We developed a novel interface engineering strategy for highly stable and efficient SnO₂-based planar-perovskite solar cells.

Poly[2,5-bis(2-decyldodecyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione-(E)-1,2-di(2,2′-bithiophen-5-yl) ethene] (PDPPDBTE) was successfully incorporated as a p-type hole transporting material in solid-state organic–inorganic hybrid solar cells. The excellent optical and electrical properties of organo-lead halide perovskite (CH3NH3PbI3) nanocrystals used light harvesters yielded 9.2% power conversion efficiency (PCE) for the best-performing cell that exceeded value (7.6%) obtained from best...

Abstract Polymeric semiconductors have demonstrated great potential in the mass production of low‐cost, lightweight, flexible, and stretchable electronic devices, making them very attractive for commercial applications. Over past three decades, remarkable progress has been made donor–acceptor (D–A) polymer‐based field‐effect transistors, with their charge‐carrier mobility exceeding 10 cm 2 V −1 s . Numerous molecular designs D–A polymers emerged evolved along understanding charge transport...

A dopant–free polymeric hole transport material (HTM), <bold>RCP</bold>, based on benzo[1,2-<italic>b</italic>:4,5:<italic>b</italic>′]dithiophene and 2,1,3-benzothiadiazole exhibited a high efficiency of 17.3% in perovskite solar cell maintained its initial for over 1400 hours.

Charge carriers typically move faster in crystalline regions than amorphous conjugated polymers because polymer chains adopt a regular arrangement resulting high degree of π–π stacking regions. In contrast, the random chain orientation hinders connectivity between backbones; thus, it charge carrier delocalization. Various studies have attempted to enhance transport by increasing crystallinity. However, these approaches are inevitably limited semicrystalline nature polymers. Moreover,...

Abstract With the application of organic–inorganic hybrid perovskites to liquid‐type solar cells, unprecedented development perovskite cells (Per‐SCs) has been boosted by introduction solid‐state hole transport materials (HTMs). The removal liquid electrolyte lead improved efficiency and stability. Supported high‐quality films, certified Per‐SCs reached 25.2%. For assembled in a conventional structure (n–i–p), layer (HTL) plays an extra role preventing from external stimuli. In summary,...

In addition to having proper energy levels and high hole mobility (μh) without the use of dopants, hole-transporting materials (HTMs) used in n-i-p-type perovskite solar cells (PSCs) should be processed using green solvents enable environmentally friendly device fabrication. Although many HTMs have been assessed, due limited solubility solvents, no green-solvent-processable HTM has reported date. Here, we report on a HTM, an asymmetric D-A polymer (asy-PBTBDT) that exhibits superior even...

Transient mobility spectroscopy (TMS) is presented as a new tool to probe the charge carrier of commonly employed organic and inorganic semiconductors over relevant range densities. The density dependence used in hybrid photovoltaics gives insights into transport phenomena solid state dye sensitized solar cells.

An electron transporting layer (ETL) plays an important role in extracting electrons from a perovskite and blocking recombination between the fluorine-doped tin oxide (FTO) holes layers, especially planar solar cells. Dense TiO2 ETLs prepared by solution-processed spin-coating method (S-TiO2) are mainly used devices due to their ease of fabrication. Herein, we found that fatal morphological defects at S-TiO2 interface rough FTO surface, including irregular film thickness, discontinuous...

Understanding and controlling interfacial charge transfer at the heterojunction of optoelectronic devices is currently receiving extensive interest. Here, we study parameters that can influence electron extraction in planar perovskite solar cells (P-PSCs) using spin-coated SnO2 TiO2, anodized-TiO2 (a-TiO2), bilayered transport layers (ETL) composed TiO2 or on a-TiO2 (SnO2@a-TiO2). These are varied free energy difference (ΔG) values between ETL perovskites, mobility (μe) ETL, quality physical...

Abstract With the recent developments in efficiency of perovskite solar cells (PSCs), diverse functionalities are necessary for next‐generation charge‐transport layers. Specifically, hole‐transport layer (HTL) various synthesized materials modified with functional groups is explored. A novel donor–acceptor type polymer, alkoxy‐PTEG, composed benzo[1,2‐b:4,5: b ′]dithiophene and tetraethylene glycol (TEG)‐substituted 2,1,3‐benzothiadiazole reported. The alkoxy‐PTEG exhibits high solubility...

Highly efficient tin-based perovskite solar cells are prepared by introducing the formamidinium thiocyanate additive into quasi-two-dimensional perovskites.

For emerging biocompatible, wearable, and stretchable epidermal electronic devices, it is essential to realize novel conductors with the attributes of transparency, low-cost nontoxic components, green-solvent processbility, self-healing, thermal stabililty. Although conducting materials-rubber composites, ionic hydrogels, organogels have been developed, no material system that meets all outlined requirements has reported. Here, a series P(SPMA-r-MMA) polymers different ratios side chains...

We suggest phase transition-induced surface passivation of alkylammonium formates for effective defect perovskite, achieving significantly improved efficiency and thermal stability.

Electroadhesion provides a promising route to augment robotic functionalities with continuous, astrictive, and reversible adhesion force. However, the lack of suitable conductive/dielectric materials processing capabilities have impeded integration electroadhesive modules into soft robots requiring both mechanical compliance robustness. We present herein an iontronic adhesive based on dynamically crosslinked gel-elastomer system, including ionic organohydrogel as electrodes resilient...

Abstract The field of solar systems has undergone rapid development with the emergence special material, perovskite. Perovskite's unique mechanism, defect tolerance, enabled perovskite cells (PSCs) to achieve high power conversion efficiencies (PCEs), and many studies on this subject have been conducted. “Defect tolerance” indicates that defects in are primarily generated at shallow‐energy level do not occur through nonradiative recombination. However, also well formed films shallow can...

Abstract Improving the hydroxide conductivity and dimensional stability of anion exchange membranes (AEMs) while retaining their high alkaline is necessary to realize commercialization AEM water electrolysis (AEMWE). A strategy for improving AEMs by inserting fluorine atoms in core structure backbone reported, which not only reduces glass transition temperature polymer due steric strain, but also induces distinct phase separation inducing polarity discrimination facilitate formation ion...

A supramolecular network polymer consisting of a pair immiscible polymers, poly(butyl)methacrylate (PBMA) and polystyrene (PS), is described. urea guanosine (1, UG) 2,7-diamido-1,8-naphthyridine (2, DAN), which form an exceptionally strong quadruply hydrogen-bonding complex, are displayed at 1−10 mol % along the main backbone PBMA PS, respectively. 1H NMR studies show heterocomplexation between UG DAN exclusively. This high-fidelity, high-affinity connection two different coils molecular...

Small, volatile hydrocarbons, including trichloroethylene, vinyl chloride, carbon tetrachloride, benzene, and chloroform, are common environmental pollutants that pose serious health effects. We have developed transgenic poplar (Populus tremula x Populus alba) plants with greatly increased rates of metabolism removal these through the overexpression cytochrome P450 2E1, a key enzyme in variety halogenated compounds. The exhibited from hydroponic solution. When were exposed to gaseous they...

The butyl urea of guanosine (UG) presents an ADDA hydrogen-bonding array that is complementary to the DAAD 2,7-diamido-1,8-naphthyridine (DAN). stability DAN·UG complex was measured by fluorimetry using fluorescence resonance energy transfer (FRET) from naphthyridine ring a coumarin 343 moiety linked covalently UG unit. quadruply hydrogen-bonded extremely stable with association constant, Kassoc, 3 × 108 M-1. Unlike related modules, urea, UG, contains relatively fixed tautomeric form and...

A new method of free radical polymerization is developed on the basis visible light photocatalysis using Ru(bpy)3Cl2 that initiates and controls at ambient temperature. The α-haloester benzylic halide act as initiators can be activated through Ru(bpy)3+ photoredox cycle under irradiation. Successful polymerizations various methacrylates were realized a Xe arc lamp well household fluorescent source. initiated with immediately terminated upon turning off. In addition, molecular weight polymer...

Abstract Compact TiO 2 is widely used as an electron transport material in planar‐perovskite solar cells. However, ‐based cells exhibit low efficiencies due to intrinsic problems such the unsuitable conduction band energy and extraction ability of . Herein, planar layer (ETL) perovskite modified with ionic salt CuI via a simple one‐step spin‐coating process. The p‐type nature islands on surface leads modification alignment, resulting barrier‐free contacts increased open‐circuit voltage. It...