Pengfei Guo

ORCID: 0000-0003-0541-4256
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About
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Research Areas
  • Perovskite Materials and Applications
  • Quantum Dots Synthesis And Properties
  • Conducting polymers and applications
  • Plant and animal studies
  • Ecology and Vegetation Dynamics Studies
  • Chalcogenide Semiconductor Thin Films
  • Plant Parasitism and Resistance
  • Advanced Photocatalysis Techniques
  • Electrocatalysts for Energy Conversion
  • Insect and Arachnid Ecology and Behavior
  • Organic Light-Emitting Diodes Research
  • Advanced battery technologies research
  • Mobile Ad Hoc Networks
  • Opportunistic and Delay-Tolerant Networks
  • Catalytic Processes in Materials Science
  • Metal and Thin Film Mechanics
  • Catalysis and Oxidation Reactions
  • Vehicular Ad Hoc Networks (VANETs)
  • Advancements in Battery Materials
  • Diamond and Carbon-based Materials Research
  • Energy Efficient Wireless Sensor Networks
  • Electronic and Structural Properties of Oxides
  • Transition Metal Oxide Nanomaterials
  • Advanced ceramic materials synthesis
  • Advanced materials and composites

Guizhou University
2023-2025

Northwestern Polytechnical University
2014-2025

Hong Kong University of Science and Technology
2025

University of Hong Kong
2025

Zhengzhou University
2025

Guiyang College of Traditional Chinese Medicine
2023-2024

Qingdao University of Science and Technology
2021-2023

PLA Information Engineering University
2021-2023

Chinese Academy of Sciences
2017-2021

Yunnan Agricultural University
2017-2021

An effective strategy of surface & grain boundary co-passivation is demonstrated to access perovskite solar cells with 21.31% champion efficiency as well a highly improved stability less than 3% loss after 2500 hours at humidity 70%.

10.1039/c8ta11524a article EN Journal of Materials Chemistry A 2019-01-01

Abstract The ionic nature endows halide perovskites with intrinsic interfacial defects in the formed polycrystalline films, thus imposing challenge of synchronously passivating these low formation energies that directly account for unsatisfied performance perovskite solar cells (PSCs). By virtue theoretically proven capability a three to four times enhancement energy each defect Pb‐I antisite (Pb I ) and iodine vacancy (V ), new passivation molecule 1,10‐phenanthrolin‐5‐amine (PAA) is...

10.1002/adfm.202200534 article EN Advanced Functional Materials 2022-03-09

Kocourekia fusis Cao & Zhu sp. n. (Hymenoptera, Eulophidae) is described and illustrated as a parasitoid of aculeate Hymenoptera. Females differ from those the other two species in by presence malar sulcus, prompting re-examination generic limits. A re-definition presented, its relationship with closely allied genera Melittobia complex discussed, key to provided.

10.11646/zootaxa.4317.2.13 article EN Zootaxa 2017-09-04

Abstract Tackling the interfacial loss in emerged perovskite‐based solar cells (PSCs) to address synchronously carrier dynamics and environmental stability, has been of fundamental viable importance, while technological hurdles remain not only creating such mediator, but subsequent embedding active layer. This article reports a strategy hydrophobic fluorinated‐gold‐clusters (FGCs) for highly efficient stable PSCs. The p‐type semiconducting feature enables FGC mediator improve by reducing...

10.1002/adma.202101590 article EN Advanced Materials 2021-07-24

Abstract The rapid growth in the device efficiency of perovskite solar cells (PSCs) has raised great demands for tackling their long‐term stability upon external environmental stimuli that restricts commercialization PSCs, which instability exposure to moisture been one major obstacles. Herein, an effective way building up double barriers degradation films is demonstrated by modifying them with rationally selected hydrolyzable hydrophobic molecules (1H,1H,2H,2H‐perfluorooctyl...

10.1002/adfm.202002639 article EN Advanced Functional Materials 2020-05-28

Rationally managing the secondary-phase excess lead iodide (PbI2 ) in hybrid perovskite is of significance for pursuing high performance solar cells (PSCs), while challenge remains on its conversion to a homogeneous layer that robust stable against environmental stimuli. We herein demonstrate an effective strategy surface reconstruction converts PbI2 into gradient sulfate-silica bi-layer, which substantially stabilizes film and reduces interfacial charge transfer barrier PSCs device. The...

10.1002/anie.202300678 article EN Angewandte Chemie International Edition 2023-02-07

A multifunctional molecule at interface was explored to inhibit phase separation and passivate defects, producing perovskite solar cells with efficiencies of 21.82% (0.05 cm 2 ) 18.05% (1.92 1.67 eV bandgap excellent stability.

10.1039/d3ta02209a article EN Journal of Materials Chemistry A 2023-01-01

Abstract Electron transport layers (ETLs) with pronounced electron conducting capability are essential for high performance planar perovskite photovoltaics, the great challenge being that most widely used metal oxide ETLs unfortunately have intrinsically low carrier mobility. Herein is demonstrated by simply addressing loss at particle boundaries of TiO 2 ETLs, through embedding in ETL p–n heterointerfaces, mobility can be boosted three orders magnitude. Such encouragingly favorable both...

10.1002/adma.202300403 article EN Advanced Materials 2023-05-11

Pure-bromide quasi-2D perovskite (PBQ-2DP) promises high-performance light-emitting diodes (LEDs), while a challenge remains on control over its n-phase distribution for bright true-blue emission. Present work addresses the through exploring passivation molecule of amino acid with reinforced binding energy, which generates narrow preferentially at n = 3 true blue emission 478 nm. Consequently, peak external quantum efficiency 5.52% and record brightness 512 cd m–2 are achieved PBQ-2DP-based...

10.1021/acsami.2c19979 article EN ACS Applied Materials & Interfaces 2023-02-08

Improving the tribological properties of water by adding nanomaterials as water-based lubricant additive has garnered increasing interest for great potential in range applications. However, combining ideally two-dimensional layered and zero-dimensional nanoparticles to create synergistic enhancement lubricating performance under is still challenging. In this paper, a novel nanomaterial named aminated silica modified graphene oxide (SAG), which combines (GO) hydrophilic nanosilica (SiO2)...

10.1021/acsanm.8b01653 article EN ACS Applied Nano Materials 2018-11-01

Creating colloids of liquid metal with tailored dimensions has been technical significance in nano-electronics while a challenge remains for generating supranano (<10 nm) to unravel the mystery their unconventional functionalities. Present study pioneers technology pulsed laser irradiation from solid target liquid, and yields ternary nano-alloys that are laborious obtain via wet-chemistry synthesis. Herein, significant role on mediating electrons at grain boundaries perovskite films, which...

10.1002/adma.202001571 article EN Advanced Materials 2020-07-09

Abstract Ammonium iodides are intensively investigated as effective interfacial passivation agents in perovskite solar cells (PSCs) while facing a major challenge of their high reactivity with perovskites that undermines the operational stability PSCs. Exemplified by involving rationally designed/selected peptide into widely adopted phenethylammonium iodide (PEAI), present work demonstrates bespoke peptide‐PEAI can effectively inhibit deprotonation ammonium and thus hinder formation 2D...

10.1002/adfm.202405735 article EN Advanced Functional Materials 2024-06-12

Abstract Regulating the chemical/physical features of solution processed metal halide perovskite films by integrating sub‐10 nm nanocrystals is a highly promising strategy to advance their outstanding optoelectronic performance. However, significant challenges remain for universal embedding well‐defined in film matrix. By generating desired solvents via pulsed laser irradiation liquid, authors demonstrate effective decoration enhanced It believed that this improved performance due...

10.1002/aenm.201901341 article EN Advanced Energy Materials 2019-08-01

Abstract Formamidinium (FA)‐based perovskite promises high power conversion efficiency in photovoltaics while it faces awkward spontaneous yellow phase transition even at ambient conditions. This has spurred intensive efforts which leave a formidable challenge on robust anchoring of the soft lattice. Present work pioneers rational design interfacial ionic‐bonding between halogen‐terminated nano‐MXenes and for effective retarding lattice instability FA‐based perovskites. The heterointerface...

10.1002/aenm.202202395 article EN Advanced Energy Materials 2022-10-17

Human-induced biodiversity loss negatively affects ecosystem function, but the interactive effects of change across trophic levels remain insufficiently understood. We sampled arboreal spiders and lepidopteran larvae seasons in 2 years a subtropical tree diversity experiment, then disentangled links between arthropod predator by deconstructing pathways among multiple components (taxonomic, phylogenetic functional) with structural equation models. found that herbivores were major mediators...

10.1098/rspb.2022.1658 article EN Proceedings of the Royal Society B Biological Sciences 2023-01-11

We present in this work a synergetic modulation strategy on electronic structure and surface properties, which achieves 88.24% selectivity of dehydrogenation the C–H bond.

10.1039/d4ra08481k article EN cc-by-nc RSC Advances 2025-01-01

Pneumatic conveying technology is an efficient, energy-saving and environmentally friendly means of solid feed conveying. In the process pneumatic conveying, wind speed has a decisive influence on characteristics. Here, computational fluid dynamics coupled with discrete element method simulation experiment were combined, was used as experimental variable to study characteristics material in tube, such particle distribution state, phase mass concentration, coupling force feed, average...

10.3390/app15031109 article EN cc-by Applied Sciences 2025-01-23
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