A5013304509- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Physics of Superconductivity and Magnetism
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Magnetic properties of thin films
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- High-pressure geophysics and materials
- Flame retardant materials and properties
- Superconducting Materials and Applications
- Superconductivity in MgB2 and Alloys
- ZnO doping and properties
- Electrospun Nanofibers in Biomedical Applications
- Electronic and Structural Properties of Oxides
- Iron-based superconductors research
- Theoretical and Computational Physics
- Advanced Cellulose Research Studies
- Advanced Chemical Physics Studies
- Synthesis and properties of polymers
Hong Kong Polytechnic University
2018-2025
Applied Physical Sciences (United States)
2020-2024
University of North Carolina at Chapel Hill
2020-2024
Wuhan University
2015-2022
Institute of Physics
2004-2022
Chinese Academy of Sciences
2021-2022
Argonne National Laboratory
2016-2022
University of Chinese Academy of Sciences
2022
Huazhong University of Science and Technology
2021
Sichuan University
2021
Lead halide perovskite solar cells with the high efficiencies typically use high-temperature processed TiO2 as electron transporting layers (ETLs). Here, we demonstrate that low-temperature solution-processed nanocrystalline SnO2 can be an excellent alternative ETL material for efficient cells. Our best-performing planar cell using such a has achieved average efficiency of 16.02%, obtained from measured both reverse and forward voltage scans. The outstanding performance ETLs is attributed to...
Abstract SnO 2 has been well investigated in many successful state‐of‐the‐art perovskite solar cells (PSCs) due to its favorable attributes such as high mobility, wide bandgap, and deep conduction band valence band. Several independent studies show the performances of PSCs with are higher than that TiO , especially device stability. In 2015, first planar were reported a power conversion efficiency over 17% using low temperature sol‐derived nanocrystal electron transport layer (ETL). Since...
Thin-film photovoltaics based on organic–inorganic hybrid perovskite light absorbers have recently emerged as a promising low-cost solar energy harvesting technology.
Efficient lead halide perovskite solar cells use hole-blocking layers to help collection of photogenerated electrons and achieve high open-circuit voltages. Here, we report the realization efficient grown directly on fluorine-doped tin oxide-coated substrates without using any layers. With ultraviolet–ozone treatment substrates, a planar Au/hole-transporting material/CH3NH3PbI3-xClx/substrate cell processed by solution method has achieved power conversion efficiency over 14% an voltage 1.06...
APTES-SAM as an efficient interfacial layer in planar perovskite solar cells, optimizing the interface and enhancing performance.
Abstract The carrier concentration of the electron‐selective layer (ESL) and hole‐selective can significantly affect performance organic–inorganic lead halide perovskite solar cells (PSCs). Herein, a facile yet effective two‐step method, i.e., room‐temperature colloidal synthesis low‐temperature removal additive (thiourea), to control SnO 2 quantum dot (QD) ESLs achieve high‐performance PSCs is developed. By optimizing electron density QD ESLs, champion stabilized power output 20.32% for...
High-quality pinhole-free perovskite film with optimal crystalline morphology is critical for achieving high-efficiency and high-stability solar cells (PSCs). In this study, a p-type π-conjugated polymer poly[(2,6-(4,8-bis(5-(2-ethylhexyl) thiophen-2-yl)-benzo[1,2-b:4,5-b'] dithiophene))-alt-(5,5-(1',3'-di-2-thienyl-5',7'-bis(2-ethylhexyl) benzo[1',2'-c:4',5'-c'] dithiophene-4,8-dione))] (PBDB-T) introduced into chlorobenzene to form facile effective template-agent during the anti-solvent...
Despite the rapid increase of efficiency, perovskite solar cells (PSCs) still face some challenges, one which is current-voltage hysteresis. Herein, it reported that yttrium-doped tin dioxide (Y-SnO2 ) electron selective layer (ESL) synthesized by an in situ hydrothermal growth process at 95 °C can significantly reduce hysteresis and improve performance PSCs. Comparison studies reveal two main effects Y doping SnO2 ESLs: (1) promotes formation well-aligned more homogeneous distribution...
Reducing the energy loss and retarding carrier recombination at interface are crucial to improve performance of perovskite solar cell (PSCs). However, little is known about mechanism anode SnO 2 electron transfer layer (ETL). In this work, an ultrathin wide bandgap dielectric MgO nanolayer incorporated between :F (FTO) electrode ETL planar PSCs, realizing enhanced transporting hole blocking properties. With use modifier, a power conversion efficiency 18.23% demonstrated, 11% increment...
Mg doping improves interfacial contact and endows low hysteresis high temperature processed SnO<sub>2</sub>-based PSCs with a steady-state PCE of 14.55%.
Abstract Planar perovskite solar cells (PSCs) based on low‐temperature‐processed (LTP) SnO 2 have demonstrated excellent photovoltaic properties duo to the high electron mobility, wide bandgap, and suitable band energy alignment of LTP . However, planar PSCs or mesoporous (mp) high‐temperature‐processed (HTP) show much degraded performance. Here, a new strategy with fully HTP Mg‐doped quantum dot as blocking layer (bl) quite thin nanoparticle mp are developed. The performances both has been...
Mixed perovskites have achieved substantial successes in boosting solar cell efficiency, but the complicated perovskite crystal formation pathway remains mysterious. Here, detailed crystallization process of mixed (FA0.83 MA0.17 Pb(I0.83 Br0.17 )3 ) during spin-coating is revealed by situ grazing-incidence wide-angle X-ray scattering measurements, and three phase-formation stages are identified: I) precursor solution; II) hexagonal δ-phase (2H); III) complex phases including polytypes (4H,...
Narrow-bandgap (NBG) tin (Sn)-lead (Pb) perovskites generally have a high density of unintentional p-type self-doping, which reduces the charge-carrier lifetimes, diffusion lengths, and device efficiencies. Here, p-n homojunction across Sn-Pb perovskite is demonstrated, results from gradient doping by barium ions (Ba2+ ). It reported that 0.1 mol% Ba2+ can effectively compensate p-doping or even turns it to n-type without changing its bandgap. cations are found stay at interstitial sites...
The light-emitting diodes (LEDs) used in indoor testing of perovskite solar cells do not expose them to the levels ultraviolet (UV) radiation that they would receive actual outdoor use. We report degradation mechanisms p-i-n-structured under unfiltered sunlight and with LEDs. Weak chemical bonding between perovskites polymer hole-transporting materials (HTMs) transparent conducting oxides (TCOs) dominate accelerated A-site cation migration, rather than direct HTMs. An aromatic phosphonic...
Abstract Interstitial iodides are the most critical type of defects in perovskite solar cells that limits efficiency and stability. They can be generated during solution, film, device processing, further accelerating degradation. Herein, we find introducing a small amount zinc salt- trifluoromethane sulfonate (Zn(OOSCF 3 ) 2 solution control iodide resultant perovskites ink films. CF SOO ̶ vigorously suppresses molecular iodine formation by reducing it to iodide. At same time, cations...
Perovskite solar cells (PSCs) may offer huge potential in photovoltaic conversion, yet their practical applications face one major obstacle: low stability, or quick degradation of initial efficiencies. Here, a new design scheme is presented to enhance the PSC stability by using low‐temperature hydrothermally grown hierarchical nano‐SnO 2 electron transport layers (ETLs). The ETL contains thin compact SnO layer underneath mesoporous nanosheets. plays multiple roles enhancing photon...