A5023215537- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Organic Electronics and Photovoltaics
- Silicon Nanostructures and Photoluminescence
- Semiconductor materials and interfaces
- Copper-based nanomaterials and applications
- Organic Light-Emitting Diodes Research
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- 2D Materials and Applications
- GaN-based semiconductor devices and materials
- ZnO doping and properties
- Optical properties and cooling technologies in crystalline materials
- Ga2O3 and related materials
- solar cell performance optimization
- Ferroelectric and Negative Capacitance Devices
- Ferroelectric and Piezoelectric Materials
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Photovoltaic Systems and Sustainability
ARC Centre of Excellence in Advanced Molecular Imaging
2016-2025
UNSW Sydney
2016-2025
University of Surrey
2021-2025
Kyung Hee University
2025
Korea Institute of Energy Research
2023
Australian Centre for Advanced Photovoltaics
2016-2023
University of Electro-Communications
2018
The University of Sydney
2016
Monash University
2016
Dongguk University
2001
The past 2 years have seen the uniquely rapid emergence of a new class solar cell based on mixed organic-inorganic halide perovskite. Grain boundaries are present in polycrystalline thin film cell, and they play an important role that could be benign or detrimental to solar-cell performance. Here we efficient charge separation collection at grain measured by KPFM c-AFM CH3NH3PbI3 CH3NH3PbI3/TiO2/FTO/glass heterojunction structure. We observe presence potential barrier along under dark...
Beneficial effects are demonstrated by PbI2 incorporated into perovskite materials as a light absorber in solar cells. The distributed the layers leads to reduced hysteresis and ionic migration, enables fabrication of remarkably improved cells with certified power conversion efficiency 19.75% under air-mass 1.5 global (AM 1.5G) illumination 100 mW cm−2 intensity. As service our authors readers, this journal provides supporting information supplied authors. Such peer reviewed may be...
The critical role of grain boundaries for (CH(NH2)2PbI3)0.85(CH3NH3PbBr3)0.15 perovskite solar cells studied by Kelvin probe force microscopy under bias voltage and illumination is reported. Ion migration enhanced at the boundaries. Under illumination, light-induced potential causes ion leading to a rearranged distribution. Such distribution favors photogenerated charge-carrier collection As service our authors readers, this journal provides supporting information supplied authors. materials...
In this work, we report the benefits of incorporating phenethylammonium cation (PEA+) into (HC(NH2)2PbI3)0.85(CH3NH3PbBr3)0.15 perovskite for first time. After adding small amounts PEA (<10%), film morphology is changed but, most importantly, grain boundaries are passivated. This supported by Kelvin Probe Force Microscopy (KPFM). The passivation results in increase photoluminescence intensity and carrier lifetimes test structures open-circuit voltages (VOC) devices as long addition PEA+...
Abstract The sensitivity of organic–inorganic perovskites to environmental factors remains a major barrier for these materials become commercially viable photovoltaic applications. In this work, the degradation formamidinium lead iodide (FAPbI 3 ) perovskite in moist environment is systematically investigated. It shown that level relative humidity (RH) important onset processes. Below 30% RH, black phase FAPbI shows excellent stability over 90 d. Once RH reaches 50%, occurs rapidly. Results...
Abstract Layered low‐dimensional perovskite structures employing bulky organic ammonium cations have shown significant improvement on stability but poorer performance generally compared to their 3D counterparts. Here, a mixed passivation (MP) treatment is reported that uses mixture of iodide ( iso ‐butylammonium iodide, i BAI) and formammidinium (FAI), enhancing both power conversion efficiency stability. Through combination inactivation the interfacial trap sites, characterized by...
We apply gas quenching to fabricate rubidium (Rb) incorporated perovskite films for high-efficiency solar cells achieving 20% power conversion efficiency on a 65 mm2 device. Both double-cation and triple-cation perovskites containing combination of methylammonium, formamidinium, cesium, Rb have been investigated. It is found that not fully embedded in the lattice. However, small incorporation leads an improvement photovoltaic performance corresponding devices both systems.
In this work, an inorganic halide perovskite solar cell using a spray-assisted solution-processed CsPbIBr2 film is demonstrated. The process allows sequential solution processing of the film, overcoming solubility problem bromide ion in precursor that would otherwise occur single-step process. spraying CsI air demonstrated to be successful, and annealing also successful producing with optical band gap 2.05 eV thermally stable at 300 °C. effects substrate temperature during on quality device...
Abstract Planar perovskite solar cells obtained by low‐temperature solution processing are of great promise, given a high compatibility with flexible substrates and perovskite‐based tandem devices, whilst benefitting from relatively simple manufacturing methods. However, ionic defects at surfaces usually cause detrimental carrier recombination, which links to one dominant losses in device performance, slow transient responses, notorious hysteresis. Here, it is shown that several different...
For the fabrication of perovskite solar cells (PSCs) using a solution process, it is essential to understand characteristics precursor achieve high performance and reproducibility. The colloids (iodoplumbates) in precursors under various conditions were investigated by UV-visible absorption, dynamic light scattering, photoluminescence, total internal reflection fluorescence microscopy techniques. Their local structure was examined situ X-ray absorption fine studies. Perovskite thin films on...
Abstract Ambient energy harvesting has great potential to contribute sustainable development and address growing environmental challenges. Converting waste from energy-intensive processes systems (e.g. combustion engines furnaces) is crucial reducing their impact achieving net-zero emissions. Compact harvesters will also be key powering the exponentially smart devices ecosystem that part of Internet Things, thus enabling futuristic applications can improve our quality life homes, cities,...
For the first time, we report large-area (16 cm2) independently certified efficient single perovskite solar cells (PSCs) by overcoming two challenges associated with cells. The challenge of realizing a homogeneous and densely packed film over large area is overcome using an antisolvent spraying process. second removing series resistance limitation transparent conductor incorporating metal grid designed semidistributed diode model. A 16 cm2 device at cell level rather than module demonstrated...
Cd-Free CZTS solar cell with above 10% efficiency was achieved by an Al<sub>2</sub>O<sub>3</sub>passivation layer prepared ALD.
Abstract Organic–inorganic metal halide perovskites have gained considerable attention for next-generation photovoltaic cells due to rapid improvement in power conversion efficiencies. However, fundamental understanding of underlying mechanisms related light- and bias-induced effects at the nanoscale is still required. Here, structural variations induced by light bias are systematically investigated using scanning probe microscopy techniques. We show that periodically striped ferroelastic...
NiOx is as a promising hole transporting layer (HTL) for perovskite solar cells (PSCs) due to its good stability, large bandgap, and deep valence band. The use of HTL "inverted" PSC part monolithic silicon/perovskite tandem cell also suitable when the processing temperature suitably low. Solution-processed at low PSCs remains be improved relatively short-circuit current density (Jsc) fill factor (FF) reported devices. In this work, Ag-doping solution-processed film 300 °C inverted planar...
Halide perovskites such as methylammonium lead iodide (MAPbI3) currently attract considerable attention because of their excellent optoelectronic properties and performance in solar cell devices. Despite tremendous research efforts to elucidate fundamental properties, ion migration with the presence ionic defects is still not fully understood. Here, various types for specific (100) (112) lattice facets single-crystal MAPbI3 have been investigated systematically. Our measurements reveal...
Abstract Long‐chain organic halide salts are widely used in perovskite‐based optoelectronic devices for surface passivation owing to their capability interact with the defects of perovskites. Here, aluminum oxide (AlO x ) is introduced via atomic layer deposition onto octylammonium iodide (OAI) exploit benefits without generating undesired defects. The incorporating AlO on OAI‐treated perovskite (OAI/AlO show enhancement both device performance and photo‐stability compared those only...
The development of perovskite solar cells (PSCs) with low recombination losses at processing temperatures is an area growing research interest as it enables compatibility roll‐to‐roll on flexible substrates well tandem cells. inverted or p–i–n device architecture has emerged the most promising PSC configuration due to possibility using low‐temperature processable organic hole‐transport layers and more recently, self‐assembled monolayers such [4‐(3,6‐dimethyl‐9 H...
Abstract Photovoltaics (PVs) are a critical technology for curbing growing levels of anthropogenic greenhouse gas emissions, and meeting increases in future demand low-carbon electricity. In order to fulfill ambitions net-zero carbon dioxide equivalent (CO 2 eq) emissions worldwide, the global cumulative capacity solar PVs must increase by an magnitude from 0.9 TW p 2021 8.5 2050 according International Renewable Energy Agency, which is considered be highly conservative estimate. 2020, Henry...
Perovskite solar cells (PSCs) have emerged as a promising technology for converting energy into electricity, owing to their high efficiency and multifunctionality. In recent years, the focus of research...