Lu C.-HSingh R.KChen T.-YSom SKumar RLu S.AMeena M.L.CHUNG-HSIN LU2022-03-222022-03-22202215661199https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123793421&doi=10.1016%2fj.orgel.2022.106444&partnerID=40&md5=a3b126a77e51832f135dd15040756cf2https://scholars.lib.ntu.edu.tw/handle/123456789/598131Colloidal CH3NH3Pb1-xCdxBr3 perovskite quantum dots (PQDs) have shown potential for the development of new solar cell and light-emitting diodes due to their enhanced optoelectronic properties. Here, we have reported a potential ligand-assisted room temperature rapid synthesis method for partial cation exchange in colloidal CH3NH3Pb1-xCdxBr3 PQDs, where exchange of Pb2+ takes place for various similar cations, which result in doped CH3NH3Pb1-xCdxBr3 maintaining its original PQDs shape and structure. There was lattice contraction was observed into the Cd doped perovskite. A blue shift in optical spectra was observed due to partial Pb2+ exchange in place of Cd2+, however high photoluminescence quantum yields, sharp absorption features, and narrow emission of the original CH3NH3Pb1-xCdxBr3 PQDs remained the nearly same. XPS study confirmed the incorporation of Cd2+ ions in the place of Pb2+. Theoretical analysis was also performed to study the different structural and optical aspects of the doped perovskite samples. Furthermore, a prototype perovskite QDs based white LEDs was fabricated that have a higher color gamut. The current work presents a new possibility to develop stable PQDs with enhancing optoelectronic properties. ? 2022BacklightColor purityLEDsPerovskite Quantum DotsStabilityChelationLead compoundsNanocrystalsPerovskitePerovskite solar cellsPositive ionsSolsEnhanced stabilityLightemitting diodeOptoelectronics propertyPartial cationsPerovskite quantum dotPotential ligandRapid synthesisSynthesis methodSemiconductor quantum dots[SDGs]SDG7journal article10.1016/j.orgel.2022.1064442-s2.0-85123793421