Kin Ting Chang

Synthesis and Crystal Structures A typical double perovskite structure is represented by the formula of A 2 M I M III X 6 . Here, we employed a hydrothermal method to synthesize single crystals of HE-DPs alloyed at M I - and M III -sites, while keeping the A site and halide fixed, namely, Cs 2 M I M III Cl 6 . The M I site is alloyed with Na + and Ag + , while the M III site is alloyed with In 3+ , Sb 3+ , Bi 3+ , and various Ln 3+ ions (Er 3+ , Yb 3+ , Dy 3+ , Tb 3+ , or Ho 3+ ).

Introduction Click to copy section linkSection link copied! Halide perovskites have emerged as promising semiconductor materials, driving significant advancements in a wide range of optoelectronic applications including solar cells, light-emitting diodes, and photodetectors. (1−5) The key to their success is the remarkable defect tolerance and excellent photophysical properties including high absorption coefficients, tunable bandgaps, and long carrier lifetimes.

Conflict of Interests The authors declare no conflict of interest. Supporting Information Filename Description anie202515506-sup-0001-SuppMat.pdf3 MB Supporting Information References 1, , , , , , , , , , , Science 2021, 371, 1129–1133. 2, , , , , , , , , , , , , , , , , , , Nature 2024, 631, 307–312. 3, , , Chem. Soc. Rev. 2020, 49, 1331–1343. 4, , , , , , , , Nat. Photonics 2022, 17, 171–178. 5, , , , , , , , , J. Am. Chem. Soc. 2024, 146, 14157–14165. 6, , , , , , , Angew. Chem. Int. Ed. 2018, 57, 2889–2893.