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Enhanced optical transparency of films formed from sorted metallic or semiconducting single‐walled carbon nanotubes filled with CuCl

2016; Wiley; Volume: 253; Issue: 12 Linguagem: Inglês

10.1002/pssb.201600236

1521-3951

Pavel V. Fedotov, Valentina A. Eremina, A. A. Tonkikh, A. I. Chernov, Е. Д. Образцова,

Graphene research and applications

Metallic and semiconducting fractions of single‐walled carbon nanotubes (SWCNTs) sorted by an aqueous two‐phase extraction technique and integrated into thin films were used to produce CuCl@SWCNT hybrid material via a gas phase filling the nanotubes with CuCl. As a result of doping, the SWCNTs in the hybrid material possess a higher optical transparency than the pristine ones. The hybrid material properties strongly depend on the metallic/semiconducting tube ratio in a pristine material. In this work, with UV‐vis‐NIR optical absorption and Raman techniques we show that upon filling with CuCl the solely metallic nanotubes provide much higher doping efficiency than the solely semiconducting SWCNTs. The CuCl@SWCNT hybrid material based on sorted nanotubes is more competitive as a transparent conductive material for the future photovoltaics. A schematic view of electron transfer between CuCl@s‐SWCNT and CuCl@m‐SWCNT within a bundle of CuCl@SWCNT.