Achieving near-unity photoluminescence quantum yield and high stability in CsPbI3 nanoplatelets by hydroiodic acid-assisted ligand treatment

Perovskite nanoplatelets (NPLs) display excellent photoluminescence (PL) properties and unique shape features, including thickness-dependent bandgap luminescence. However, perovskite NPLs, especially those based on iodides, exhibit poor spectral and phase stability....