Research Article

Effect of In Situ Thermal Annealing on Structural, Optical, and Electrical Properties of CdS/CdTe Thin Film Solar Cells Fabricated by Pulsed Laser Deposition

Figure 4

Raman spectra of five samples treated with different iTAP durations at 450°C. Peaks corresponding to the CdTe TO, LO, and 2TO modes as well as a signature peak of can be observed at Raman shifts of 141, 169, 292, and 730 cm−1, respectively.