Current–voltage characteristics, EQE of the solar cell, and optical absorption spectra of SCNT. (a) Current–voltage characteristics of a typical SCNT/n-Si and Au-doped SCNT/n-Si heterojunction device. (b) The external quantum efficiency (EQE) of the solar cell obtained before (black line) and after (red line) Au doping. (c) Optical absorption spectra of SCNT before (black line) and after (red line) doping.
Chen et al. Nanoscale Research Letters 2013 8:225 doi:10.1186/1556-276X-8-225