Publication | Closed Access
Syntheses, Structures, and Photoluminescence of Copper-Based Halides
25
Citations
42
References
2023
Year
Copper-based halides have been found to be a new family of lead-free materials with high stability and superior optoelectrical properties. In this work, we report the photoluminescence of the known (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuBr<sub>3</sub> and the discovery of three new compounds, (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuCl<sub>3</sub>, (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuCl<sub>3</sub>·H<sub>2</sub>O, and (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuI<sub>3</sub>, which all exhibit efficient light emissions. All these compounds have monoclinic structures with the same space group (<i>P</i>2<sub>1</sub>/<i>c</i>) and zero-dimensional (0D) structures, which can be viewed as the assembly of promising aromatic molecules and different copper halide tetrahedrons. Upon the irradiation of deep ultraviolet light, (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuCl<sub>3</sub>, (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuBr<sub>3</sub>,<sub>,</sub> and (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuI<sub>3</sub> show green emission peaking at ∼520 nm with a photoluminescent quantum yield (PLQY) of 3.38, 35.19, and 17.81%, while (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuCl<sub>3</sub>·H<sub>2</sub>O displays yellow emission centered at ∼532 nm with a PLQY of 2.88%. A white light-emitting diode (WLED) was successfully fabricated by employing (C<sub>8</sub>H<sub>14</sub>N<sub>2</sub>)CuBr<sub>3</sub> as a green emitter, demonstrating the potential of copper halides for applications in the green lighting field.
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