A5013971169- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
École Polytechnique Fédérale de Lausanne
2023-2025
North China Electric Power University
2023-2024
Fudan University
2023-2024
The defects located at the interfaces and grain boundaries (GBs) of perovskite films are detrimental to photovoltaic performance stability solar cells. Manipulating crystallization process tailoring with molecular passivators main effective strategies mitigate loss instability. Herein, a new strategy is reported manipulate FAPbI3 -rich by incorporating small amount alkali-functionalized polymers into antisolvent solution. synergic effects alkali cations poly(acrylic acid) anion effectively...
Manipulation of interfacial defects and carrier extraction or transport are crucial for improving the operational stability photovoltaic performance perovskite solar cells (PSCs). Here, we propose a technique utilizing bridge molecules to construct viaduct between bulk hole-transporting layers. A molecular configuration combining organic functional groups from each layer was used. The designed not only ensure homogeneous contact promote extraction/transport but also passivate various...
The presence of defects at the interface between perovskite film and carrier transport layer poses significant challenges to performance stability solar cells (PSCs). Addressing this issue, we introduce a dual host-guest (DHG) complexation strategy modulate both bulk interfacial properties FAPbI
All-inorganic CsPbI3 perovskite has emerged as an alternative photovoltaic material owing to its good thermal stability and ideal bandgap for tandem applications. However, solar cells (PSCs) still show poor phase low efficiency. Herein, we propose a new strategy form low-dimensional double (2D-PEA2PbI4 quasi-2D-PEA2(CsPbI3)PbI4) layers on the film by sequential treatment with ammonium benzenesulfonate (ABS) phenylethylammonium iodide (PEAI). After ABS treatment, additional PbI2 was in situ...
Abstract The ongoing global research and development efforts on perovskite solar cells (PSCs) have led the power conversion efficiency to a high record of 26.1%. optimization PSC processing methods, new compositions, introduction passivation strategies are key factors behind meteoric rise in performance. In particular, defect mitigation ion migration via molecular engineering interfaces played critical role enhancing photovoltaic performance operational stability PSCs. interface enabling...
Abstract The mechanical durability and efficiency of all‐inorganic flexible perovskite solar cells (f‐PSCs) still require enhancement for practical applications. In this study, a creative debridement strategy to improve the photovoltaic performance f‐PSCs by pre‐bending film then depositing passivation agent 2‐mercaptopyridine is proposed. process induced generation microcracks in surface, can more effectively penetrate interior through microcracks, thereby further passivating deep surface...
Abstract Efficient manipulation of crystallization and control over defects are crucial for optimizing the performance durability perovskite solar cells (PSCs). In this study, a novel organic multifunctional additive, 2‐(furan‐3‐yl)ethanamine hydrochloride (FFEACl), is introduced which plays pivotal role in regulating process FAPbI 3 . Incorporating FFEACl into precursor solution effectively suppresses formation undesirable non‐perovskite phase impurities while promoting oriented α‐phase...
Abstract The anti‐solvent‐free fabrication of high‐efficiency perovskite solar cells (PSCs) holds immense significance for the transition from laboratory‐scale to large‐scale commercial applications. However, device performance is severely hindered by increased occurrence surface defects resulting lack control over nucleation and crystallization using anti‐solvent methods. In this study, 2‐(naphthalen‐2‐yl)ethylamine hydriodide (NEAI) employed as passivator films without any anti‐solvent....
Cesium bismuth iodide perovskite material offers good stability toward ambient conditions and has potential optoelectronic characteristics. However, wide bandgap, absorber surface roughness, poor coverage with pinholes are among the key impediments to its adoption as a photovoltaic material. Herein, bandgap modification tailoring of morphology have been performed through molar ratio variation antisolvent treatment, whereby type III (toluene) based on Hansen space utilized. XRD Raman...
Abstract FAPbI₃ perovskite solar cells (PSCs) exhibit significant potential for high‐efficiency photovoltaic applications due to their broad light absorption range and exceptional performance. However, practical implementation faces several challenges, such as the formation of non‐photoactive δ‐FAPbI₃ phases, poor thermodynamic stability α‐FAPbI₃ phase, intrinsic defects within films. To address these issues, a multifunctional additive strategy utilizing butylamine acetate (BAAc) was...
Fabrication of air‐stable Pb‐free solar cells using the Ag 2 BiI 5 absorber has recently attracted extensive attention. 4‐tert‐Butylpyridine (tBP) is mainly used as an additive in hole transport layer (HTL). However, tBP can strongly destroy perovskite structure due to formation tBP‐BiI 3 complex. Herein, 2‐pentyl pyridine (2‐py) selected replace Spiro‐OMeTAD precursor solution, which will promote dissolution lithium bis(trifluoromethanesulphonyl)imide salt HTL solution but not crystal more...
Abstract Advancing inverted (p‐i‐n) perovskite solar cells (PSCs) is critical for commercial applications given their compatibility with different bottom tandem photovoltaics, low‐temperature processability (≤100 °C), and promising operational stability. Although PSCs have achieved an efficiency of over 25 % using doped or expensive organic hole transport materials (HTMs), synthesis cost stability still cannot meet the requirements commercialization. Recently, dopant‐free low‐cost...