Effects of Surface Modification of TiO₂ Nanotube Arrays on the Performance of CdS Quantum-Dot-Sensitized Solar Cells

Table 2

Electrochemical parameters of reference and HNO₃-treated solar cells.

Sample	𝑅𝑠 (Ω)	𝑅CT1 (Ω)	𝑅CT2 (Ω)	𝑅𝐸 (Ω)
CdS/TiO2	22.98	3.596	62.45	180.4
CdS/TiO2 (HNO3)	21.85	2.09	37.04	127.1