Morphology engineering has been recognized as an effective way to attain highly efficient and stable hybrid perovskite solar cells.

Solar-to-fuel conversion with organic-inorganic hybrid halide perovskites has attracted growing attention as a result of their excellent optoelectronic properties as well as the low temperature of the solution based fabrication process. However, the most comprehensively developed hybrid perovskite materials are comprised of the toxic metal lead, raising concerns about environmental health threats. Herein, a lead-free bismuth (Bi)-based hybrid perovskite showing in situ growth of heterojunctions is successfully developed at the interface of methylammonium bismuth iodide (MA 3 Bi 2 I 9) and tri(dimethylammonium) hexa-iodobismuthate (DMA 3 BiI 6) by a facile solvent engineering technique. The air-stable MA 3 Bi 2 I 9 /DMA 3 BiI 6 perovskite heterostructure with enhanced photoinduced charge separation exhibit outstanding visible-light-induced photocatalytic activity for H 2 evolution in aqueous hydrogen iodide solution. The powdered MA 3 Bi 2 I 9 /DMA 3 BiI 6 heterostructured composite (BBP-5) shows a H 2 evolution rate of 198.2 µmol h −1 g −1 without the addition of Pt co-catalysts under 100 mW cm −2 of visible-light (λ ≥ 420 nm) illumination.

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Homogeneous photocatalysis has considerably contributed to green applications such as energy production and environmental decontamination.

Lead-based hybrid perovskites have sparked substantial research interests due to immense progress in the fields of optoelectronics and photocatalysis. However, owing to the environmental issues of lead toxicity, lead-free hybrid...

For the first time, we demonstrate that 2D layered (MA)2CdCl4-based perovskite photoelectrodes show photoelectrochemical response with enhanced long-term stability.

Organic and/or inorganic halide perovskites become a new class of optoelectronic materials by virtue of excellent attractive physical and chemical characteristics. In this context, the zero-dimensional (0-D) cesium lead bromide...

electrochemical properties of the constituent materials as well as intra-and intermolecular interactions. Molecular self-assembly in π-conjugated systems is essential because it opens up an avenue to organic materials with desired spectroscopic properties and electrochemical activities. [1] While organic π-conjugated structures have been considerably studied, the exploration of aggregates or gels containing metalorganic materials is relatively rare. [2] Platinum emitters produce long-lived and phosphorescent 3 π,π* triplet excited states caused by heavy-atom-induced spin-orbital coupling; [3] the device performance could be dramatically improved by the insertion of metal centers into organic semiconductors. [4] Therefore, the triplet emitter, which structurally feature a four-coordinated square planar platinum(II) center with the chemical structure P−CC−Pt(PBu 3) 2 −CC−T− CC−Pt(PBu 3) 2 −CC−P (PPtTPtP, where T = 2,5-thienylene and P = phenyl), is investigated to explore the photophysical and electrochemical properties. The organic-based molecules, as the most common organic dyes and supramolecules in the ECL device have been extensively studied in the past decade. [5] The ECL is a phenomenon that involves the annihilation of radical ions generated The comprehension of triplet exciton mechanisms in organic-inorganic semiconductors has a significant impact on emerging optoelectronic and biosensing technologies. The capability to mutually integrate the photophysical properties of conjugated organic semiconductor with those of well-characterized heavy metals is therefore of utmost importance. Due to heavy-atom effect, the platinum-based triplet emitter, PPtTPtT, achieves highly efficient phosphorescence. Here, it is first demonstrated that π-conjugated PPtTPtT organometallics in electrochemiluminescence (ECL) devices exhibit precisely dual and blueshifted phosphorescence simultaneously induced by thermally activated delayed phosphorescence (TADP) and interchromophore exciton interaction in H-aggregates. Utilizing a combination of photophysical and electrochemical techniques, the distinctive ECL process involving energy sufficient singlet route (S-route), intersystem crossing, as well as triplet relaxation, hereafter called SIT-route, is reported for the first time. The hybrid TADP materials designed with donor-acceptor-donor system enable potential applications, including but not limited to organic light-emitting diodes, light-emitting electrochemical cells, imaging devices, and other bio-related detections.