Erratum to: Structural and optical properties of (Zn, Co) co-doped SnO_2 nano particles

摘要

The original version of the article unfortunately contained errors in the equations, miscalculation and changes in figure.The detailed description of the error and corrections are given below. The optical band-gap energy of a semiconductor can be derived from the reflectance spectrum. The reflectance (R) is converted to absorbance (F(R)) using the Kubelka-Munk function, (Formula presented.) The band gap is determined by the (F(R) × E)~2~E curve with the extrapolated line at (F(R) × E)~2= 0, where E is the incident photon energy (hυ). To plot the curve, the data were processed in the origin software, in which Eq. (1) might be displayed as, col(E) = (1 - col(D))~2/(2*col(D)) (2) where col(E) and col(D) are F(R) and R, respectively. However, Eq. (2) was miswritten as, col(E) = (1 - col(D))~2/(2*col(D)) (3) Because of this mistake, the obtain F(R) ~ λ and (F(R) × E)2 ~ E curves are wrong and the thus determined optical band-gap energies are incorrect. Figures 8, 9 and 11 appeared incorrectly in the published version of this article. The corrected figures are shown below. Based on the corrected figure, the optical band-gap energies are found to be 4.00, 3.90, and 3.92 eV for Sn_(0.94)Zn_(0.05)Co_(0.01)O_2, Sn_(0.92)Zn_(0.05)Co_(0.03)O_2, and Sn_(0.90)Zn_(0.05)Co_(0.05)O_2 nanoparticles, respectively. The analyses and conclusion will have to be corrected, accordingly. The details of changes are illustrated in this Erratum, with corrected texts listed as followings.