We report annealing-free compact TiO_x layer by atomic deposition for high efficiency flexible perovskite solar cells, and maintained 95% of the initial PCE after 1000 bending cycles with 10 mm radius.

We report on ferroelectric polarization behavior in CH3NH3PbI3 perovskite the dark and under illumination. Perovskite crystals with three different sizes of 700, 400, 100 nm were prepared for piezoresponse force microscopy (PFM) measurements. PFM results confirmed formation spontaneous absence electric field, where size dependency to was not significant. Whereas photoinduced stimulation significant without an external stimulated by poling further enhanced The retention also observed after...

Abstract Most research on perovskite solar cells has focused improving power-conversion efficiency and stability. However, if one could refurbish cells, their stability might not be a critical issue. From the perspective of cost effectiveness, failed, collected recycled; reuse gold electrodes transparent conducting glasses reduce price per watt photovoltaic modules. Herein, we present simple effective method for removing layer reusing mesoporous TiO 2 -coated glass substrate via selective...

Coupling dissimilar oxides in heterostructures allows the engineering of interfacial, optical, charge separation/transport and transfer properties photoanodes for photoelectrochemical (PEC) water splitting. Here, we demonstrate a double-heterojunction concept based on BiVO4/WO3/SnO2 triple-layer planar heterojunction (TPH) photoanode, which shows simultaneous improvements transport (∼93% at 1.23 V vs RHE) transmittance longer wavelengths (>500 nm). The TPH photoanode was prepared by facile...

MgO ultrathin nanolayers are able to efficiently retard charge recombination in perovskite solar cells.

Photovoltaic technologies based on perovskite absorber materials have led this optoelectronic field into a brand-new horizon. However, the present antisolvents used in one-step spin-coating method always encounter problems with very narrow process window. Herein, anisole is introduced method, and technology developed to fabricate thin films ultrawide processing window dimethylformamide (DMF):dimethyl sulfoxide (DMSO) ratio varying from 6:4 9:1 precursor solution, dripping time ranging 5 25...

Abstract Perovskite solar cells (PSCs) are the most promising candidates as next‐generation energy conversion systems. To design a highly efficient PSC, understanding electronic properties of mesoporous metal oxides is essential. Herein, we explore effect Nb doping TiO 2 on structure and photovoltaic PSCs. Light (0.5 1.0 at %) increased optical band gap slightly, but heavy (5.0 distinctively decreased it. The relative Fermi level position conduction similar for lightly Nb‐doped (NTO) undoped...

Enhancing hole extraction inside the perovskite layer is key factor for boosting photovoltaic performance. Realization of halide concentration gradient materials has been expected to exhibit rapid due precise bandgap tuning. Moreover, a formation Br-rich region on tri-iodide enhance moisture stability without loss current density. However, conventional synthetic techniques such as solution process have not achieved realization materials. In this report, we demonstrate fabrication Br mixed...

We report a highly efficient p–i–n type planar perovskite solar cell with hybrid PEDOT/NiOx hole-extraction layer. It has been found that the NiOx thin film as layer generally exhibits lower fill factor compared to conventionally used PEDOT:PSS film, whereas it shows higher photocurrent and photovoltage. The of NiOx-based can be significantly improved by treating surface dilute PEDOT solution. photoluminescence quenching study impedance spectroscopic (IS) analysis have revealed hole...

We fabricated a mesoporous perovskite solar cell with ∼14% conversion efficiency, and we investigated its beneficial grain boundary properties of the cells through use scanning probe microscopy. The CH3NH3Pb(I0.88,Br0.12)3 showed significant potential barrier bending at induced passivation. difference value in x = 0.00 sample is ∼50 mV, distribution positive lower than that 0.12 sample. also polarization hysteretic thin films by measuring local piezoresponse. Specifically, charged boundaries...

This review articles presents a recent progress of continuous process for perovskite module and related issue the commercialization step solar cells.

Abstract One of the most effective methods to achieve high‐performance perovskite solar cells (PSCs) is employ additives as crystallization agents or passivate defects. Tri‐iodide ion has been known an efficient additive improve crystallinity, grain size, and morphology films. However, generation control this tri‐iodide are challenging. Herein, method produce in a precursor solution using photoassisted process for application PSCs developed. Results suggest that can be synthesized rapidly...

In this work, efficient and bending durable flexible perovskite solar cells are obtained by modification of the film surface with 1- dodecanethiol (DT) followed drop-casting pre-dispersed thin nanosheets MoS2. Our results show an enhancement in efficiency device after interface revealed that DT MoS2 modified recovers completely its initial values PCE FF, current density, open-circuit voltage 300 cycles while standard resembles only 50% PCE. Following a light cycling protocol for...

Perovskite solar cells (PSCs) have attracted significant attention for their utility in next-generation energy production technology due to rapidly increasing power conversion efficiencies (PCEs), which recently reached levels comparable those of commercially successful Si cells. The simplicity and low cost the perovskite solution processability further heightened commercial viability. However, use N,N-dimethylformamide (DMF)─a volatile toxic solvent─in this process is considered be a major...

1-D core–shell structure, composed of SnO₂nanowire and epitaxial TiO₂nanoshell, is a promising electron transport layer for perovskite solar cells.

Abstract Cs 2 AgBiBr 6 , has recently gained wide attention as a possible alternative to lead‐halide perovskites, considering the nontoxicity and improved stability. However, this double perovskite suffers from defects, especially deep electron traps, severely hampering photovoltaic performance. This work reports simple method control crystallization by adding volatile salts into precursor solution. X‐ray diffraction patterns reveal that organic cation with suitable radius (such...

Abstract Enhancing electron extraction with efficient charge carrier separation, hybrid interface layer composed of amorphous TiO 2 and [6,6]‐Phenyl C61 butyric acid methyl ester (PCBM) is adopted to conventional n‐i‐p perovskite solar cells. In double layer, a‐TiO plays a role about selective contact material, while PC 60 BM help electrons rapidly extract from layers. From this new concept configuration, it possible achieve not only high power conversion efficiencies but also low hysteretic...

Abstract Recently, halide perovskites (HPs), which exhibit resistive switching (RS) behaviors, are proposed as a promising candidate for next‐generation memory because of their low power consumption, cost, and mechanical flexibility. However, HP‐based memories have crucial problems related to short endurance vague mechanism. Here, the RS behaviors switchable methylammonium lead iodide (MAPbI 3 ) nonswitchable rubidium (RbPbI mixtures reported it is elucidated on source phenomena. By...

Lead bromide perovskite with high bandgap and good stability has aroused broad interest for utilization in solar cells (PSCs) photovoltage, especially as a candidate the front cell of tandem cells. However, efficiency lead PSCs is still much lower than standard iodide PSCs, defects are one main limiting factors hindering device performance. The construction 2D/3D interface an effective way to passivate interfacial achieve efficient stable PSCs. Herein, facile phenethylammonium (PEABr)...

The spin-coating method, which is widely used for thin film device fabrication, incapable of large-area deposition or being performed continuously. In perovskite hybrid solar cells using CH3NH3PbI3 (MAPbI3), essential their potential use in mass production. Prior to replacing all the process fabrication cells, herein, a mesoporous TiO2 electron-collection layer fabricated by electro-spray (ESD) system. Moreover, impedance spectroscopy and transient photocurrent photovoltage measurements...

For commercialization of perovskite solar cells (PSCs), it is important to substitute the alternative electrode for Au decrease unit cost. From early stage, Ag exhibits a potential be good counter in PSCs; however, there an abnormal s-shaped J–V curve with electrode, and recovered as time passes. The perception aging-induced recovery process refutation raised stability issues are required commercial application electrodes. Herein, we compared aging effect PSCs electrodes found that only...