A5004607795- Perovskite Materials and Applications
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Lanthanide and Transition Metal Complexes
- 2D Materials and Applications
- Luminescence and Fluorescent Materials
- Solid-state spectroscopy and crystallography
- Molecular Junctions and Nanostructures
- Thin-Film Transistor Technologies
- Graphene research and applications
- Advancements in Battery Materials
- ZnO doping and properties
- MXene and MAX Phase Materials
- Semiconductor Lasers and Optical Devices
- Liquid Crystal Research Advancements
- Photochromic and Fluorescence Chemistry
- Thermal Expansion and Ionic Conductivity
- Photoreceptor and optogenetics research
- Nanowire Synthesis and Applications
- Silicon and Solar Cell Technologies
- Copper-based nanomaterials and applications
- Advanced Computing and Algorithms
Beijing Jiaotong University
2016-2025
Guilin University of Electronic Technology
2021
Beijing Institute of Optoelectronic Technology
2016-2019
University of Hong Kong
2006-2017
Peking University
2011
University of East Anglia
2011
Chinese Academy of Sciences
1997-2006
Changchun Institute of Optics, Fine Mechanics and Physics
1997-2006
City University of Hong Kong
2001
Institute of Physics
1997-2000
Anomalously large interface charge in polarity-switchable photovoltaic devices indicates the amount of mobile ions organic–inorganic halide perovskites.
A new, all room-temperature solution process is developed to fabricate efficient, low-cost, and stable perovskite solar cells (PVSCs). The PVSCs show high efficiency of 17.10% 14.19%, with no hysteresis on rigid flexible substrates, respectively, which are the best efficiencies reported date for fabricated by solution-processed techniques. a remarkable power-per-weight 23.26 W g−1.
While methylammonium lead iodide (MAPbI3) with interesting properties, such as a direct band gap, high and well-balanced electron/hole mobilities, well long diffusion length, is potential candidate to become the light absorbers in photodetectors, challenges for realizing efficient perovskite photodetectors are suppress dark current, increase linear dynamic range, achieve specific detectivity fast response speed. Here, we demonstrate NiOx:PbI2 nanocomposite structures, which can offer dual...
While perovskite light‐emitting diodes typically made with high work function anodes and low cathodes have recently gained intense interests. Perovskite devices two electrodes interesting features are demonstrated here. Firstly, electroluminescence can be easily obtained from both forward reverse biases. Secondly, the results of impedance spectroscopy indicate that ionic conductivity in iodide (CH 3 NH PbI ) is large a value ≈10 −8 S cm −1 . Thirdly, shift emission spectrum mixed halide 3− x...
Since interface charge changes band bending and thus influences photocurrent, its dynamics governs the current–voltage hysteresis.
Abstract Formamidinium‐cesium triiodide (FA x Cs 1‐x PbI 3 ) perovskite exhibits excellent phase stability, making it the most promising candidate for commercial solar cell (PSC) applications, particularly those with inverted structures present a contribution to field of production. However, this composition often forms small grain sizes and has large number defects 2 residues on its surface, which can damage device performance. In study, post‐surface engineering strategy called...
Given that it is closely related to perovskite crystallization and interfacial trap densities, buried engineering crucial for creating effective stable solar cells. Compared with the in-depth studies on defect at top interface, exploring of side film relatively complicated scanty owing non-exposed feature. Herein, degradation process probed from films continuous illumination its effects morphology photoelectronic characteristics a facile lift-off method. Additionally, buffer layer Piperazine...
A straightforward synthesis of triphenylene-perylene-triphenylene triad structures has been achieved by using versatile triphenylene intermediates bearing a single oxyalkyl amine side chain. Among these, PBITP(10) showed stable columnar mesophase implying favorably matched core-core separations in the structure. Importantly, can be used as vehicle for doping matrices with functional but incompatible perylene units and mixture hexahexyloxytriphenylene matrix doped 0.1% is homogeneous liquid...
Organometallic halide perovskites have recently drawn considerable attention for applications in light emission diodes (LEDs). However, the small exciton binding energy of CH3NH3PbI3 perovskite has concerns large dissociation and low radiative recombination on its use near-infrared LEDs (NIR-LEDs). Herein, we propose demonstrate that introduction poly(2-ethyl-2-oxazoline) (PEtOz) into can simultaneously improve rate decay improving LED performances. Additionally, our approach results smooth...
In this study, the theoretical efficiencies of tandem solar cells (TSCs) are investigated through an analysis various configurations and bandgap combinations. results, it is indicated that two‐junction two‐terminal (2J 2T) can achieve a maximum efficiency 45% with subcells exhibiting bandgaps 1.60 0.95 eV, while 2J 4T reach 45.45% featuring 1.71 0.94 eV. Additionally, 3J 2T TSCs maintain peak 51.19%, utilizing 1.91, 1.38, 6T exhibit at 51.49% showcasing 2.07, 1.39, 0.93 roadmap offered for...
The instability of 3D perovskite and the low power conversion efficiency (PCE) 2D limit development solar cells (PSCs). Using to passivate thin films by heterojunction engineering has become an effective strategy develop stable efficient PSCs. Therefore, it is important find suitable passivation materials. Herein, a 2D/3D formed in situ introducing long‐chain alkyl phenylbutylammonium (PBA + ) cation. property n = 2, which passivates surface defects perovskite, resulting enhanced...
Praseodymium(dibenzoylmethanato) 3 (bathophenanthroline ) [Pr(DBM)3bath] was employed as an emitting and electron transport layer, N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1, 1′-biphenyl-4,4′-diamine (TPD) a hole layer in organic electroluminescent (EL) devices. Bilayer device TPD/Pr(DBM)3bath trilayer devices TPD/TPD:Pr(DBM)3bath/Pr(DBM)3bath with different ratio of TPD to the Pr-complex were fabricated. Emission bands at 608 nm (1D2→3H6), 890 (1D2→3F2), 1015 (1D2→3F3), 1065 (1D2→3F4) 1550...
The grain boundaries of perovskite polycrystalline are regarded as a defect region that not only provides carrier recombination sites but also introduces device degradation pathways. Efforts to enlarging the size film and reducing its boundary crucial for highly efficient stable solar cells (PSCs). Some effective methods facilitate growth postdeposition thermal annealing solvent vapor annealing. However, detailed understanding mechanisms in films is lacking. In this study, were prepared by...
Indium-tin-oxide (ITO) anode treated by different gas plasma or UV ozone has been used for photovoltaic (PV) cells with structure of ITO/copper phthalocyanine (CuPc)/C60/bathocuproine/Al. Both surface energy and work function the ITO substrates were affected these treatments. However, main performance parameters PV cells, including short circuit current, open voltage, power conversion efficiency, fill factor, almost unaffected. On other hand, series shunt resistances derived from numerical...