Preparation of CdSe Quantum Dots via Thermolysis of a Novel Single Source Cd/Se Precursor Derived from Cyclohexeno-1,2,3-selenadiazole

作者：Khanna Pawan K^*; More Priyesh; Shewate Rahul; Beri Rupinder K; Viswanath A Kasi; Singh Vidyanand; Mehta Bodh R

来源：Chemistry Letters, 2009, 38(7): 676-677.

DOI：10.1246/cl.2009.676

Reduction of bis(2-bromocyclohexenyl)diselenide, prepared from cyclohexeno-1,2,3-selenadiazole by the procedure of Meier et al., followed by reaction with cadmium chloride, yielded the novel single source Cd/Se precursor [Cd(SeC6H8Br)(2)], which upon thermolysis in a high boiling reaction medium formed CdSe quantum dots (Q.dots). Powder X-ray diffraction analysis showed them to contain cubic CdSe and TEM indicated the particle size to be < 5 nm. The absorption spectrum of the as-prepared Q.dots had a blue shift of > 200 nm with respect to bulk CdSe and photoluminescence measurements at an excitation energy of 350 nm showed shallow trap band-edge emission.

• 出版日期2009-7-5