Acetate effects: Operando electrochemical quartz crystal microbalance and ultraviolet-visible spectrophotometry coupled cyclic voltammetry are used to examine the behaviours change in the electrolytes with or without acetates. By identifyi...
Uncovering the Role of Electronic Doping in Lead‐free Perovskite (CH3NH3)2CuCl4‐xBrx and Solar Cells Fabrication
Von Wiley-VCH zur Verfügung gestellt
An uncertain ratio: This study concerns the synthesis and properties of (CH3NH3)2CuCl4-x Br x as an environmentally benign alternative to lead-based perovskites. This copper mixed halide perovskite exhibits a narrow absorption with a bandgap of 2.54–2.63 eV related to the halide ratio disparity, demonstrating the impact of halides to optimize methylammonium copper perovskite stability and provide a pathway to eco-friendly perovskites for optoelectronic applications.
Lead halide perovskites are attractive pigments to fabricate solar cells in the laboratory, owing to their high power conversion efficiency. However, given the presence of Pb, such materials also have a high level of toxicity and are carcinogenic for humans and aquatic life. Arguably, this hampers their acceptability for immediate commercialization. This study entails the synthesis, optoelectronic properties, and photovoltaic parameters of two-dimensional copper-based perovskites as an environmentally benign alternative to lead-based perovskites. The perovskites – (CH3NH3)2CuCl4-x Br x with x=0.3 and 0.66 – are derivatives of the stable (CH3NH3)2CuCl4. The single crystals and powders diffractograms suggest compositions with variations in Cl/Br ratio and dissimilar bromine localization in the inorganic framework. The copper mixed halide perovskite exhibits a narrow absorption with a bandgap of 2.54–2.63 eV related to the halide ratio disparity (crystal color variation). These findings demonstrate the impact of halides to optimize the stability of methylammonium copper perovskites and provide an effective pathway to design eco-friendly perovskites for optoelectronic applications.Zum Volltext
Jetzt nächsten Artikel lesen:
Überprüfung Ihres Anmeldestatus ...
Wenn Sie ein registrierter Benutzer sind, zeigen wir in Kürze den vollständigen Artikel.