A5067180493- Perovskite Materials and Applications
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Thin-Film Transistor Technologies
- Ultrasound and Hyperthermia Applications
- Thermal Radiation and Cooling Technologies
- Radiative Heat Transfer Studies
- Solid-state spectroscopy and crystallography
- Photoacoustic and Ultrasonic Imaging
- Advanced battery technologies research
- solar cell performance optimization
- Numerical methods in inverse problems
- Organic Light-Emitting Diodes Research
- Atmospheric aerosols and clouds
- Hemodynamic Monitoring and Therapy
- Neuroscience and Neural Engineering
- EEG and Brain-Computer Interfaces
- Model Reduction and Neural Networks
- Magnetic Field Sensors Techniques
- Technostress in Professional Settings
- Private Equity and Venture Capital
- Fullerene Chemistry and Applications
- Ultrasound and Cavitation Phenomena
Nanjing University
2022-2024
Suzhou University of Science and Technology
2024
Hong Kong University of Science and Technology
2015-2023
University of Hong Kong
2015-2023
Zhengzhou University
2022
Applied Physical Sciences (United States)
2019-2022
University of North Carolina at Chapel Hill
2019-2022
Communities In Schools of Orange County
2021
HKUST Shenzhen Research Institute
2015-2019
Columbia University
2015-2017
Stability through oxysalts The stability of organic-inorganic perovskite solar cells is limited by degradation from oxygen and water. Yang et al. show that in situ reaction perovskites with sulfate or phosphate ions can create thin, strongly bonded lead oxysalt layers protect defect sites. This layer also boosts charge carrier lifetimes to a power conversion efficiency more than 20%. Encapsulated devices maintained about 97% this simulated irradiation for nearly 2 months at realistic...
The interfaces of perovskite solar cells (PSCs) are important in determining their efficiency and stability, but the morphology stability imbedded perovskite-substrate have received less attention than top interfaces. We found that dimethyl sulfoxide (DMSO), which is a liquid additive broadly applied to enhance film morphology, was trapped during formation led voids at accelerated degradation under illumination. Partial replacement DMSO with solid-state carbohydrazide reduces interfacial...
To achieve efficient non-fullerene organic solar cells, it is important to reduce the voltage loss from optical bandgap open-circuit of cell. Here we report a highly cell with high 1.08 V and small 0.55 V. The performance was enabled by novel wide-bandgap (2.05 eV) donor polymer paired narrow-bandgap (1.63 small-molecular acceptor (SMA). Our morphology characterizations show that both SMA can maintain crystallinity in blend film, resulting crystalline domains. As result, our cells realize an...
Ravishankar et al. claimed the drive-level capacitance profiling (DLCP) method cannot resolve trap density along depth direction in perovskites with given thickness, and explained measured charges to be a consequence of geometrical diffusion capacitance. We point out that densities DLCP are derived from differential at different frequencies, thus background caused by geometry has been subtracted. Even for non-differential doping analysis DLCP, contribution is shown negligible excluded....
One-step deposition of perovskite films follows the downward crystallization from intermediate phases during thermal annealing.
A 7.3% efficiency non–fullerene polymer solar cell is realized by combining a large-bandgap PffT2-FTAZ-2DT with small-bandgap acceptor IEIC. The complementary absorption of donor and small-molecule responsible for the high-performance solar-cell device. This work provides important guidance to improve performance non-fullerene cells. As service our authors readers, this journal supporting information supplied authors. Such materials are peer reviewed may be re-organized online delivery, but...
Abstract Perovskite materials are good candidates for flexible photovoltaic applications due to their strong absorption and low‐temperature processing, but efficient perovskite modules have not yet been realized. Here, a record efficiency solar module is demonstrated by blade coating high‐quality films on Corning Willow Glass using additive engineering. Ammonium chloride (NH 4 Cl) added into the precursor solution retard nucleation which prevents voids formation at interface of glass. The...
An additive can remove detrimental iodine in degraded precursors, which enhances the performance and yield of perovskite devices.
Here we demonstrate efficient all-polymer solar cells (all-PSCs) based on a polymer acceptor named PFBDT-IDTIC. By combining PFBDT-IDTIC with fluorinated donor (PM6), high power conversion efficiency of 10.3% can be achieved, which is the highest value reported to date for single-junction all-PSCs. This performance attributed its good absorption property (absorption coefficient: 2.74 × 105 cm–1) and electron mobility It also found that choice has major impacts cell. replacing PBDB-T...
State-of-art Y-series polymer acceptors are typically based on a mono-thiophene linker, which can cause some twisted molecular conformations and thus limit the performance of all-polymer solar cells (all-PSCs). Here, high-performance acceptor vinylene linkers is reported, leads to surprising changes in polymers' conformations, optoelectronic properties, enhanced photovoltaic performance. It found that thiophene or bithiophene (PY-T-γ PY-2T-γ) display significant twisting between end-groups...
Abstract Polymerization sites of small molecule acceptors (SMAs) play vital roles in determining device performance all‐polymer solar cells (all‐PSCs). Different from our recent work about fluoro‐ and bromo‐ co‐modified end group IC‐FBr (a mixture IC‐FBr1 IC‐FBr2), this paper, we synthesized purified two regiospecific substituted groups (IC‐FBr‐ o & IC‐FBr‐ m ), which were then employed to construct regio‐regular polymer named PYF‐T‐ , respectively . In comparison with its isomeric...
Abstract State‐of‐the‐art organic solar cells (OSCs) typically suffer from large voltage loss ( V ) compared to their inorganic and perovskite counterparts. There are some successful attempts reduce the by decreasing energy offsets between donor acceptor materials, OSC community has demonstrated efficient systems with either small highest occupied molecular orbital (HOMO) offset or negligible lowest unoccupied (LUMO) donors acceptors. However, OSCs based on a donor/acceptor system both HOMO...
Abstract A low defect density in metal halide perovskite single crystals is critical to achieve high performance optoelectronic devices. Here we show the reduction of grown by a ligand-assisted solution process with 3‐(decyldimethylammonio)‐propane‐sulfonate inner salt (DPSI) as an additive. DPSI ligands anchoring lead ions on crystal surfaces not only suppress nucleation solution, but also regulate addition proper growing surface, which greatly enhances quality. The CH 3 NH PbI better...
Abstract Perovskite photovoltaics are gaining increasing common ground to partner with or compete silicon reduce cost of solar energy. However, a cost-effective waste management for toxic lead (Pb), which might determine the fate this technology, has not been developed yet. Here, we report an end-of-life material perovskite modules recycle and valuable transparent conductors protect environment create dramatic economic benefits from recycled materials. Lead is separated decommissioned by...
Abstract Fullerene acceptors typically possess excellent electron-transporting properties and can work as guest components in ternary organic solar cells to enhance the charge extraction efficiencies. However, conventional fullerene small molecules suffer from undesirable segregation dimerization, thus limiting their applications cells. Herein we report use of a poly(fullerene- alt -xylene) acceptor (PFBO-C12) component enables significant efficiency increase 16.9% for binary 18.0%...
Perovskite (PVSK) photovoltaic (PV) devices are undergoing rapid development and have reached a certified power conversion efficiency (PCE) of 26.1% at the cell level. Tremendous efforts in material device engineering also increased moisture, heat, light-related stability. Moreover, solution-process nature makes fabrication process perovskite feasible compatible with some mature high-volume manufacturing techniques. All these features render solar modules (PSMs) suitable for terawatt-scale...
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...
Abstract Tuning the properties of non‐fullerene acceptors (NFAs) through halogenation, including fluorination and chlorination, represents one most promising strategies to boost performance organic solar cells (OSCs). However, it remains unclear how F Cl choice influences molecular packing between small‐molecule polymeric acceptors. Here, a series with different amounts types halogenation is synthesized, effects chlorination are investigated. It found that chlorinated lead longer exciton...