The development of hole-transport materials (HTMs) with high mobility, long-term stability, and comprehensive passivation is significant for simultaneously improving the efficiency stability perovskite solar cells (PVSCs). Herein, two donor-acceptor (D-A) conjugated polymers PBTI PFBTI alternating benzodithiophene (BDT) bithiophene imide (BTI) units are successfully developed desirable hole mobilities due to good planarity extended conjugation molecular backbone. Both copolymers can be...

Here we report for the first time a monolithic perovskite–CIGS tandem (CIGS = Cu(In,Ga)Se2) solar cell on flexible conductive steel substrate with an efficiency of 18.1%, highest to date, representing important step toward perovskite-based photovoltaics.

An efficient photocatalyst based on the broadband solar response molecular system was designed and constructed for pollutant degradation in near-neutral conditions via utilizing guest polyoxometalate cluster sensitized with electron deficient host network. Photoelectrochemical analysis reveals electron-hole pairs are generated efficiently upon both visible NIR light excitation. Its photocatalytic activity regions is enhanced because of contribution from broad absorption copper-viologen...

A convenient colorimetric molecular system constructed by the zinc viologen-carboxylate framework is developed for naked eye detection of instantaneous UV exposure levels. Only narrow-band absorption in regions and a unique interpenetrated structure its colorless crystal enable to give fast response toward irradiance with intensity as low 0.001 mw/cm2.

Passivation strategies are considered as one of the most efficient methods to suppress nonradiative recombination organic–inorganic lead halide perovskite solar cells (PSCs), leading tremendous photovoltaic performance. An innovative 2D polymer, graphitic carbon nitride (g‐C 3 N 4 ), well various organic groups (amino, sulfonic, nitrato, and hydroxy group), widely used passivation agents, according previous reports. Anchoring g‐C aforementioned additives in can both heal charged defects...

Two photo/thermal responsive donor–acceptor molecular systems have been designed and synthesized based on interpenetrating metal organic frameworks (MOFs). For compound 1 [Zn(CPBPY)(HBTC)]·H2O, the formation of a 4-fold diamond structure displays reversible photochromic behavior upon light/heat stimuli with an offset π stacking figure for donor carboxylate acceptor viologen units. By comparison, 2-fold parallel framework in 2 [Zn2(CPBPY)2(BTEC)]·2H2O·2CH3CH2OH exhibits photo coloration...

Electrochemical reduction of CO2 (CO2 RR) to value-added chemicals is an effective way harvest renewable energy and utilize carbon dioxide. However, the electrocatalysts for RR suffer from insufficient activity selectivity due limitation activation. In this work, a Ni-doped Bi nanosheet (Ni@Bi-NS) electrocatalyst synthesized electrochemical HCOOH. Physicochemical characterization methods are extensively used investigate composition structure materials. results reveal that production HCOOH,...

Abstract The fabrication of multicolor luminescent glass with simultaneous controlling the distribution emission colors within a monolithic medium has been tremendous challenge, which, however, could be attractive for diverse photonic applications from optical storage to information encryption. Here, space‐selective doping method based on stereolithographic technique is designed, enabling control domain active luminescence ions, such as Eu 3+ , Ce Tb and Pr in 3D‐printed single silica...

All‐inorganic perovskite solar cells (PVSCs) have drawn widespread attention for its superior thermal stability. Carbon‐based devices are promising to demonstrate excellent long‐term operational stability due the hydrophobicity of carbon materials and abandon organic hole‐transporting (HTMs). However, difficulty control crystallinity process poor morphology leads serious non‐radiative recombination, resulting in low V OC power conversion efficiency (PCE). In this article, crystal formation...

New energy technology is in urgent demand for waste heat harvesting and utilization saving renewable development. Herein, an aqueous organic redox flow battery (AORFB) with designed tripyridinium–triazine radicals ((TPyTz)··4+)/(TPyTz)·5+) as the negative couple constructed a thermoelectricity system. The electrochemical test indicates that (TPyTz)··4+/(TPyTz)·5+ shows interesting potential change about 27 mV accompanied by system temperature varying from 298 K to 343 K. Nuclear magnetic...

Mesoporous anatase TiO2 nanomaterials (MATNs) with both large specific surface areas and structural coherence are highly desirable to achieve excellent physicochemical properties for photovoltaic applications, but the existing synthesis methods either need templates or cause pollution. Herein we report a simple, template-free, green approach synthesize MATNs consisting of interconnected nanoparticles. The Ti-complex intermediates were first prepared using titanium isopropoxide acetic acid in...

MAPbI3, one of the archetypical metal halide perovskites, is an exciting semiconductor for a variety optoelectronic applications. The photoexcited charge-carrier diffusion and recombination are important metrics in devices. Defects grain interiors boundaries MAPbI3 films cause significant nonradiative energy losses. Besides defect impact, carrier anisotropy introduced by structural electronic discrepancies related to crystal orientation vital topics. Here, large-sized single crystals (SCs)...

Nanotube (NT) layers of TiO2 are important one-dimensional nanostructures for advanced applications. ZnO nanowire arrays prepared through electrochemical deposition with tuned morphological properties converted into anatase NTs by using a titanate solution adjusted to an ad hoc pH. The tubes polycrystalline and their diameter length can be obtain tailored dimensions. integrated in CH3 NH3 PbI3 perovskite solar cells (PSCs). Their morphology is optimized maximum performance compared...

Perovskite solar cells (PSCs) have achieved a certified efficiency of 25.2% within the past few years. One effective methods to obtain highly efficient PSCs is moisture-assisted annealing process. However, role moisture in preparation high-performance subject intense debate. Herein, critical effect formamidinium-based with improved-quality perovskite films systematically investigated based on diverse characterizations. Consequently, optimal amount determined at 50% relative humidity (RH),...

Zero-dimensional (0D) inorganic perovskites, particularly Cs4PbBr6, have been attracting wide attention due to their excellent photoluminescence (PL) efficiency and spectral color purity. The PL origin of Cs4PbBr6 the underlying photophysics, however, draw intense debate remain controversial. Revealing photo-excited carrier generation, separation, recombination, as well roles that mobile ions play, is crucial helpful deeply understand photo-physical property. Photoconductivity one effective...

An electron transfer molecular system has been developed for investigating the correlation between crystal structure and photochromic properties with N-aromatic-substituted viologen ligand as building unit. The designed photoactive material displays rapid photoswitching behavior reversible color changes due to hydrogen-bonding assisted its porous structural motif. Interestingly, desorption of lattice water molecules from increases photoresponse speed which can be attributed fact that...

Two-dimensional CsPb₂Cl₅ materials with broadband emission and self-trapped exciton have great potential in the field of optoelectronics.

2H-type lead iodide (PbI2) is a two-dimensional (2D) layered semiconductor and has recently received considerable attention as precursor for halide perovskite solar cells. Although the pressure-induced structural phase transitions of PbI2 have been investigated several decades, detailed crystalline structure at high pressure still elusive because lacking in situ x-ray diffraction (XRD) studies. In this report, Raman spectra XRD patterns 2H-PbI2 under diamond-anvil cell. Both provide...

Abstract Water stability is a crucial issue always addressed for commercial practical application of perovskite quantum dots (QDs). Recent advances in ligand engineering situ synthesis water‐stable QDs have attracted growing interest. However, the exact mechanism remains unclear. Here, function 4‐bromobutyric acid (BBA) and oleylamine (OLA) systematically studied CsPbX 3 (X = Br I) confirms that zwitterionic ligands generated by BBA OLA are anchored on surface, thus preventing water from...

The optoelectronic performances of MAPbI3 are related to film morphology and crystal orientation. However, it is difficult directly quantify the anisotropy in thin films because controlling growth-oriented grains measuring difference within micro–nono regions have great technological challenges. Here, taking advantages pseudo-cubic single crystals (SCs) exposed with (110), (002), (200) facets, anisotropies compared. It reveals that periodic positive negative potential distributions at...

A lead-iodide single crystal semiconductor with multi-orientation photoconductive property and broad spectrum absorption has been designed constructed by engineering technique.

A zinc coordination complex with terpyridyl derivative as ligand exhibits mechanochromic and thermochromic luminescence behaviors reversible color changes visible to the naked eye from pink blue-purple upon mechanical grinding blue heating.