Xiaofei Ji

ORCID: 0009-0004-0612-3316
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About
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Research Areas
  • Perovskite Materials and Applications
  • Conducting polymers and applications
  • Organic Electronics and Photovoltaics
  • Quantum Dots Synthesis And Properties
  • Organic Light-Emitting Diodes Research
  • Chalcogenide Semiconductor Thin Films
  • Carbon Nanotubes in Composites
  • Fiber-reinforced polymer composites
  • Natural Fiber Reinforced Composites
  • Industrial Vision Systems and Defect Detection
  • Membrane Separation and Gas Transport
  • Energetic Materials and Combustion
  • Thermal and Kinetic Analysis
  • Geotechnical Engineering and Analysis
  • Geological Studies and Exploration
  • Power Line Communications and Noise
  • Wireless Communication Networks Research
  • Carbon Dioxide Capture Technologies
  • Covalent Organic Framework Applications
  • Nanowire Synthesis and Applications
  • Geothermal Energy Systems and Applications
  • Advanced Technology in Applications
  • CO2 Sequestration and Geologic Interactions
  • Video Surveillance and Tracking Methods
  • Human Pose and Action Recognition

Shanghai Advanced Research Institute
2023-2025

Chinese Academy of Sciences
2023-2025

Institute of Coal Chemistry
2025

Shenyang Aerospace University
2024

Nankai University
2020-2023

Southern University of Science and Technology
2021-2023

Suzhou Institute of Nano-tech and Nano-bionics
2023

Qingdao University
2022

Donghua University
2015-2018

Material (Belgium)
2015

Two-dimensional (2D) perovskites are emerging photovoltaic materials because of their highly tunable photophysical properties and improved environmental stability in comparison with 3D perovskites. Here, a thiophene-based bulky dication spacer, namely, 2,5-thiophenedimethylammonium (ThDMA), was developed applicated 2D Dion-Jacobson (DJ) perovskite. High-quality DJ perovskite, (ThDMA)(MA)n-1PbnI3n+1 (nominal n = 5), crystallinity, preferred vertical orientation, enlarged spatially resolved...

10.1021/jacs.0c03363 article EN Journal of the American Chemical Society 2020-06-01

The buried interface in perovskite solar cells (PSCs) is pivotal for achieving high efficiency and stability. However, it challenging to study optimize the due its non-exposed feature. Here, a facile effective strategy developed modify SnO2 /perovskite by passivating defects modulating carrier dynamics via incorporating formamidine oxalate (FOA) nanoparticles. Both formamidinium ions show longitudinal gradient distribution layer, mainly accumulating at interface, which enables high-quality...

10.1002/adma.202303665 article EN Advanced Materials 2023-07-17

Abstract Developing dopant‐free hole transport materials (HTMs) to replace Spiro‐OMeTAD is a challenging but urgent issue for commercialization of state‐of‐the‐art n‐i‐p structured perovskite solar cells (PSCs). Here, this work proposes an effective two‐dimensional conjugate engineering strategy tune molecular stacking orientation and improve the mobility small molecule HTMs. For first time, triphenylamine (TPA) groups are incorporated as side chains benzo [1,2‐b:4,5‐b′]dithiophene (BDT)...

10.1002/aenm.202203756 article EN Advanced Energy Materials 2023-01-26

Constructing low-dimensional/three-dimensional (LD/3D) perovskite solar cells can improve efficiency and stability. However, the design selection of LD capping materials are incredibly scarce for inverted (PSCs) because layers often favor hole extraction impede electron extraction. Here, we develop a facile effective strategy to modify surface by passivating defects modulating electrical properties incorporating morpholine hydriodide (MORI) thiomorpholine (SMORI) on surface. Compared with PI...

10.1021/jacs.3c13576 article EN Journal of the American Chemical Society 2024-03-08

Charge carrier nonradiative recombination (NRR) caused by interface defects and nonoptimal energy level alignment is the primary factor restricting performance improvement of perovskite solar cells (PSCs). Interfacial modification a vital strategy to restrain NRR enable high-performance PSCs. We report here two interfacial materials, PhI-TPA BTZI-TPA, consisting phthalimide 2,1,3-benzothiadiazole-5,6-dicarboxylicimide core, respectively. The difunctionalized BTZI-TPA with imide thiadiazole...

10.1021/acsnano.2c01547 article EN ACS Nano 2022-07-22

Abstract The dielectronic constant of organic semiconductor materials is directly related to its molecule dipole moment, which can be used guide the design high‐performance photovoltaic materials. Herein, two isomeric small acceptors, ANDT‐2F and CNDT‐2F, are designed synthesized by using electron localization effect alkoxy in different positions naphthalene. It found that axisymmetric exhibits a larger improve exciton dissociation charge generation efficiencies due strong intramolecular...

10.1002/marc.202300213 article EN Macromolecular Rapid Communications 2023-05-26

The pursuit of efficient CO2 capture materials remains an unmet challenge. Especially, meeting both high sorption capacity and fast uptake kinetics is ongoing effort in the development sorbents. Here, a strategy to exploit liquid-in-aerogel porous composites (LIAPCs) that allow for highly effective selective /N2 separation, reported. Interestingly, functional liquid tetraethylenepentamine (TEPA) partially filled into air pockets SiO2 aerogel with left permanent porosity. Notably, confined...

10.1002/smll.202302627 article EN Small 2023-06-07

Abstract [4‐(3,6‐dimethyl‐9H‐carbazol‐9‐yl)butyl]phosphonic acid (Me‐4PACz) consistently exhibits inhomogeneous distribution on the substrate, which makes it a challenge for growth of high‐quality perovskite film, resulting in undesired interfacial losses at buried interfaces. Moreover, flexible alkyl chains Me‐4PACz are not conducive to intermolecular interactions and hinder charge flow. Here, novel molecule with 4‐Methoxy‐N‐(4‐methoxyphenyl)‐N‐phenylaniline (TPA) carbazole backbone, named...

10.1002/smll.202502367 article EN Small 2025-03-17

An efficiency of 21.31% was achieved with enhanced stability for a mixed HTM-based device because the high hole mobility, low reorganization energy and surface passivate effect DRSBDT-2OT component.

10.1039/c9ta13365h article EN Journal of Materials Chemistry A 2020-01-01

Solution-processed hole contact materials, as an indispensable component in perovskite solar cells (PSCs), have been widely studied with consistent progress achieved. One bottleneck for the commercialization of PSCs is lack materials high performance, cost-effective preparation, and green-solvent processability. Therefore, development versatile great significance. Herein, we report two novel donor-acceptor (D-A)-type molecules (FMPA-BT-CA 2FMPA-BT-CA) low cost alcohol-based processability by...

10.1021/acsami.2c10758 article EN ACS Applied Materials & Interfaces 2022-09-16

Abstract Inverted perovskite solar cells (PSCs) are preferred for tandem applications due to their superior compatibility with diverse bottom cells. However, the solution processing and low formation energy of perovskites inevitably lead numerous defects at both bulk interfaces. We report a facile effective strategy precisely modulating by incorporating AlO x deposited atomic layer deposition (ALD) on top interface. find that Al 3+ can not only infiltrate phase interact halide ions suppress...

10.1002/anie.202407766 article EN cc-by-nc-nd Angewandte Chemie International Edition 2024-05-23

In recent years, perovskite/silicon tandem solar cells have emerged as a research hotspot in the field of cells. For high-efficiency cells, crystallinity and defect control of...

10.1039/d5tc01104c article EN Journal of Materials Chemistry C 2025-01-01

10.1088/1674-4926/42/8/080202 article EN Journal of Semiconductors 2021-07-28

Abstract Inverted perovskite solar cells (PSCs) are preferred for tandem applications due to their superior compatibility with diverse bottom cells. However, the solution processing and low formation energy of perovskites inevitably lead numerous defects at both bulk interfaces. We report a facile effective strategy precisely modulating by incorporating AlO x deposited atomic layer deposition (ALD) on top interface. find that Al 3+ can not only infiltrate phase interact halide ions suppress...

10.1002/ange.202407766 article EN cc-by-nc-nd Angewandte Chemie 2024-05-23

The plasticized spinning and cyclization behaviors of polyacrylonitrile (PAN) polyacrylonitrile/functionalized carbon nanotube (PAN/CNT-COOH) composite fibers were studied.

10.1039/c5ra05696a article EN RSC Advances 2015-01-01

The hygroscopic dopants used in Spiro‐OMeTAD hole‐transport materials (HTMs) n –i– p perovskite solar cells (PSCs) inevitably cause device degradation. Herein, two polymer interface based on lead anchoring groups are developed. It is found that 2D polymers 2DP‐BT and 2DP‐Por can form dense films exhibit excellent hydrophobicity. Importantly, passivate the surface defects through noncovalent interactions, reducing nonradiative recombination loss. After introducing these between layer HTM...

10.1002/solr.202300961 article EN Solar RRL 2023-12-28

The morphological and structural properties of plasticized spinning polyacrylonitrile (PAN) fibers during the stabilization process were investigated.

10.1039/c5ra14391h article EN RSC Advances 2015-01-01

A bidentate ligand 1,10-phenanthroline enables a green-solvent-processable low-cost hole-transport material<bold>M1</bold>, which efficiently passivates the Pb<sup>2+</sup>ion defects of perovskite toward high-performance inverted solar cells.

10.1039/d1tc02053f article EN Journal of Materials Chemistry C 2021-01-01

To maximize the power conversion efficiency (PCE) and stability of perovskite/silicon tandem solar cells (TSCs), high‐performance stable perovskite top with wide‐bandgaps are required. A 2D/3D wide‐bandgap a bandgap 1.69 eV using 1H‐1,2,4‐triazole‐1‐carboximidamide (1‐TzFACl) as spacer is developed. The shows better film quality, enhanced crystallinity, suppressed nonradiative recombination, significantly improved phase stability. Its initial PCE (21.58%) remains above 87% after 1560 h...

10.1002/solr.202400189 article EN Solar RRL 2024-04-08
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