Layered 2D perovskites have been extensively investigated by scientists with photovoltaics (PV) expertise due to their good environmental stability. However, a random phase distribution in the perovskite film could affect both performance and stability of devices. To overcome this problem, we propose multifunctional interface engineering GA2MA4Pb5I16 employing guanidinium bromide (GABr) on top it optimize secondary crystallization process. It is found that GABr treatment can facilitate form...

Abstract Longevity is a long‐standing concern for organic–inorganic hybrid perovskite solar cells (PSCs). Recently, the use of low dimensional has been proven to be promising strategy improve stability PSCs. Herein, it demonstrated that 1D perovskitoid based on 2‐diethylaminoethylchloride cations can act as template induce 1D@3D structure, leading smoother surface texture, longer charge‐carrier lifetime, smaller residual tensile strain, and reduced surface‐defect density in film. With this...

Pure FAPbI3 (where FA is formamidinium) based perovskite solar cells (PSCs) have drawn tremendous attention because of their exceptional photovoltaic properties, although long-term stability still a big challenge. Molecular tailoring one the practical approaches to enhancing by passivating film defects; however, deep understanding how molecular configuration affects adjacent layer in PSCs urgently needed. Herein, we report strategy molecularly FAPbI3/SnO2 interface employing three Li salts...

Abstract Pure FAPbI 3 ‐based, with FA being formamidinium, perovskite solar cells (PSCs) have garnered worldwide recognition for their exceptional efficiency. However, the phase stability of is still a big obstacle in this area, because ordinary strategy using MA + , Br − Cs to stabilize α‐FAPbI can cause bandgap change and ion migration. Herein, new introduced improve by self‐assembled bridging layer at buried interface n–i–p cell structure. A series multidentate bisphosphonic acid...

Abstract Although p‐i‐n type inverted perovskite solar cells (PSCs) achieve excellent photoelectric efficiencies, the nonradiative recombination at perovskite/C 60 interface is still key factor affecting overall efficiency of PSCs. Herein, a synergistic passivation strategy (meta‐fluoro‐phenylethylammonium iodide and piperazine iodide) developed to modify in This facilitates situ reconstruction film obtain smooth flat surface. Furthermore, two molecules work synergistically passivate surface...

Abstract Pb‐Sn mixed perovskite has received extensive attention because of its high research value in environmental protection and theoretical prospects. However, the film defects brought on by quick crystallization perovskites facile oxidation Sn 2+ to 4+ are detrimental performance solar cells (PSCs). Here, aiming at interface PSCs, which been less studied, a reducing agent is first introduced top interface. The results show that NaBH 3 CN(SC), B─H can suppress C≡N enhance crystallinity...

Abstract The combination of p‐type NiO x and self‐assembled monolayers (SAMs) has recently emerged as an optimal structure for hole transport layer (HTL) in wide‐bandgap perovskite solar cells (WBG PSCs). However, the unique requirements this cascade HTL system differ significantly from those neat . Specifically, tendency to agglomerate can lead poor film morphology inadequate interfacial contact with SAMs, resulting significant open‐circuit voltage ( V oc ) loss PSCs. Herein, these issues...

Abstract Until now, poly(3,4‐ethylenedioxythiophene):poly(styrensulfonate) (PEDOT:PSS) is widely used in Sn–Pb perovskite solar cells (PSCs) due to its many advantages, including high optical transparency, suitable conductivity, superior wettability, and so on. However, the acidic hydroscopic properties of PSS component, as well incongruous energy level hole transport layer (HTL), may lead unsatisfying interface decreased device performance. Herein, by adding polyethylene glycol...

Abstract Formamidinium (FA)‐based Sn‐Pb perovskite demonstrates superior thermal stability, making it well‐suited for all‐perovskite tandem solar cells. However, the uncontrolled crystallization process remains a significant challenge. In this study, an effective strategy is presented to regulate of FA‐based by incorporating perfluoroanionic surfactant (perfluorohexanesulfonic acid potassium salt, F 13 C 6 SO 3 K) into precursor. The multifunctional sites K, including atoms and − groups,...

Abstract Reducing defect density is of significant importance for enhancing the power conversion efficiency (PCE) and stability perovskite solar cells (PSCs). While most previous outstanding studies have focused on individual layers within device structure. Herein, a three‐in‐one strategy using aminoacetonitrile hydrochloride (AmiHCl) molecule to reduce defects in bulk surface perovskite. The results study found that AmiHCl bottom modification can decrease number buried interface holes,...

Abstract The commonly used hole transport layer (HTL) Poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) still has some shortcomings that will limit the development of Pb–Sn perovskite solar cells (PSCs). In this work, multifunctional ammonium sulfide (AS) is attempted to modify PEDOT:PSS/perovskite interface. AS multiple effects on different functional layers and device as a whole: a) optimize crystallization by formation PbS nucleation sites; b) neutralize acidity...

Novel poly(vinyl alcohols) (PVA) functionalized with pendant thermo- and pH-responsive groups were prepared by carbonyldiimidazole (CDI)-mediated couplings of N1,N1-diethylethane-1,2-diamine (DEEDA) controllable modification degree. Nuclear magnetic response (NMR) IR have verified the successful PVA. The macro- microscopic phase transition behavior obtained PVA-DEEDA-t (t = 10, 30, 70, 90 h) was thoroughly characterized using various techniques, including turbidity measurement, NMR, dynamic...

The black-phase formamidinium lead triiodide (α-FAPbI3) perovskite has turned out to be one of the most efficient light harvesting materials. However, phase stability FAPbI3 is a long-standing issue. Herein, we introduce layer tetrabutylammonium fluoride (TBAF) on SnO2, which would form an in situ TBAPbI3 perovskitoid at SnO2/FAPbI3 interface by interacting with PbI2. results show that this strategy could improve conductivity passivate defects perovskite, α-FAPbI3, and retard nonradiative...

All‐inorganic perovskites have attracted substantial interest due to their outstanding thermal stability. However, the device performance is still inferior typical organic–inorganic counterparts because of unsatisfying phase stability and defects inorganic perovskite films. Herein, a multistrategy optimize CsPbI 2 Br solar cells (PSCs) based on dopant‐free poly(3‐hexylthiophene) (P3HT) by applying thienylmethylamine acetate additive enhance α passivate bulk successfully demonstrated,...

Micro/nanomotors can effectively convert other forms of energy into mechanical energy, which have been widely used in microscopic fields. However, it is still challenging to integrate the micro/nanomotors perform complex tasks for broad applications. Herein, a new mode driving collective motion behaviors integrated liquid by plasmonic heating reported. The micro/nanomotors, constituted gold hollow microcone array (AuHMA), are fabricated via colloidal lithography. Owing excellent...

It is known that the perovskite/hole transport layer (HTL) interface a great limit to achieving high-performance perovskite solar cells (PSCs). Aiming solve this problem, we introduce naphthalene diimide (NDI)-based conjugated polymer bearing 3,4-difluorothiophene (PTzNDI-2FT) at perovskite/HTL interface. We find PTzNDI-2FT interlayer combines multifunctions passivate surface defects on film, improve charge interface, and prevent penetration of moisture organic ion volatilization in film....

MgO-doped LiNbO3 (LN:Mg) is famous for its high resistance to optical damage, but this phenomenon only occurs in visible and infrared regions, photorefraction not decreased enhanced ultraviolet region. Here we investigated a series of ZrO2 co-doped LN:Mg (LN:Mg,Zr) regarding their photorefractive properties. The damage experiment indicated that the against was significantly with increased doping concentration. Moreover, first-principles calculations manifested enhancement LN:Mg,Zr mainly...

Abstract The non‐wetting issue of the self‐assembled monolayer (SAM) layer can complicate subsequent perovskite deposition and impact device efficiency. This study addresses this challenge using a dual approach involving co‐self‐assembly buffer to enhance wettability interfacial contact buried film. A weakly acidic boronic acid derivative, 4‐N, N‐dimethylbenzeneboronic hydrochloride (4NPBA), is used co‐self‐assemble with regular SAM molecule on ITO FAI further increased film coverage 89%....

Although perovskite solar cells have achieved great breakthroughs in photoelectric conversion efficiency (PCE), some challenges still need to be addressed before commercialization. Lead leakage is harmful the environment and many methods are developed prevent lead leakage; among them, chemical adsorption has proved an effective way. Herein, a simple low‐cost strategy that can enhance device performance mitigate by applying l ‐phenylalanine interface of NiO x /perovskite reported. The results...

Intensive efforts have been devoted to the synthesis of thermoresponsive polymers with terminal <italic>N</italic>-alkyl-substituted groups.

A series of polystyrene sulfonate threaded in MIL-101Cr(<sc>iii</sc>) composites both with and without cross-linkers were synthesized.

Interface instability has evolved into the primary aspect that limits durability improvement of perovskite solar cells (PSCs). modification with suitable molecules is widely considered an effective path for improving interface state. Herein, ionic liquid modified layer, 1-ethyl-3-methylimidazolium aminoacetate (EMIMAE), brought to modify NiOx/perovskite interface. The EMIMAE layer can interact adjacent regulate growth, passivate defects in film, and promote charge transport PSCs. Eventually,...