Fig. 4From: Double-Sided Transparent TiO2 Nanotube/ITO Electrodes for Efficient CdS/CuInS2 Quantum Dot-Sensitized Solar Cells a UV–Vis spectra of the DTTO, CuInS2/DTTO, CdS(n)/CuInS2/DTTO (n = 5, 10, and 15). b Absorption spectrum of the double-sided CdS(5)/DTTO and CdS(5)/CuInS2/DTTO filmsBack to article page