A5100421092- Perovskite Materials and Applications
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- Human-Automation Interaction and Safety
- Freezing and Crystallization Processes
- Metallurgy and Material Forming
- Ergonomics and Musculoskeletal Disorders
- Advanced battery technologies research
- Advanced Numerical Analysis Techniques
- Thin-Film Transistor Technologies
- Luminescence Properties of Advanced Materials
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Sleep and Work-Related Fatigue
- 2D Materials and Applications
Xiamen University
2021-2025
Uppsala University
2017
Abstract Interface engineering is of paramount importance for optimizing carrier dynamics and stability perovskite solar cells (PSCs), but little attention has been paid to understanding managing the buried interfaces. Here, a molecular bridge strategy developed modify properties interfaces in n–i–p PSCs by introducing multi‐functional additive 2‐Hydroxyethyl trimethylammonium chloride (ChCl) bottom SnO 2 electron transport layer. The ChCl treatment enables bifacial defects passivation...
Abstract Poly[bis(4‐phenyl)(2,4,6‐trimethylphenyl)amine] (PTAA) represents the state‐of‐the‐art hole transport material (HTM) in inverted perovskite solar cells (PSCs). However, unsatisfied surface properties of PTAA and high energy disorder bulk film hinder further enhancement device performance. Herein, a simple small molecule 10‐(4‐(3,6‐dimethoxy‐9H‐carbazol‐9‐yl)phenyl)‐3,7‐bis(4‐vinylphenyl)‐10H‐phenoxazine (MCz‐VPOZ) is strategically developed for situ fabrication polymer conductor...
Perovskites solar cells (PSCs) have been recognized as one of the most prospective photovoltaic technologies for their combined properties simple fabrication process, low material cost, and remarkable power conversion efficiencies over 25%. However, instability poor reliability PSCs remain major obstacles to practical applications. Specifically, light-soaking effect (LSE), which refers fluctuations parameters under light exposure, represents a critical factor limiting accuracy stability...
Abstract Considering the high surface defects of polycrystalline perovskite, chemical passivation is effective in reducing defects‐associated carrier losses. However, challenges remain promoting effects without compromising carrier‐extraction yield at perovskite interfaces. In this work, interlayer molecules functionalized with different side groups are rationally designed to investigate correlation between defect‐passivation strength and interfacial dynamics. It revealed that Cl‐grafted...
Abstract Thermal evaporation (TE) as a scalable and low‐cost technique for fabrication of organic hole transport materials (HTMs) typically produces low photovoltaic performance poor device reproducibility in the application perovskite solar cells (PSCs), there is clear need to understand weaknesses TE. Here, versatile manufacturing technology, solvent‐annealing assisted thermal (SATE), enabling effective modulation film morphology well optoelectronic properties, introduced. The SATE method...
In this paper, the progress made in optimizing structures, composition, crystallization kinetics and device performance of bismuth-based perovskite materials is reviewed to show some opportunities challenges they have encountered.
Abstract Investigation and optimization of the buried interfaces are crucial for further improving efficiency stability perovskite solar cells (PSCs). In this work, a general route to modify electron conductor is strategically developed via introducing well‐designed core@dual–shell structure based on SnO 2 nanoparticles grafted by potassium thiocyanate (KSCN) polyethylene oxide (PEO). This graded bimolecular strategy desired as it efficiently decouples processes defect healing...
Chemical dopants are often required in organic hole transport materials (HTMs) to enhance the film conductivity and power conversion efficiency (PCE) of solar cells. Although additives (LiTFSI + tBP) oxidants (FK209) key HTMs, their hygroscopic volatile nature induce severe morphology change, ion accumulation, as well perovskite corrosion, which significantly hinder PSC stability. Various dopant structures compositions have been developed, but challenges remain fundamentally understanding...
The morphology and structure of buried interfaces play decisive roles in determining the efficiency stability perovskite solar cells (PSCs). However, challenges remain directly visualizing by existing nondestructive techniques. Here, we have developed a facile technique to integrally exfoliate film (up an area 25 cm2) from both flexible rigid glass substrates introducing cross-linkable polymer capping layer on devices. This simple exfoliation approach enables comprehensive characterization...
High efficiency and long-term stability are the prerequisites for commercialization of perovskite solar cells (PSCs). However, inadequate non-uniform doping hole transport layers (HTLs) still limits improvements, while intrinsic instability HTLs caused by ion migration accumulation is difficult to be addressed external encapsulation. Here it shown that addition a conjugated phosphonic acid (CPA) Spiro-OMeTAD benchmark HTL can greatly enhance device stability. Featuring an optimal...
Organic materials have been widely used as the charge transport layers in perovskite solar cells due to their structural versatility and solution processability. However, low surface energy usually causes unsatisfactory thin-film wettability contact with solution, which limits interfacial performance of photovoltaic devices. Although solvent post-treatment could occasionally regulate wetting behavior organic films, mechanism solid–liquid interaction is still unclear. Here, we present...
This review summarizes recent advances in rear counter electrodes for perovskite solar cells, including alternative materials, interfaces and device stability.
Abstract Chemical doping of organic semiconductors enables significant progress in improving their optoelectronic performance. However, the correlation between counter ions and charge‐transport mechanism has not been yet well‐understood. In this study, it is discovered that anion‐dependent degree delocalization (DOD) lithium‐based dopants significantly determines kinetics as well conductivity hole transport layer (HTL), leading to large variation solar cell efficiency device stability....
Defects at the buried interface between of perovskite film and electron transport layer (ETL) are detrimental for both power conversion efficiency (PCE) stability solar cells (PSCs)....
Although hole transport layers (HTLs) based on solution-processed doped Spiro-OMeTAD are extremely popular and effective for their remarkable performance in n-i-p perovskite solar cells (PSCs), scalable application is still being held back by poor chemical stability unsatisfied scalability. Essentially, the volatile components hygroscopic nature of ionic salts often cause morphological deformation that deteriorate both device efficiency stability. Herein, a simple molecular...
Abstract Charge transport layers are critical components in perovskite solar cells (PSCs) for achieving satisfied power conversion efficiencies (PCEs) and device stability. However, these often bring incompatible interfaces complex fabrication, limiting the stability scalability of PSC technology. Here an alternative strategy salt‐based catalyzer (SBC) is proposed to regulate heterogeneous nucleation perovskite, which enables uniform well‐controlled coverage directly onto salt‐treated...
Abstract Perovskite solar cells, as an emergent technology for energy conversion, have attracted much attention in the cell community by demonstrating impressive enhancement power conversion efficiencies. However, high temperature and manually processed TiO 2 underlayer prepared spray pyrolysis significantly limit large‐scale application device reproducibility of perovskite cells. In this study, lowtemperature atomic layer deposition (ALD) is used to prepare a compact Al O 3 The thickness...
Abstract Naphthalene diimides (NDI) are widely serving as the skeleton to construct electron transport materials (ETMs) for optoelectronic devices. However, most of reported NDI‐based ETMs suffer from poor interfaces with perovskite which deteriorates carrier extraction and device stability. Here, a representative design concept editing peripheral groups NDI molecules achieve multifunctional properties is introduced. The resulting molecule 2,7‐bis(2,2,3,3,4,4,4‐heptafluorobutyl)benzo[ lmn...
Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) has been widely applied as a hole transport material in s. Although PEDOT:PSS exhibits the advantages of superior conductivity and low cost, corresponding devices suffer from photovoltaic performance due to unsatisfactory interfacial properties. Here, an acid treatment strategy is developed modify chemical properties by different HX (X = Cl, Br, I) acids. We present evidence effective ion exchange process between show that...
Perovskite solar cells (PSCs) are developing rapidly in recent years, showing remarkable power conversion efficiency (PCE) of 25 %, which is comparable to crystalline silicon cells. However, since perovskite and other functional layers very sensitive the environment with high humidity, illumination, heat, PSCs meet great challenges device stability, significantly limit their industrialization commercialization. Encapsulation has become an effective strategy enhance stability PSCs, various...
A metal-site doping strategy to optimize CsPb 2 Br 5 /CsPbBr 3 perovskite nanocrystals enables effective elimination of vacancies and enhanced luminescence efficiency stability.
Abstract Identification and investigation of light soaking effect (LSE) as well the associated physical mechanisms are crucial for achieving reliable power output high stability solar cells. Here, a profound LSE dependence on doping status organic hole transport materials (HTMs) in perovskite cells is demonstrated. A tenfold efficiency enhancement realized devices based evaporated undoped HTMs caused by LSE. This light‐soaking behavior attributed to increased film conductivity, enhanced...
The CsBi3I10 (CBI) semiconductor as a light absorber emerges promising alternative to lead-based perovskites owing its low toxicity, good stability, and satisfying physical properties. However, CBI exhibits an uncontrollable crystallization process, poor film morphology, high defect density, short carrier lifetime, which lead inferior optoelectronic properties, limiting practical application in solar cell devices. Here, the Sb doping strategy is successfully developed for films by one-step...