Xianjie Liu

ORCID: 0000-0002-3190-2774
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About
Contact & Profiles
Research Areas
  • Conducting polymers and applications
  • Organic Electronics and Photovoltaics
  • Perovskite Materials and Applications
  • Graphene research and applications
  • Carbon Nanotubes in Composites
  • Molecular Junctions and Nanostructures
  • Quantum Dots Synthesis And Properties
  • Organic Light-Emitting Diodes Research
  • Advanced Photocatalysis Techniques
  • Fullerene Chemistry and Applications
  • Advanced Sensor and Energy Harvesting Materials
  • Electrocatalysts for Energy Conversion
  • ZnO doping and properties
  • Electrochemical sensors and biosensors
  • Copper-based nanomaterials and applications
  • Phase Change Materials Research
  • Advancements in Battery Materials
  • Analytical Chemistry and Sensors
  • Supercapacitor Materials and Fabrication
  • Gas Sensing Nanomaterials and Sensors
  • Electrochemical Analysis and Applications
  • Diamond and Carbon-based Materials Research
  • Ga2O3 and related materials
  • Advanced oxidation water treatment
  • Chalcogenide Semiconductor Thin Films

Linköping University
2016-2025

Chongqing Metrology Quality Inspection and Research Institute
2023-2025

Chongqing University
2025

Southwest Petroleum University
2018-2024

China Medical University
2016-2024

China University of Geosciences (Beijing)
2021-2024

First Hospital of China Medical University
2016-2024

Leibniz Institute for Solid State and Materials Research
2001-2023

Sichuan University
2023

Anhui Agricultural University
2023

Mass production of high-quality graphene sheets is essential for their practical application in electronics, optoelectronics, composite materials, and energy-storage devices. Here we report a prompt electrochemical exfoliation into aqueous solutions different inorganic salts ((NH4)2SO4, Na2SO4, K2SO4, etc.). Exfoliation these electrolytes leads to with high yield (>85%, ≤3 layers), large lateral size (up 44 μm), low oxidation degree (a C/O ratio 17.2), remarkable hole mobility 310 cm2 V–1...

10.1021/ja5017156 article EN Journal of the American Chemical Society 2014-03-31

Highly uniform, ultrathin, layer-by-layer heteroatom (N, B) co-doped graphene films are fabricated for high-performance on-chip planar micro-supercapacitors with an ultrahigh volumetric capacitance of ∼488 F cm−3 and excellent rate capability due to the synergistic effect nitrogen boron co-doping. As a service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized online delivery, but not copy-edited or typeset....

10.1002/adma.201401228 article EN Advanced Materials 2014-04-29

Developing environmentally friendly perovskites has become important in solving the toxicity issue of lead-based perovskite solar cells. Here, first double (Cs2 AgBiBr6 ) cells using planar structure are demonstrated. The prepared Cs2 films composed high-crystal-quality grains with diameters equal to film thickness, thus minimizing grain boundary length and carrier recombination. These high-quality show long electron-hole diffusion lengths greater than 100 nm, enabling fabrication resulting...

10.1002/adma.201706246 article EN Advanced Materials 2018-03-30

Record power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have been obtained with the organic hole transporter 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenyl-amine)9,9'-spirobifluorene (spiro-OMeTAD). Conventional doping spiro-OMeTAD hygroscopic lithium salts and volatile 4-tert-butylpyridine is a time-consuming process also leads to poor device stability. We developed new strategy for that avoids post-oxidation by using stable radicals as dopant ionic modulator (referred...

10.1126/science.abo2757 article EN Science 2022-07-28

A mixed ionic–electronic conductor based on nanofibrillated cellulose composited with poly(3,4-ethylene-dioxythio­phene):­poly(styrene-sulfonate) along high boiling point solvents is demonstrated in bulky electrochemical devices. The electronic and ionic conductivities of the resulting nanopaper are exploited devices which exhibit record values for charge storage capacitance (1F) supercapacitors transconductance (1S) transistors. In coming decades, a large amount extra electrical power must...

10.1002/advs.201500305 article EN cc-by Advanced Science 2015-12-02

Conducting polymers, such as the p-doped poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), have enabled development of an array opto- and bio-electronics devices. However, to make these technologies truly pervasive, stable easily processable, n-doped conducting polymers are also needed. Despite major efforts, no n-type equivalents benchmark PEDOT:PSS exist date. Here, we report on poly(benzimidazobenzophenanthroline):poly(ethyleneimine) (BBL:PEI) ethanol-based conductive...

10.1038/s41467-021-22528-y article EN cc-by Nature Communications 2021-04-21

Abstract Nonfullerene (NF) organic solar cells (OSCs) have been attracting significant attention in the past several years. It is still challenging to achieve high‐performance flexible NF OSCs. acceptors are chemically reactive and tend react with low‐temperature‐processed low‐work‐function (low‐WF) interfacial layers, such as polyethylenimine ethoxylated (PEIE), which leads “S” shape current‐density characteristics of cells. In this work, chemical interaction between active layer polymer...

10.1002/adma.201806616 article EN Advanced Materials 2019-01-17

Ternary architecture is one of the most effective strategies to boost power conversion efficiency (PCE) organic solar cells (OSCs). Here, an OSC with a ternary featuring highly crystalline molecular donor DRTB-T-C4 as third component host binary system consisting polymer PM6 and nonfullerene acceptor Y6 reported. The used achieve enhanced balanced charge transport, contributing improved fill factor (FF) 0.813 yielding impressive PCE 17.13%. heterojunctions are designed using so-called...

10.1002/adma.202002344 article EN Advanced Materials 2020-07-19

Abstract Energy level alignment (ELA) at donor (D) -acceptor (A) heterojunctions is essential for understanding the charge generation and recombination process in organic photovoltaic devices. However, ELA D-A interfaces largely underdetermined, resulting debates on fundamental operating mechanisms of high-efficiency non-fullerene solar cells. Here, we systematically investigate its depth-dependent variation a range donor/non-fullerene-acceptor by fabricating characterizing quasi bilayers...

10.1038/s41467-022-29702-w article EN cc-by Nature Communications 2022-04-19

Abstract Organic electrochemical transistors (OECTs) are being researched for various applications, ranging from sensors to logic gates and neuromorphic hardware. To meet the requirements of these diverse device fabrication process must be compatible with flexible scalable digital techniques. Here, we report a direct-write additive fabricate fully 3D-printed OECTs, using 3D printable conducting, semiconducting, insulating, electrolyte inks. These which operate in depletion mode, can...

10.1038/s41528-023-00245-4 article EN cc-by npj Flexible Electronics 2023-03-07

Reducing interface nonradiative recombination is important for realizing highly efficient perovskite solar cells. In this work, we develop a synergistic bimolecular interlayer (SBI) strategy via 4-methoxyphenylphosphonic acid (MPA) and 2-phenylethylammonium iodide (PEAI) to functionalize the interface. MPA induces an in-situ chemical reaction at surface forming strong P-O-Pb covalent bonds that diminish defect density upshift Fermi level. PEAI further creates additional negative dipole so...

10.1038/s41467-024-50019-3 article EN cc-by Nature Communications 2024-07-04

Conducting polymers have recently been suggested as thermoelectric materials for use in large-area thermogenerators. To help assessing the feasibility of this electrical conductivity and Seebeck coefficient a series heavily doped regioregular poly(3-hexylthiophene) films are measured between 220 370 K. $p$-type chemical doping up to 34% is accompanied by introduction negatively charged counterions, ${\text{PF}}_{6}^{\ensuremath{-}}$. The counterions produce disordered environment within...

10.1103/physrevb.82.115454 article EN Physical Review B 2010-09-30

The biomolecular mechanism of nickel carcinogenicity is driven by intracellular Ni cation. role catalyst in single-wall carbon nanotube toxicity will therefore depend on its bioavailability, which highly uncertain due to encapsulation shells. This article measures the material-specific release into extra- and physiological fluid phases suggests practical techniques for managing metals contribution SWNT toxicity. Supporting information this available WWW under...

10.1002/adma.200602696 article EN Advanced Materials 2007-08-23

Abstract The electrolysis processes such as hydrogen evolution reaction (HER) require high efficient catalysts with robust surface stability. A conductivity is also necessary to speed up the charge transport between catalyst and electrolyte. Recently, observation of exceedingly in topological semimetal MoP, has provided a model investigate correlation electrical electrocatalytic activity for HER. Thus, MoP encapsulated Mo, P codoped carbon layer (MoP@C). This composite material exhibits...

10.1002/aenm.201801258 article EN cc-by-nc-nd Advanced Energy Materials 2018-06-25
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