Starting materials: BABr (synthesized), CsBr, PbBr2, HBr

Product: Yellow single crystals

Description: (BA)2CsPb2Br7 crystals were synthesized by mixing BABr, CsBr, and PbBr2 into a saturated HBr solution at a molar ratio of 3:1:2. Complete dissolution was achieved by heating to 100°C with constant stirring for ~30 minutes. Upon slowly cooling, at a rate of 20°C/min to room temperature, the crystals precipitated. The crystals were removed by suction filtration and were dried in a vacuum.

Method: Photoluminescence microscopy

Description: PL spectra were recorded in a PL microscope. A Janish Research Company ST-500 microscope cryostat using a Coherent OBIS 375LX laser was used for the measurements.

H. Chen, J. Lin, J. Kang, Q. Kong, D. Lu, J. Kang, M. Lai, L. N. Quan, Z. Lin, J. Jin, L. Wang, M. F. Toney, and P. Yang, Structural and spectral dynamics of single-crystalline Ruddlesden-Popper phase halide perovskite blue light-emitting diodes, Science Advances 6, eaay4045‑eaay4045 (2020). doi: 10.1126/sciadv.aay4045.

Entry added on: June 25, 2020, 1:31 p.m.
Entry added by: Andrew Levin NREL
Last updated on: May 4, 2022, 2:54 p.m.
Last updated by: Rayan C Duke University
Data correctness verified by:

• Rayan C Duke University