Jiefeng Hai

ORCID: 0000-0001-5018-2883
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About
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Research Areas
  • Organic Electronics and Photovoltaics
  • Conducting polymers and applications
  • Perovskite Materials and Applications
  • Advanced Photocatalysis Techniques
  • Organic Light-Emitting Diodes Research
  • Semiconductor materials and interfaces
  • Quantum Dots Synthesis And Properties
  • 2D Materials and Applications
  • Nanowire Synthesis and Applications
  • Covalent Organic Framework Applications
  • Fullerene Chemistry and Applications
  • Analytical Chemistry and Chromatography
  • Microfluidic and Capillary Electrophoresis Applications
  • Thin-Film Transistor Technologies
  • Copper-based nanomaterials and applications
  • Innovative Microfluidic and Catalytic Techniques Innovation
  • Molecular Junctions and Nanostructures
  • Gas Sensing Nanomaterials and Sensors
  • Advancements in Battery Materials
  • Synthesis and properties of polymers
  • Sulfur-Based Synthesis Techniques
  • Graphene research and applications
  • Organic Chemistry Cycloaddition Reactions
  • Chalcogenide Semiconductor Thin Films
  • solar cell performance optimization

Guilin University of Technology
2016-2024

HKUST Shenzhen Research Institute
2021

University of Hong Kong
2021

Anshan Hospital
2021

Bioengineering Center
2019-2020

Nanjing University of Science and Technology
2010-2016

Nanjing Library
2014

Abstract The severe aggregation property of the small molecule electron‐transporting layer (ETL) not only deteriorates photovoltaic performance and operational reliability but also constrains its compatibility with large‐scale coating techniques. Herein, by applying N,N′‐Bis{3‐[3‐(Dimethylamino)propylamino]propyl}perylene‐3,4,9,10‐tetracarboxylic diimide (PDINN) (a well‐known ETL) as a demo, solvent‐induced anti‐aggregation (SIAA) strategy is proposed to cope these hurdles via mixing ethanol...

10.1002/aenm.202203009 article EN Advanced Energy Materials 2022-11-06

Abstract The elaborate balance between the open‐circuit voltage ( V OC ) and short‐circuit current density J SC is critical to ensure efficient organic solar cells (OSCs). Herein, chalcogen containing branched chain engineering employed address this dilemma. Three novel nonfullerene acceptors (NFAs), named BTP‐2O , BTP‐O‐S BTP‐2S featuring different peripheral chains are synthesized. Compared with symmetric grafting two alkoxy or alkylthio chains, asymmetric one shows mediate absorption...

10.1002/adfm.202213429 article EN Advanced Functional Materials 2023-02-13

Y14-based single-junction semitransparent inverted OSCs achieved a high power conversion efficiency of 12.67%.

10.1039/c9qm00499h article EN Materials Chemistry Frontiers 2019-01-01

Abstract The ternary strategy has proven effective in enhancing the performance of organic solar cells (OSCs), yet identifying optimal third component remains a challenge due to lack theoretical frameworks for predicting its impact based on molecular structure. This study addresses this by proposing quantitative parameters derived from surface electrostatic potential (ESP) as criteria selecting components. asymmetric acceptor BTP‐OS, which exhibits lower total average ESP and larger...

10.1002/adfm.202415499 article EN Advanced Functional Materials 2024-10-09

Acceptor <bold>Y22</bold> with an asymmetric hexacyclic A–DA′D–A structure achieved a high PCE of 15.4% and <italic>J</italic><sub>sc</sub> 24.37 mA cm<sup>−2</sup>, which are among the best values reported for acceptor based binary organic solar cells.

10.1039/d0ta01636e article EN Journal of Materials Chemistry A 2020-01-01

Abstract Hole transport materials (HTMs) play a significant role in device efficiencies and long‐term stabilities of perovskite solar cells (PSCs). In this work, two simple dopant‐free HTMs are designed with large conjugated electron‐deficient core. On the one hand, coplanar backbone endows enhanced π–π stacking reduced hole hopping distance. other incorporation unit can easily tune energy levels as well increase mobilities. Combining these advantages together,...

10.1002/adfm.202105458 article EN Advanced Functional Materials 2021-09-21

A methodology for versatile and direct access to 4,8-functionalized benzo[1,2-<italic>b</italic>:4,5-<italic>b</italic>′]dithiophenes with high mobilities is developed.

10.1039/c4ta01226g article EN Journal of Materials Chemistry A 2014-01-01

We report a series of NFAs (namely BTP-1V, BTP-2V, BTP-3V, and BTP-4V) by inserting vinylene π-bridges between the Y-series central fused core non-halogenated end group IC.

10.1039/d0ma01017k article EN cc-by Materials Advances 2021-01-01

Four new alternating copolymers of naphthodifuran and quinoxaline have been developed. With the bandgap as low 1.2 eV, polymers exhibited extended absorption to 1200 nm. Their potential in bulk heterojunction solar cells was evaluated. device optimization, triazoloquinoxaline based contributed highest power conversion efficiency 0.84%.

10.1039/c4nj00639a article EN New Journal of Chemistry 2014-07-17

Four benzodithiophene-triazoloquinoxaline alternating polymers, PBDTT-BTzQx-EH-C1, PBDT-BTzQx-EH-C1, PBDT-BTzQx-EH-C12 and PBDT-BTzQx-C12, have been designed synthesized to investigate the correlation of alkyl side chains with opto-electronic properties resulting polymers. The introduction onto thiophene spacer or quinoxaline unit lowers highest occupied molecular orbital energy level while excessive prevent polymer backbone from π–π stacking result in a decreased short circuit current fill...

10.1039/c3py01174g article EN Polymer Chemistry 2013-10-10

Two-dimensional polyfluorenes bearing thienylenevinylene-bridged malononitrile (PF-BTDCN) or diethylthiobarbituric acid accepting side chains (PF-BTDTA) have been successfully prepared. The polymers were fully characterized for their physicochemical, electrochemical, and photovoltaic properties. These exhibited greatly changed properties with the introduction of π-conjugated chains. enhancement current density bulk-heterojunction solar cells was observed when replacing PEDOT:PSS interfacial...

10.1021/jp4072718 article EN The Journal of Physical Chemistry C 2013-11-08

The PBDTT–TTz/PC<sub>61</sub>BM (1 : 2) devices with PFN as the cathode interfacial layer delivered a power conversion efficiency of 2.60% for polymer solar cells.

10.1039/c4nj02192d article EN New Journal of Chemistry 2015-01-01
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