Design and Synthesis of 1D-Polymeric Chain Based [(CH₃NH₃)₃Bi₂Cl₉]<i>n</i> Perovskite: A New Light Absorber Material for Lead Free Perovskite Solar Cells

Although traditional perovskite solar cells have made tremendous progress in terms of efficiency, the presence of toxic lead has restricted their commercialization. Herein, we report the first example of a facile synthesis and a newly designed highly stable lead free methylammonium bismuth chloride in the form of 1D-polymeric chain based perovskite. The formation of a 1D-polymeric chain with formula [(CH₃NH₃)₃Bi₂Cl₉]<i>_n</i> (<b>1</b>) has been authenticated by its single crystal X-ray diffraction (SCXRD) studies. The lead free <b>1</b> has been employed as an alternative to the traditional CH₃NH₃PbX₃ perovskite with an excellent open circuit voltage of 430 mV

Design and Synthesis of 1D-Polymeric Chain Based [(CH₃NH₃)₃Bi₂Cl₉]<i>n</i> Perovskite: A New Light Absorber Material for Lead Free Perovskite Solar Cells

Although traditional perovskite solar cells have made tremendous progress in terms of efficiency, the presence of toxic lead has restricted their commercialization. Herein, we report the first example of a facile synthesis and a newly designed highly stable lead free methylammonium bismuth chloride in the form of 1D-polymeric chain based perovskite. The formation of a 1D-polymeric chain with formula [(CH₃NH₃)₃Bi₂Cl₉]<i>_n</i> (<b>1</b>) has been authenticated by its single crystal X-ray diffraction (SCXRD) studies. The lead free <b>1</b> has been employed as an alternative to the traditional CH₃NH₃PbX₃ perovskite with an excellent open circuit voltage of 430 mV

Vacuum-Mediated Single-Crystal-to-Single-Crystal (SCSC) Transformation in Na-MOFs: Rare to Novel Topology and Activation of Nitrogen in Triazole Moieties

We report a rare example of facile in situ synthesis of <b>Na-MOF1</b> that undergoes vacuum-mediated single-crystal-to-single-crystal (SCSC) transformations from rare parallel polycatenated <b>kgd</b> nets to new and novel 3-periodic 3,3,12-c net topology (named smm1). Further, SCSC transformation of <b>Na-MOF1</b> to <b>Na-MOF2</b> reveals activation of N–N atoms in 1,2,3-triazole unit. <b>Na-MOF1</b> and <b>Na-MOF2</b> were authenticated by single-crystal X-ray studies, and the bulk was confirmed by powder X-ray diffraction studies

Phosphorization Engineering on a MOF-Derived Metal Phosphide Heterostructure (Cu/Cu₃P@NC) as an Electrode for Enhanced Supercapacitor Performance

A highly conductive and rationally constructed metal–organic framework (MOF)-derived metal phosphide with a carbonaceous nanostructure is a meticulous architecture toward the development of electrode materials for energy storage devices. Herein, we report a facile strategy to design and construct a new three-dimensional (3D) Cu-MOF via a solvent diffusion method at ambient temperature, which was authenticated by a single-crystal X-ray diffraction study, revealing a novel topology of (2,4,7)-connected three-nodal net named smm4. Nevertheless, the poor conductivity of pristine MOFs is a major bottleneck hindering their capacitance. To overcome this, we demonstrated an MOF-derived Cu3P/Cu@NC heterostructure via low-temperature phosphorization of Cu-MOF. The electronic and ionic diffusion kinetics in Cu3P/Cu@NC were improved due to the synergistic effects of the heterostructure. The as-prepared Cu3P/Cu@NC heterostructure electrode delivers a specific capacity of 540 C g–1 at 1 A g–1 with outstanding rate performance (190 C g–1 at 20 A g–1) and cycle stability (91% capacity retention after 10,000 cycles). Moreover, the assembled asymmetric solid-state supercapacitor (ASC) achieved a high energy density/power density of 45.5 Wh kg–1/7.98 kW kg–1 with a wide operating voltage (1.6 V). Long-term stable capacity retention (87.2%) was accomplished after 5000 cycles. These robust electrochemical performances suggest that the Cu3P/Cu@NC heterostructure is a suitable electrode material for supercapacitor applications