- Synthesis and biological activity
- Photonic Crystals and Applications
- Molecular Junctions and Nanostructures
- Advanced biosensing and bioanalysis techniques
- Marine Sponges and Natural Products
- Radical Photochemical Reactions
Institute of Process Engineering
2021-2025
Beijing University of Chinese Medicine
2024
Northwestern University
2019-2020
Capital Normal University
2019
Chongqing Medical University
2017-2018
Children's Hospital of Chongqing Medical University
2017-2018
Chinese Academy of Sciences
2007-2017
Beijing National Laboratory for Molecular Sciences
2008-2017
University of Chinese Academy of Sciences
2007-2017
Sichuan Agricultural University
2017
Abstract Achieving high-luminescence organic light-emitting devices (OLEDs) with narrowband emission and high color purity is important in various optoelectronic fields. Laser displays exhibit outstanding advantages next-generation display technologies owing to their ultimate visual experience, but this remains a great challenge. Here, we develop novel OLED based single crystals. By strongly coupling the exciton state an optical microcavity, obtain polariton electroluminescent (EL) from...
An organocatalytic [3 + 2]-annulation between isatin-derived Morita–Baylis–Hillman adducts and cyclic sulfonimines has been developed in high yields with excellent enantio- diastereoselectivities via an allylic nitrogen-ylide intermediate. The reaction provides access to heavily substituted aza-spirooxindole derivatives, which also contain ring fused sultams.
Three new low bandgap conjugated random copolymers, containing two acceptors diketopyrrolopyrrole (DPP) and benzothiadiazole (BTD) linked by thiophene donors, were designed synthesized using Pd-catalyzed Stille-coupling methods. The ratio between DPP BTD was varied from N = 3:7 to 1:1 7:3 in the polymer backbones. Thin-film device measurements indicate that these polymers exhibit different trends field-effect mobilities photovoltaic properties owing adjustable nanoscale film morphologies as...
Organic solid-state lasers (OSSLs) have been paid great attention due to their ease-of-fabrication, low cost and tailor-made molecular tunability. Optical gain materials of OSSLs are currently focused on fluorescent materials, which can bring only 25% exciton utilization for future current-injection spin statics under electrical excitation. While thermally active delayed (TADF) obtain a theoretical 100% internal quantum efficiency by harvesting triplet excitons. However, based TADF remain...
Thermally activated delayed fluorescent (TADF) emitters have received great attention in organic light-emitting diodes and laser because of high exciton utilization efficiency low optical loss caused by triplets. However, the direct observation lasing emission from nondoped TADF microcrystals has yet to be reported. Here, we demonstrated a three-color (green, yellow, red) microlaser three with well-controlled geometries. The temperature-dependent dynamic analyses testify that regenerated...
We develop linearly-polarized single-crystal OLEDs, which exhibit a degree of polarization 0.95 for electroluminescence, turn-on voltage 2.5 V, an exceptionally high brightness 200 000 cd m −2 , and current density surpassing 300 A cm .
Topological polaritons, combining the robustness of topologically protected edge states against defects and disorder with strong nonlinear properties polariton bosons, represent an excellent platform to investigate novel photonic topological phases. We demonstrate optical spin Hall effect (OSHE) its symmetry switching in exciton–polariton regime pure DPAVBi crystals. Benefiting from Rashba–Dresselhaus spin–orbit coupling, we observe separation left- right-circularly polarized emission...
Abstract The polarization or spin manipulation of photons attracts significant attention in modern photonics. However, the severe dispersion planar microcavities inevitably leads to difficulties achieving wavelength‐dependent photonic operation. In this study, pseudo‐spin polariton condensates an organic crystal‐filled microcavity is achieved, confirmed by corresponding emitted polarized light. By adjusting incident wavevector off‐resonant pumping laser, energies and polarizations can be...
A novel FeCl3-mediated reaction of 3-benzyl-2-oxindoles with styrene derivatives was developed. The provided spirocyclohexene oxindoles in good yields and excellent diastereoselectivities via a tandem radical addition/cyclization process.
Rational design of air-stable ambipolar polymeric semiconductors was achieved by covalently connecting naphthalenediimide (NDI) units with benzothiadiazole (BZ) through thiophene (T) linkers, namely, PNDI-mT(BZ)mT (m = 1, 2), in which well-coplanar mT(BZ)mT moieties as a whole act donors rather than acceptors reported previous studies. Decreasing the number linkers from m 2 to 1 lowers both LUMO and HOMO energy levels. As result, carriers organic thin film transistors (OTFTs) could be...
A tunable and highly regio- diastereoselective vinylogous Mannich-type reaction of dioxinone-derived silyl dienolate (1) with chiral N-tert-butanesulfinyl imino ester (2) was developed. By appropriate choice Lewis acid catalyst, two diastereomers the γ-product were obtained, respectively, dr up to 95:5. The procedure for Ag(I)-catalyzed also provided facile access α-regioisomer excellent diastereoselectivities (up >99:1 dr) by changing counterion Ag(I) salt.
Two donor–acceptor copolymers, PQB and PQBOC8, containing a donor component quinacridone an acceptor benzothiadiazole were synthesized. Introduction of two additional alkoxy chains onto the in PQBOC8 not only enhanced solubility molecular weight but also altered photo-electrochemical properties polymer chain conformation compared with PQB. As result, they exhibited different film microstructure transistor performance. Indeed, ordered lamellar structure chain-to-chain distance 21.5 Å π–π...
The control and active manipulation of spin-orbit coupling (SOC) in photonic systems are fundamental the development modern spin optics topological devices. Here, we demonstrate an artificial Rashba-Dresselhaus (RD) SOC mediated by photochemical reactions a microcavity filled with organic single crystal photochromic phase-change character. Splitting circular polarization components optical modes induced RD is observed experimentally momentum space. By applying ultraviolet light beam, spatial...
Abstract Two series of heterocyclic compounds, thiazolo[3,2‐ a ]benzimidazoles and benzimidazo[2,1‐ b ]‐1,3‐thiazines, were synthesized by the tunable base‐controlled regioselective cascade reaction 2‐mercaptobenzimidazole with Morita–Baylis–Hillman acetates nitroalkenes in good yields high regioselectivities.
The octyloxy-substituted polymer PNDIBTOC8 achieves a high PCE of 3.14% with <italic>V</italic><sub>oc</sub> 0.90 V in all-polymer solar cells, and aggregates into the dendrite-like phase separation blend films.
A transition from unipolar to ambipolar transport can be achieved by decreasing the thiophene linkers in backbone of<bold>PNDI-mT(DPP)mT</bold>.
Designing the polarization degree of freedom light is crucial in many fields and has widespread application in, for example, all-optical circuits. In this work, we find that an organic microcavity filled with anisotropic single crystals cavity modes can be modulated to elliptically polarized, i.e., partially circularly polarized linearly polarized. The circular component originates from Rashba–Dresselhaus spin splitting, while linear due dislocation modes. polarizations ascribed orientation...
To explore the clinical characteristics of patients infected with SARS-CoV-2 nationwide, especially effect factors asymptomatic infection and disappearance symptoms. A total 66,448 COVID-19 in China who have been diagnosed by nucleic acid test or rapid antigen were surveyed online (December 24, 2022 to January 16, 2023). Our cross-sectional study used descriptive analyses binary Logistics regression model assess correlation between relative factors, including age, gender, pre-existing...
Circularly polarized (CP) organic light-emitting diodes (OLEDs) have attracted attention in potential applications, including novel display and photonic technologies. However, conventional approaches cannot meet the requirements of device performance, such as high dissymmetry factor, directionality, narrowband emission, simplified structure, low costs. Here, we demonstrate spin-valley-locked CP-OLEDs without chiral emitters but based on spin-orbit coupling, where photons with opposite CP...
The improved performance of an all-polymer solar cell was attributed to the well-ordered structure polymer C3 and nanoscale phase separation in a blend film polymer, which resulted from manipulating alkyl-chain branching position polymer.