A5077132459- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Organic Electronics and Photovoltaics
- Silicon and Solar Cell Technologies
- Thin-Film Transistor Technologies
- Semiconductor materials and interfaces
- Solid-state spectroscopy and crystallography
- Organic Light-Emitting Diodes Research
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Electrocatalysts for Energy Conversion
- GaN-based semiconductor devices and materials
- Luminescence Properties of Advanced Materials
- Silicon Nanostructures and Photoluminescence
- Luminescence and Fluorescent Materials
- Advanced battery technologies research
- Ga2O3 and related materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor materials and devices
- Photocathodes and Microchannel Plates
- Acoustic Wave Resonator Technologies
Australian National University
2016-2024
Jilin Normal University
2023-2024
Canberra (United Kingdom)
2016-2018
Tsinghua University
2010-2018
State Key Laboratory of New Ceramics and Fine Processing
2010-2018
Nanyang Technological University
2015-2016
IP Australia
2016
University of Chinese Academy of Sciences
2012
Changchun Institute of Optics, Fine Mechanics and Physics
2012
Chinese Academy of Sciences
2012
The abundant reserve and low cost of sodium have provoked tremendous evolution Na-ion batteries (SIBs) in the past few years, but their performances are still limited by either specific capacity or rate capability. Attempts to pursue high ability with maintained a single electrode remains even more challenging. Here, an elaborate self-branched 2D SnS2 (B-SnS2) nanoarray is designed facile hot bath method for Na storage. This interesting exhibits areal reversible ca. 3.7 mAh cm–2 (900 g–1)...
Rubidium (Rb) is explored as an alternative cation to use in a novel multication method with the formamidinium/methylammonium/cesium (Cs) system obtain 1.73 eV bangap perovskite cells negligible hysteresis and steady state efficiency high 17.4%. The study shows beneficial effect of Rb improving crystallinity suppressing defect migration material. light stability examined under continuous illumination 12 h improved upon addition Cs Rb. After several cycles light–dark, cell retains 90% its...
Abstract The performance of state‐of‐the‐art perovskite solar cells is currently limited by defect‐induced recombination at interfaces between the and electron hole transport layers. These defects, most likely undercoordinated Pb halide ions, must either be removed or passivated if cell efficiencies are to approach their theoretical limit. In this work, a universal double‐side polymer passivation introduced using ultrathin poly(methyl methacrylate) (PMMA) films. Very high‐efficiency (≈20.8%)...
Reducing interface recombination boosts the <italic>V</italic><sub>oc</sub> for perovskite solar cells.
Polymer passivation layers can improve the open-circuit voltage of perovskite solar cells when inserted at perovskite-charge transport layer interfaces. Unfortunately, many such are poor conductors, leading to a trade-off between quality (voltage) and series resistance (fill factor, FF). Here, we introduce nanopatterned electron that overcomes this by modifying spatial distribution form nanoscale localized charge pathways through an otherwise passivated interface, thereby providing both...
A perovskite/CIGS tandem configuration is an attractive and viable approach to achieve ultra-high efficiency cost-effective all-thin-film solar cell.
Although low-temperature, solution-processed zinc oxide (ZnO) has been widely adopted as the electron collection layer (ECL) in perovskite solar cells (PSCs) because of its simple synthesis and excellent electrical properties such high charge mobility, thermal stability films deposited atop ZnO remains a major issue. Herein, we addressed this problem by employing aluminum-doped (AZO) ECL obtained extraordinarily thermally stable layers. The improvement was ascribed to diminish Lewis...
An innovative design for a monolithic perovskite/silicon tandem solar cell, featuring mesoscopic perovskite top subcell and high-temperature tolerant homojunction c-Si bottom subcell.
In addition to a good perovskite light absorbing layer, the hole and electron transport layers play crucial role in achieving high‐efficiency solar cells. Here, simple, one‐step, solution‐based method is introduced for fabricating high quality indium‐doped titanium oxide layers. It shown that indium‐doping improves both conductivity of layer band alignment at ETL/perovskite interface compared pure TiO 2 , boosting fill‐factor voltage Using optimized layers, steady‐state efficiency 17.9% CH 3...
A variety of unexpected characterization results exhibited by perovskite solar cells are linked to the presence mobile ions in active layer, as demonstrated detailed numerical device models.
Abstract Defect‐mediated carrier recombination at the interfaces between perovskite and neighboring charge transport layers limits efficiency of most state‐of‐the‐art solar cells. Passivation interfacial defects is thus essential for attaining cell efficiencies close to theoretical limit. In this work, a novel double‐sided passivation 3D films demonstrated with thin surface bulky organic cation–based halide compound forming 2D layered perovskite. Highly efficient (22.77%) mixed‐dimensional...
Increasing the power conversion efficiency of silicon (Si) photovoltaics is a key enabler for continued reductions in cost solar electricity. Here, we describe two-terminal perovskite/Si tandem design that increases Si cell's output simplest possible manner: by placing perovskite cell directly on top bottom cell. The advantageous omission conventional interlayer eliminates both optical losses and processing steps enabled low contact resistivity attainable between n-type TiO2 Si, established...
Perovskite material with a bandgap of 1.7–1.8 eV is highly desirable for the top cell in tandem configuration lower bottom cell, such as silicon cell. This can be achieved by alloying iodide and bromide anions, but light-induced phase-segregation phenomena are often observed perovskite films this kind, implications solar efficiency. Here, we investigate phase segregation inside quadruple-cation complete structure find that magnitude phenomenon dependent on operating condition Under...
Abstract In this study, a facile and effective approach to synthesize high‐quality perovskite‐quantum dots (QDs) hybrid film is demonstrated, which dramatically improves the photovoltaic performance of perovskite solar cell (PSC). Adding PbS QDs into CH 3 NH PbI (MAPbI ) precursor form QD‐in‐perovskite structure found be beneficial for crystallization perovskite, revealed by enlarged grain size, reduced fragmentized grains, enhanced characteristic peak intensity, large percentage (220) plane...
Abstract The open‐circuit voltage ( V OC ) and fill factor are key performance parameters of solar cells, understanding the underlying mechanisms that limit these in real devices is critical to their optimization. Device modeling combined with luminescence cell current–voltage I – measurements show carrier transport limitations within can significantly reduce around maximum power point as well as, under certain conditions, at . An important consequence terminal cannot be assumed a priori...
Abstract Mixed‐dimensional perovskite solar cells combining 3D and 2D perovskites have recently attracted wide interest owing to improved device efficiency stability. Yet, it remains unclear which method of works best obtain a mixed‐dimensional system with the advantages both types. To address this, different strategies are investigated, namely surface coating bulk incorporation. It is found that through aliphatic alkylammonium bulky cations, Ruddlesden–Popper “quasi‐2D” phase formed on...
Abstract The article commences with a review focusing on three critical aspects of the perovskite/Si tandem technology: evolution efficiencies to date, comparisons Si subcell choices, and interconnection design strategies. Building this review, clear route is provided for minimizing optical losses aided by simulations recently reported high‐efficiency system, optimizations which result in current densities ≈20 mAcm −2 front‐side texture. primary focus electrical modeling Si‐subcell, order...
We investigate the properties of an inexpensive hole-transporting material (HTM), copper phthalocyanine (CuPc), deposited by a solution-processing method in perovskite solar cells (PSCs). Cracks are found to be abundant on as-deposited CuPc films, which lead serious shunts and interface recombination. Surprisingly, recombination significantly reduced cell performance is greatly improved after heat treatment at 85 °C. find that enhancement due heat-induced migration Au particles away from...
A tandem configuration of perovskite and silicon solar cells is a promising way to achieve high-efficiency energy conversion at low cost. Four-terminal tandems, in which each cell connected independently, avoid the need for current matching between top bottom cells, giving greater design flexibility. In four-terminal tandem, requires two transparent contacts. Through detailed analysis electrical optical power losses, we identify optimum contact parameters outline directions development...
Abstract Realizing solar‐to‐hydrogen (STH) efficiencies close to 20% using low‐cost semiconductors remains a major step toward accomplishing the practical viability of photoelectrochemical (PEC) hydrogen generation technologies. Dual‐absorber tandem cells combining inexpensive are promising strategy achieve high STH at reasonable cost. Here, perovskite photovoltaic biased silicon (Si) photoelectrode is demonstrated for highly efficient stand‐alone solar water splitting. A p + nn ‐Si/Ti/Pt...