A one-step synthesis of cadmium selenide quantum dots from a novel single source precursor

Abstract

A new approach to the one-step synthesis of cadmium selenide (CdSe) quantum dots is reported using the air stable complex cadmium imino-bis(diisopropylphosphine selenide); the ligand is readily prepared from elemental selenium and the precursor, quantum dots of comparable quality to those prepared by conventional methods are obtained.

Experimental and Theoretical Investigations of the Contact Ion Pairs Formed by Reactions of the Anions [(EPR2)2N]− (R = iPr, tBu; E = S, Se) with the Cations [(TePR2)2N]+ (R = iPr, tBu)

“…The primary focus has been the coordination chemistry of these bidentate ligands, and several reviews that provide details of the complexes of 1 with a diverse array of main group, lanthanide and transition metals have been published. [3][4][5] A significant recent application of these complexes, particularly in the case of the selenium derivative (1, E = Se, R = i Pr), has been as single-source precursors for the generation of metal selenides in the form of semiconducting thin films [6][7][8][9][10][11][12][13][14][15][16][17] or quantum dots 18 via CVD or solvothermal processes.…”

Experimental and Theoretical Investigations of Structural Isomers of Dichalcogenoimidodiphosphinate Dimers: Dichalcogenides or Spirocyclic Contact Ion Pairs?

“…In addition, the ligands 1 have tunable electronic properties due to the variability of the substituents on the phosphorus atoms. Metal complexes of 1 (E = Se, R = iPr) have recently been investigated as single-source precursors to semiconducting thin films of binary main-group metal selenides [2] and CdSe quantum dots [3] by the group of O'Brien. As well, ligands of the type 1 have been used to synthesize structurally rare square-planar complexes of Sn II and Se II .…”

New Insights into the Chemistry of Imidodiphosphinates from Investigations of Tellurium-Centered Systems

“…3 The solvothermal generation of CdSe quantum dots has also been accomplished. 4 In addition to the synthetic challenge of making analogous Te-containing ligands that might display novel chemistry, the prospect of generating novel single-source precursors to metal tellurides excited our interest in this field.…”