Single-Source Vapor Deposition of Quantum-Cutting Yb :CsPb ...
grinding of ionic precursors using an electronic ball mill (top) and by manually grinding for 1 hr using a mortar and pestle (bottom). Reference indices are for CsPbCl 3 (blue), Cs 4PbCl 6 (green), and PbCl 2 (red). The ball-milled sample references to CsPbCl 3, but the manually ground sample shows additional peaks associated with residual PbCl
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