“…The solar cell was configured as FTO/CdS/CuInTe 2 /Au, i.e., an inverted structure, in which electrons and holes diffuse to the FTO electrode and metal electrode, respectively. It was found that CuInTe 2 deposited through the electrolyte with a pH value of 2 was copper rich, leading to a relatively high solar-to-power conversion efficiency, 4.13% [128], whereas CuInTe 2 deposited with the electrolyte, which pH = 4, was however copper poor (or, indium rich) and, consequently, gave rise to somewhat low efficiencies ranging from 3.8% [130] to 4.01% [131].…”