Developing efficient and stable luminescence materials is critical for avoiding unnecessary waste of electric energy. Single emitters with broadband emission, like lead halide perovskites, are attracting attention for artificial illumination and display applications. To develop lead-free and stable perovskites with broadband emission, researchers from China's Dalian Institute of Chemical Physics, University of Chinese Academy of Sciences (CAS) and Shandong University have examined low-dimensional bismuth halide perovskites.
'The single emitters with broadband emission can circumvent critical problems faced in the traditional mixed and multicomponent emitters such as the efficiency losses caused by self-absorption, the complex device structure, and the colors instability due to the different degradation rates of phosphors,' said paper author Rengui Li, a professor with the State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS). 'Lead halide perovskites have emerged as highly attractive next-generation optoelectronic materials for light-emitting applications due to their extraordinary photoelectric properties.'