Perovskite solar cells (PSCs) with efficiencies greater than 20% have been realized only expensive organic hole-transporting materials. We demonstrate PSCs that achieve stabilized exceeding copper(I) thiocyanate (CuSCN) as the hole extraction layer. A fast solvent removal method enabled creation of compact, highly conformal CuSCN layers facilitate rapid carrier and collection. The showed high thermal stability under long-term heating, although their operational was poor. This instability...

Abstract Hybrid organic–inorganic lead halide perovskite APbX 3 pigments, such as methylammonium iodide, have recently emerged excellent light harvesters in solid‐state mesoscopic solar cells. An important target for the further improvement of performance perovskite‐based photovoltaics is to extend their optical‐absorption onset into red enhance solar‐light harvesting. Herein, we show that this goal can be reached by using a mixture formamidinium (HN=CHNH + , FA) and (CH NH MA) cations A...

Semi-transparent perovskite solar cells with silver nanowires are stacked on CIGS and Si to achieve solid-state polycrystalline tandems efficiency improvement.

The success of perovskite solar cells has sparked enormous excitement in the photovoltaic community not only because unexpectedly high efficiencies but also future potential ascribed to such crystalline absorber materials. Far from being exhaustively studied terms solid-state properties, these materials surprised by anomalies as a huge apparent low-frequency dielectric constant and pronounced hysteretic current-voltage behavior. Here we show that methylammonium (but formamidinium)...

A fullerene derivative (α-bis-PCBM) is purified from an as-produced bis-phenyl-C61 -butyric acid methyl ester (bis-[60]PCBM) isomer mixture by preparative peak-recycling, high-performance liquid chromatography, and employed as a templating agent for solution processing of metal halide perovskite films via antisolvent method. The resulting α-bis-PCBM-containing solar cells achieve better stability, efficiency, reproducibility when compared with analogous containing PCBM. α-bis-PCBM fills the...

Organolead iodide perovskite, CH3NH3PbI3, was prepared in the form of nanowire by means a small quantity aprotic solvent two-step spin-coating procedure. One-dimensional perovskite with mean diameter 100 nm showed faster carrier separation presence hole transporting layer and higher lateral conductivity than three-dimensional nanocuboid crystal. Reduction dimensionality resulted hypsochromic shift both absorption fluorescence spectra, indicative more localized exciton states nanowires. The...

The synergistic combination of a Lewis base and acid enables perovskite solar cells with high efficiency stability.

Abstract Perovskite solar cells present one of the most prominent photovoltaic technologies, yet their stability, scalability, and engineering at molecular level remain challenging. We demonstrate a concept multifunctional modulation scalable operationally stable perovskite that exhibit exceptional solar-to-electric power conversion efficiencies. The judiciously designed bifunctional modulator SN links mercapto-tetrazolium (S) phenylammonium (N) moieties, which passivate surface defects,...

Redox mediators play a major role determining the photocurrent and photovoltage in dye-sensitized solar cells (DSCs). To maintain photocurrent, reduction of oxidized dye by redox mediator should be significantly faster than electron back transfer between TiO2 dye. The driving force for regeneration with sufficiently low to provide high photovoltages. With introduction our new copper complexes as promising DSCs both criteria are satisfied enhance power conversion efficiencies. In this study,...

Abstract Solid-state dye-sensitized solar cells currently suffer from issues such as inadequate nanopore filling, low conductivity and crystallization of hole-transport materials infiltrated in the mesoscopic TiO 2 scaffolds, leading to performances. Here we report a record 11% stable solid-state cell under standard air mass 1.5 global using material composed blend [Cu (4,4′,6,6′-tetramethyl-2,2′-bipyridine) ](bis(trifluoromethylsulfonyl)imide) ](bis(trifluoromethylsulfonyl)imide). The...

Methylammonium (MA)- and formamidinium (FA)-based organic–inorganic lead halide perovskites provide outstanding performance as photovoltaic materials, due to their versatility of fabrication power conversion efficiencies reaching over 22%. The proposition guanidinium (GUA)-doped perovskite materials generated considerable interest potential increase carrier lifetimes open-circuit voltages compared pure MAPbI3. However, simple size considerations based on the Goldschmidt tolerance factor...

A low band gap quinolizino acridine based molecule was designed and synthesized as new hole transporting material for organic-inorganic hybrid lead halide perovskite solar cells. The functionalized compound showed an effective mobility in the same range of state-of-the-art spiro-MeOTAD appropriate oxidation potential 5.23 eV vs vacuum level. device on this achieved high power conversion efficiency 12.8% under illumination 98.8 mW cm(-2), which better than well-known conditions. Moreover,...

We report on rapid halide exchange in metal perovskite of the general formula MAPbX3 (X = Cl, Br, or I). find that when is infiltrated a mesoscopic scaffold, substitution lattice strikingly fast, being completed within seconds minutes after contact with solution. An exception bromide by iodide, which slower and incomplete. Halide occurs rapidly even for planar films are several tens nanometers thick. However, thicker reaction requires hours, showing mesoscale greatly accelerates process. The...

Abstract Hybrid organic–inorganic lead halide perovskite APbX 3 pigments, such as methylammonium iodide, have recently emerged excellent light harvesters in solid‐state mesoscopic solar cells. An important target for the further improvement of performance perovskite‐based photovoltaics is to extend their optical‐absorption onset into red enhance solar‐light harvesting. Herein, we show that this goal can be reached by using a mixture formamidinium (HN=CHNH + , FA) and (CH NH MA) cations A...

Abstract The success of perovskite solar cells has sparked enormous excitement in the photovoltaic community not only because unexpectedly high efficiencies but also future potential ascribed to such crystalline absorber materials. Far from being exhaustively studied terms solid‐state properties, these materials surprised by anomalies as a huge apparent low‐frequency dielectric constant and pronounced hysteretic current–voltage behavior. Here we show that methylammonium (but formamidinium)...

Dye-sensitized solar cells (DSSCs) have shown significant potential for indoor and building-integrated photovoltaic applications. Herein we present three new D-A-π-A organic sensitizers, XY1, XY2, XY3, that exhibit high molar extinction coefficients a broad absorption range. Molecular modifications of these dyes, featuring benzothiadiazole (BTZ) auxiliary acceptor, were achieved by introducing thiophene heterocycle as well shifting the position BTZ on conjugated bridge. The ensuing enabled...

Recyclability of perovskite solar cells is demonstrated in a simple lab-scale process. Successful recovery valuable components as well cell performance underline the technology's potential sustainable PV.

Abstract Rapid extraction of photogenerated charge carriers is essential to achieve high efficiencies with perovskite solar cells (PSCs). Here, a new mesoscopic architecture as electron‐selective contact for PSCs featuring 40 nm sized TiO 2 beads endowed mesopores few nanometer diameters introduced. The bimodal pore distribution inherent these films produces very large area 200 m g −1 whose access by the light absorber facilitated interstitial voids between particles. Modification surface...

We report on both the intrinsic and extrinsic stability of a formamidinium lead bromide [CH(NH2)2PbBr3 = FAPbBr3] perovskite solar cell that yields high photovoltage. The fabrication FAPbBr3 devices, displaying an outstanding photovoltage 1.53 V power conversion efficiency over 8%, was realized by modifying mesoporous TiO2-FAPbBr3 interface using lithium treatment. Reasons for improved photovoltaic performance were revealed combination techniques, including photothermal deflection absorption...

We report a facile preparation approach of MAPbBr3, MAPbCl3, or FAPbBr3 (where MA = CH3NH3+ and FA CH(NH2)2+) perovskite nanowires via sequential synthesis MAPbI3 FAPbI3 with chemically controlled composition morphologies followed by an exchange halide anions. The formation sequence includes intermediate phases such as MAI-PbI2-DMF FAI-PbI2-DMF (DMF dimethylformamide) acting structure directing agent. 1D shape the adduct is preserved during conversion to perovskite. adducts play role key...

Abstract The surge of the power conversion efficiency metal halide lead perovskite solar cells comes with concerns, such as long‐term ecotoxicity compounds, their sensitivity toward moisture and oxygen, or scarcity some components. Most still suffer from serious stability problems when measured under real working conditions (maximum point tracking at 60°C). In long run, will certainly decide on fate CH 3 NH PbI related perovskites for use in photovoltaic modules. Herein, we show an effective...

Recently, hybrid organic-inorganic metal halide perovskites have gained prominence as potent light harvesters in thin film solid-state photovoltaics. In particular the solar-to-electric power conversion efficiency (PCE) of devices using CH(3)NH(3)PbI(3) sensitizer has increased from 3 to 20.1% within only a few years. This key material can be prepared by solution processing PbI(2) and CH(3)NH(3)I one step or sequential deposition. latter case an electron capturing support such TiO(2) is...