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In recent years, organic–inorganic hybrid metal halides have emerged as a highly promising class of semiconducting light emitting diodes (LEDs) due to their fascinating photoluminescence properties. Here, by specifically selecting different organic cations as templates, a series of new hybrid cuprous halides have been solvothermally prepared, namely [Me-Py]CuI2 (1), [(Me)2-DABCO]Cu2I4 (2), [Me-MePy]Cu2I3 (3), and [H2DABCO]Cu3X5 (X = I (4) and Br (5)). These hybrid cuprous halides feature one-dimensional (1D) [CuI2]−, [Cu2I3]− and [Cu3X5]2− (X = Br, I) chains surrounded and charge-balanced by organic cations. Under UV photoexcitation, these hybrid cuprous halides exhibit strong tunable photoluminescence from cyan (480 nm) to red (675 nm) emissions with large Stokes shifts (345 nm). The intrinsic nature of PL emissions is also investigated based on temperature-dependent PL emission, lifetime, photoluminescence quantum efficiencies, etc. [ABSTRACT FROM AUTHOR]

The enormous volume expansion during cycling and poor electron conductivity of SnS2 limit its cycling stability and high rate capability. Herein, flower-like SnS2 anchored on 3D carbon nanofiber structures were designed and synthesized by a simple hydrothermal method. Pyrolyzed bacterial cellulose as 3D carbon nanofibers can not only offer a continuous pathway of Li+ and electrons, but can also migrate the serious volume change of SnS2 during charging and discharging. The obtained composite shows a specific capacity of 408.8 mA h g−1 even after 1500 cycles at 10 A g−1, and almost no specific capacity decay after 20 cycles with a retention of 97.5%. [ABSTRACT FROM AUTHOR]