2 research outputs found
(C<sub>6</sub>H<sub>5</sub>CH<sub>2</sub>NH<sub>3</sub>)<sub>2</sub>CuBr<sub>4</sub>: A Lead-Free, Highly Stable Two-Dimensional Perovskite for Solar Cell Applications
The
toxicity and the instability of lead-based perovskites might eventually
hamper the commercialization of perovskite solar cells. Here, we present
the optoelectronic properties and stability of a two-dimensional layered
(C<sub>6</sub>H<sub>5</sub>CH<sub>2</sub>ÂNH<sub>3</sub>)<sub>2</sub>CuBr<sub>4</sub> perovskite. This material has a low <i>E</i><sub>g</sub> of 1.81 eV and high absorption coefficient
of ∼1 × 10<sup>5</sup> cm<sup>–1</sup> at the most
intensive absorption at 539 nm, implying that it is suitable for light-harvesting
in thin film solar cells, especially in tandem solar cells. Furthermore,
X-ray diffraction (XRD), ultraviolet–visible (UV–vis)
absorption spectra, and thermogravimetric analysis (TGA) confirm the
high stability toward humidity, heat, and ultraviolet light. Initial
studies produce a mesoscopic solar cell with a power conversion efficiency
of 0.2%. Our work may offer some useful inspiration for the further
investigation of environment-friendly and stable organic–inorganic
perovskite photovoltaic materials