“…The mentioned structural instability of PNCs stems, to a large extent, from the dynamic and loose binding between their inorganic core and surface organic ligands, , which results in an easy detachment of the latter; water, oxygen, and polar solvents can then be adsorbed by the exposed defect sites, leading to phase transition or degradation of PNCs. ,, At present, various commercially available ligands, such as oleylamine (OLA), oleic acid (OA), dodecylbenzenesulfonic acid, zwitterionic ligands, alkanethiolate, 2,2′-iminodibenzoic acid, trioctylphosphine oxide, , secondary aliphatic amines, l -phenylalanine, and alkylphosphonic acids, have been used to stabilize PNCs. Among them, dodecylbenzenesulfonic acid and zwitterionic ligands have been proven as rather effective ligands to stabilize green-emitting CsPbBr 3 PNCs during post-preparative purification and storage. , However, stabilization of red-emitting CsPbI 3 PNCs still remains a challenging task, due to their intrinsically metastable perovskite structure. − At the same time, CsPbI 3 PNCs possess a narrow band gap and are characterized by a long carrier lifetime, making them promising candidates for applications in red-light-emitting devices and other photonic sources, , solar cells, , and photocatalysis . Thus, offering ligands which would ensure much better protection of CsPbI 3 PNCs is an important step forward toward their practical application .…”