Comment on “Facile chemical bath deposition of CuS nano peas like structure as a high efficient counter electrode for quantum-dot-sensitized solar cells” by H.-J. Kim, J.-H. Kim, C. S.S. P. Kumar, D. Punnoose, S.-K. Kim, C.V.V.M. Gopi, S. S. Rao, Journal

A recent paper by H.-J. Kim, J.-H. Kim, C.S.S.P. Kumar, D. Punnoose, S.-K. Kim, C.V.V.M. Gopi, S.S. Rao [1] provides a facile chemical bath deposition of CuS nano peas like structure as a high efficient counter electrode for quantum-dot-sensitized solar cells, but makes an unjustified approximation in the film thickness. Herein, the film thickness was carefully analyzed again based on the original paper.