Abstract The low‐dimensional (LD) perovskites are proven to be capable of blocking moisture erosion and thereby improving the photovoltaic device stability. In this review, perovskite materials carefully summarized that induced by A‐position organic substituents, starting from crystal microstructure electronic structure LD (2D, 1D, 0D) with regulating dimensions, combined first principles calculation (DFT). By further studying thermodynamics dynamics crystallization nucleation growth LD–3D...

The widespread application of quick response (QR) codes has brought data security issues to the forefront, largely due ease accessibility. In this study, we designed a two-dimensional perovskite material, (FPA)2PbBr4 (FPA = (R)-1-(4-fluorophenyl)ethylamine), enhance by increasing retrieval threshold QR codes. This material exhibits little absorption in visible light spectrum, with an abrupt edge at 402 nm. Notably, introducing F– anion into spacer and inducing protonation, dipole moment from...

Abstract Inorganic CsPbI x Br 3− perovskite solar cells (PSCs) have gained enormous interest due to their excellent thermal stabilities. However, intrinsically poor moisture stability hampers further development. Herein, a chromium‐based metal–organic framework group is intercalated inside the inorganic PbI framework, resulting in new multiple‐dimensional electronically coupled 2 perovskite. In this structurally and perovskite, π‐conjugated terpyridyl can delocalize excited valence...

Low-dimensional organic-inorganic hybrid perovskites (OIHPs) with broadband emission attract immense scientific interest due to their potential application for the next generation of solid-state lighting. However, low exciton utilization, organic cations generally adjust structure rather than contribute band edge affect optical properties. Based on this, OIHPs are usually allowed obtain a photoluminescence quantum yield (PLQY). Herein, good charge transfer carrier (p-phenylenediamine, PPDA)...

Metal halide perovskites (MHPs), as a new generation optoelectronic materials, have attracted surge of attention due to their remarkable intrinsic properties.

The fast‐track development in all‐inorganic perovskite photovoltaics for high efficiency are still facing the defect issues including vacancy, undercoordinated ions, and dislocation at surface/interface of materials. Herein, three kinds small‐molecules difluorobenzylamine (DFBA) found to act as interfacial modification materials stabilize enhance carbon CsPbI 3– x Br solar cell. fluorine atoms with different positions benzene ring demonstrated by density‐functional theory simulations...

Abstract Despite inorganic CsPbI 3− x Br perovskite solar cells (PSCs) being promising in thermal stability, the degradation and severe nonradiative recombination at interface hamper their further development. Herein, typical MXene material, that is, Ti 3 C 2 T , is employed to be buried prior absorber layer device, which multi‐functionalizes as‐prepared electron‐transfer layers by means of both fascinating preferential crystallization and/or accelerating charge extraction with respect an...

Abstract Two-dimensional (2D) nanomaterials have demonstrated great potential in the field of flexible gas sensing due to their inherent high specific surface areas, unique electronic properties and flexibility property. However, numerous challenges including sensitivity, selectivity, response time, recovery stability be addressed before practical application detection field. Development graphene-like 2D/2D nanocomposites as an efficient strategy achieve high-performance 2D sensor has been...

Lead-free double perovskites have attracted noteworthy attention due to their compositional flexibility and electronic diversity. In this study, we hydrothermally grow a new class of Cs2AgxNa1–xFeCl6 (0 ≤ x 1) perovskite single crystals with high thermal stability. The substitution B-site cation allows regulate the crystallographic band structure, which gives rise enlarged absorbance close near-infrared region (∼800 nm) via composition engineering. Ultrafast transient absorption spectroscopy...

Abstract Despite the rapid development of CsPbI x Br 3− (0 ≤ 3) inorganic perovskite solar cells, associated with their superior thermal stability, low moisture stability limits commercial deployment. In this study, 1D‐2D‐3D multidimensional coupled perovskites are prepared by means an in situ self‐integration approach. This pioneering method allows incorporating thus far unreported 1D‐Tpy 2 Pb 3 I 6 and 2D‐TpyPb (Tpy; terpyridine) perovskites. Heterojunction demonstrate against water...

Abstract Organic–inorganic hybrid metal halide perovskites have played an important role in optoelectronic and photonic community owing to their remarkably high photoluminescence quantum yields color tunability with ultrafast emission performance. Herein, two kinds of novel perovskite single crystals, i.e., TpyInCl 3 5 , grown by means a solution‐processed hydrothermal method are innovatively designed. Regulating the polarity precursor solution allows fine‐tune light from pink blue extremely...

The stability of perovskite solar cells has been identified as the bottleneck for their industrialization. With an aim at tackling this challenge, we self-synthesize a thus-far unreported linearly rotatable structure perovskite, i.e., TrMAPbX3 (X = Br, I). as-prepared hybrid is observed to demonstrate extremely high during device operation with electric field strength and temperature, which associated good lattice-matching heterojunction between 3D inorganic domain within wide temperature...

A volatile solid additive strategy, which can effectively optimize the morphology of photoactive layer with an ideal domain size and purity, has emerged as a promising approach to improve photovoltaic performance organic solar cells (OSCs). However, precise role additives in modulating charge exciton dynamics, especially recombination process, remains not fully understand. In this study, additive, 1,4-diiodo-2,5-dimethoxybenzene (DIDOB), is developed OSCs conduct comprehensive investigation...

Abstract Multifunctional lead-free double perovskites demonstrate remarkable potential towards applications in various fields. Herein, an environmentally-friendly, low-cost, high-throughput Cs 2 NaFeCl 6 single crystal with exceedingly high thermal stability is designed and grown. It obtains a cubic lattice system the temperature range of 80–500 K, accompanied by completely reversible chromatic variation ranging from yellow to black. Importantly, intriguing thermochromism proved own...

Temperature-dependent phase transition of CsPbI 3− x Br perovskite is synchronously observed in a reciprocal space, and its photophysical properties are systematically studied by exploring the carrier–phonon coupling excitons transport.

Despite tin perovskite showing excellent optoelectronic properties such as ideal bandgap and high carrier mobility, the intrinsic instability of due to reaction with water oxygen that significantly shadows its application. Herein, a molecule substituted two fluorine atoms for construction low‐dimensional is explored. Tin film based on this shows much enhanced hydrophobicity, bringing stability in atmosphere. The unencapsulated device can be kept over 200 h atmospheric environment. In...

We investigate the performances of near-ultraviolet (about 350 nm–360 nm) light-emitting diodes (LEDs) each with specifically designed irregular sawtooth electron blocking layer (EBL) by using APSYS simulation program. The internal quantum efficiencies (IQEs), light output powers, carrier concentrations in wells, energy-band diagrams, and electrostatic fields are analyzed carefully. results indicate that LEDs composition-graded p-AlxGa1−xN EBLs have better than their counterparts stationary...

Multidimensional perovskite techniques are of intense research interest since they proved to be advantageous enhance the stability. Thereinto, structure engineering strategy has been widely used regulate low dimensional (LD) structures and obtain expected optoelectronic properties. In this work, we intercalate a thus far unreported metallic coordination compound [Ga-Tpy2]3+ (Tpy: 2,2′;6′,2″-terpyridine) inorganic Pb–I building block as A-site organic group, zero (0D) [Ga-Tpy2]PbI5...

Tin-based perovskite has been widely studied due to its green, nontoxic, and excellent photoelectric physical properties. However, the high sensitivity of Sn2+ cations against moisture oxygen was a huge challenge for preparing stable solar cells. In this study, 4-(aminomethyl) pyridine (4AP) cation is introduced construct two-dimensional (2D) Dion–Jacobson (DJ) 4APSnX4 (X = Cl, Br, I). First, through halogen component regulation, charge transfer efficiency improved. Then, it found that...

Low-dimensional perovskites (LDPs) have enormous potential for the development of advanced optoelectronic devices and tackling stability issue commercial application perovskites. However, quantified structural dimensionality prediction LDPs is still an intractable issue. Herein, we develop a self-established machine learning (ML)-assisted approach to predict based on 195 reported amines that are classified as two-dimensional, one-dimensional, zero-dimensional. The optimal K-nearest neighbor...