Enhanced Light Emitting in CdTe Type (II)-SWNT Composite Diodes
Abstract
We in this work have studied the effects of single-wall nanotube (SWNT) concentrations with carboxyl acid surface group on the luminance properties of (CdS/ZnS shell/shell Type II) capped CdTe Quantum dots (QDs). Carboxylic acid modified carbon nanotubes (CNTs) were used to interact with water-soluble luminescent mercaptoundecanoic acid-capped Type (II) CdTe QDs. The performance of CdTe type (II) QD  light emitting diodes in luminance has been demonstrated by the improvement of doping carboxylic modified carbon nanotubes. This may be due to the chemical interaction bonding between the carboxylic acid modified CNTs  and the CdTe type( II) QDs. The effects of size of CNT, doping and crystallization of CNT have been investigated. Here we report the effects of doping on current density, luminance and current efficiency. Suitability of  SWNT to improve the performance of LED as against multi-wall nanotude ( MWNT) has been discussed.
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