Multidentate ligand passivation enabled enhanced photoluminescence and stability of CsPbBr3 nanocrystals for white light-emitting diodes

In situpassivation of Pb0traps by fluoride acid-based ionic liquids enables enhanced emission and stability of CsPbBr3nanocrystals for efficient white light-emitting diodes

“…The Commission Internationale de L'Eclairage (CIE) coordinate of device is (0.318, 0.338) with a high luminous efficacy (LE) of 100.07 lm W −1 , which is much higher than those of the most reported perovskite-based white LEDs (Table 1). 40,[70][71][72][73][74][75][76][77] The device exhibits a wide color gamut, in which the selected CIE coordinates for blue, green, and red monochromatic light encompass 140.64% of the National Television System Committee (NTSC) standard (Fig. 8b), demonstrating the excellent backlight performance.…”

Biomolecules incorporated in halide perovskite nanocrystals: synthesis, optical properties, and applications

“…3b). 84 They report dramatically improved colloidal stability, high thermal resistance, structural stability, and photostability upon continuous illumination relative to as-synthesized HPNCs (see Table 1). However, the HPNCs were produced using 4,4-aminobis(cyanoaminovaleric acid) (CA) and OAm, and the authors previously report CA-capped HPNCs to have significantly improved long-term optical properties relative to OA-capped HPNCs.…”

Polymerizable Surfactant Ligand for Stabilization and Film Formation of CsPbBr3 Nanocrystals

“…Most of them were small molecular bi/multidentate ligands, for example, a bidentate ligand 2,2′-iminodibenzoic acid, 16 a multidentate ligand carbamimidothioic acid, 17 ethylenediaminetetraacetic acid (EDTA) and glutathione (GSH), 18,19 and glutamic acid. 20 Polymers that carried multi-coordinating or anchoring groups were also used as ligands for surface coating and enhancing colloidal and photophysical stability of perovskite NCs, for example, poly(isobutylene-alt-maleic anhydride), 21 polyethylenimine (PEI), 22 and poly(maleic anhydride-alt-1-octadecene) modified with 2-aminoethyl methacrylate hydrochloride. 23 Because perovskite NCs are often used in two-dimensional devices or polymer composite films, their stability in the film state is also of concern.…”

“…Because ligands are important for all inorganic perovskite NCs to retain their high performances, various ligands other than OA/OAm have been investigated in the literature. Most of them were small molecular bi/multidentate ligands, for example, a bidentate ligand 2,2′-iminodibenzoic acid, a multidentate ligand carbamimidothioic acid, ethylenediaminetetraacetic acid (EDTA) and glutathione (GSH), , and glutamic acid . Polymers that carried multi-coordinating or anchoring groups were also used as ligands for surface coating and enhancing colloidal and photophysical stability of perovskite NCs, for example, poly­(isobutylene- alt -maleic anhydride), polyethylenimine (PEI), and poly­(maleic anhydride- alt -1-octadecene) modified with 2-aminoethyl methacrylate hydrochloride …”