Hemamala Karunadasa1,4,Kurt Lindquist1,Michael Boles1,Bridget Connor1,Stephanie Mack2,3,Jeffrey Neaton2,3
Stanford University1,Lawrence Berkeley National Laboratory2,University of California, Berkeley3,SLAC National Accelerator Laboratory4
Hemamala Karunadasa1,4,Kurt Lindquist1,Michael Boles1,Bridget Connor1,Stephanie Mack2,3,Jeffrey Neaton2,3
Stanford University1,Lawrence Berkeley National Laboratory2,University of California, Berkeley3,SLAC National Accelerator Laboratory4
Halide perovskites offer a flexible platform for tuning optoelectronic properties through changes in composition, connectivity, and dimensionality. I will present our recent studies on further increasing the accessible electronic structures of this versatile family of materials by alloying two or more metals at a single octahedral site. I will discuss the consequences of both homo- and heterovalent alloying<br/>and present halide perovskites with three stoichiometric metals and an unprecedented perovskite architecture with only trivalent metals and unusually small bandgaps arising from metal alloying.