Electronic defects and grain boundaries of perovskite films will greatly deteriorate both the efficiency and the stability of perovskite solar cells (PSCs) and various methods aimed to reduce these defects have been proposed. Herein, an organic solid molecule of pyridinedicarboxylic acid (PDA) with one pyridine and two carboxylic acid groups is employed as a passivating agent to cure the defects by

Due to the attraction of fabricating highly efficient tandem solar cells, wide‐bandgap perovskite solar cells have attracted substantial interest in recent years. However, polycrystalline perovskite thin‐films show the existence of trap states at grain boundaries which diminish the optoelectronic properties of the perovskite and thus remains a challenge. Here, we demonstrate a one‐step solution‐processing

All inorganic perovskite solar cells (PSCs) have attracted a lot of attention in the past few years because of their preeminent thermal stability compared with the organic–inorganic hybrid PSCs. Among all kinds of all inorganic perovskites, CsPbI3 perovskite with a proper bandgap of ∽ 1.7 eV becomes the most competitive candidate. However, its poor phase stability, hydrophobicity and high‐density defects

Organic solar cells (OSCs) are considered to reach its second golden age with the profoundly improved power conversion efficiency (PCE) and device stability in recent years. The modification of the interface layer plays a significant role in achieving performance enhancement in OSCs. In this work, we reported for the use of the atomic layer deposited (ALD) ultrathin TiOx to modify the interface layer

[FeFe]‐hydrogenase ([FeFe]‐H2ase) mimics, inspired by hydrogenases in nature, have emerged as an important class of molecular catalysts toward hydrogen (H2) evolution. Here, a per‐6‐thiol‐cyclodextrin (CDSH) engineered [FeFe]‐H2ase mimic/CdSe quantum dot assembly is established for effective photocatalytic H2 evolution. In the assembly, CDSH is firstly anchored on CdSe QDs via the strong multidentate

In order to exploit the noble‐metal‐free, highly‐efficient and broad‐spectrum responsive photocatalyst of PDI, the self‐assembled perylenetetracarboxylic diimide (PDI) nanowire was loaded on the surface of the g‐C3N4 nanosheet and formed an all‐organic supramolecular 1D/2D heterogenous g‐C3N4/PDI with broad‐spectrum responsive (254 – 700 nm), which can improve the absorption efficiency of solar energy

Perovskite nanocrystals (PNCs) have recently emerged as a new type of promising photocatalytic semiconductor owing to their unique photoelectrochemical properties, including tunable bandgap and crystal structure, entire visible spectral response, and versatile chemical processability. However, under practical circumstance, this type of pure‐phase PNCs photocatalysts demonstrates poor stability, limited

Compositional tuning has been a major driving force behind the excellent optoelectronic properties observed in typical Pb‐based perovskites. For lead‐free perovskite derivatives, a challenge to understanding the connection between compositional tuning and intrinsic optoelectronic properties, hence a barrier towards boosting their performance, comes from the fact that multiple crystalline substructures

Low‐cost carbon‐based perovskite solar cells (C‐PSCs) without hole‐transport‐layer (HTL) and metal contact are highly promising for marketing. However, lower efficiency than conventional PSCs and instability during the penetration of moisture through the porous carbon electrode as well as the incoming of the UV light from the glass side of the device remain as challenges. Herein, a multifunctional

Sn‐based halide perovskites are the most promising alternatives for developing Pb‐free perovskite solar cell materials. However, the stability of Sn‐halide perovskites is the biggest concern for future developments. The phase stability and the doping level control should be resolved for Sn perovskites to compete with Pb‐based analogs. Here, interstitial engineering is used to enhance the stability

Sunlight‐driven catalytic reactions are appealing for resolving energy and environmental problems. Transition metal oxides (TMOs) and chalcogenides (TMCs) comprise one of the most popular categories of photocatalysts, thanks to their high stability, low cost, Earth abundance, and outstanding catalytic activity. Downsizing TMOs and TMCs to two‐dimensional (2D) materials offers additional opportunities

Metal halide perovskite solar cells are of interest for high altitude and space applications due to their light weight and versatile form factor. However, their resilience towards the particle spectrum encountered in space is still of concern. For space cells, the effect of these particles is condensed into an equivalent 1 MeV electron fluence. We probe the effect of high doses of 1 MeV e‐beam radiation

Synergistic modulation of photogenerated electrons and holes of g‐C3N4 especially achieved by simply modifying bimetallic species is highly desired for efficient photocatalytic CO2 reduction. Herein, we uniformly anchored ultrasmall subnano Ni‐ and Mn‐oxo clusters (average diameter of ca. 0.8 nm) on tailored chitosan oligomer (COS) functionalized ultrathin g‐C3N4 nanosheets via –OH and –NH2 in COS

Energy loss induced by non‐radiative recombinations plays a critical role in determining power conversion efficiencies in perovskite solar cells, while device stability impacts their long‐time reliability in the ambient environment. However, it is an important challenge to suppress energy loss and improve device stability simutaneously. Here, we report an interfacial layer of triphenylamine (TPA) :polystyrene

One of the great challenges facing organic solar cells (OSCs) for commercialisation, is increasing the active layer thickness without sacrificing the power conversion efficiency (PCE) and the fill factor (FF). Recently, PM6:Y6 as an OSC based on non‐fullerene acceptor (NFA) has excited the community because of its PCE reaching as high as 15.9%; however, by increasing the thickness, the PCE drops due

This contribution evaluates the effect of absorber off‐stoichiometry in wide‐gap (Ag,Cu)(In,Ga)Se2 (ACIGS) solar cells. It is found that ACIGS films show an increased tendency to form ordered vacancy compounds (OVCs) with increasing Ga and Ag contents. Very little tolerance to off‐stoichiometry is detected for absorber compositions giving the desired properties of: i) an optimum band gap (E G ) for

Solar cells with varied absorbers, ranging from crystalline silicon to perovskite materials, are very vulnerable to water. Expensive and complicated encapsulation is needed to protect the devices. Thus, it is highly desirable to achieve encapsulation‐free solar cells with high water tolerance. In this work, encapsulation‐free Selenium (Se)‐based solar cells (SSCs) with hydrophobic polymers as electron

We demonstrate the fabrication of a silicon solar cell on 6‐inch pseudo‐square p‐type Czochralski‐grown silicon wafers featuring poly‐Si based passivating contacts for electrons at the cell rear side and screen‐printed aluminum fingers at the front side that form local p+ regions. The undiffused front surface is passivated with an Al2O3/SiNx stack and the rear surface is covered with a thin oxide/

Polymeric carbon nitride (PCN) is a metal‐free semiconductor that has received extensive research attention due to the unique advantages such as low‐cost, high stability, and visible‐light response. But pristine PCN is not an ideal photocatalyst because of fast electron‐hole recombination and inert surface for molecular adsorption. Nevertheless, benefiting from the N‐linked tri‐s‐triazine structure

To date substrate‐configuration metal‐halide perovskite solar cells (PSCs) fabricated on opaque substrates such as metal foils provide inferior efficiencies compared to superstrate‐configuration cells employing a glass substrate. Understanding, quantifying, and solving the underlying causes will benefit future building integration of PSCs. Here a substrate‐configuration PSC on planarized steel is presented

With the depletion of fossil fuels and environmental contamination, photocatalytic H2 production under visible‐light condition has become an essential issue and received extensive attention. Co‐catalysts play a critical role in improving photocatalytic H2 generation of photocatalysts. However, co‐catalysts frequently need additional synthesis steps for loading on the surface of photocatalysts, and

Perovskite solar cells (PSCs) with advantages of exceptional photovoltaic performance and facile solution‐processed fabrication have shown great potential in future scalable application. After about a decade of rapid development, this new PSCs technology demonstrate over 25% efficiency, a comparable performance with traditional silicon solar cells. Further development of PSCs in the direction of scalable

One pot synergistic/cascade reactions, in which two or more reactions, either simultaneously or in a sequential fashion, are realized in one pot, represents a promising direction for future catalysis. In particular, the use of solar light to initiate the synergistic/cascade reactions in one pot has attracted increasing attention, with the aim of developing renewable energy based processes. Metal‐organic