| Summary: | 碩士 === 國立中興大學 === 物理學系所 === 98 === In this study, we have successfully used the chemistry bath deposition (CBD) method to synthesize lead sulfide (PbS) quantum dots (QDs) on a titania (TiO2) electrode.
We investigated the dependence of the performance of the solar cells on the CBD parameters such as concentration of the precursor solution, deposition time, and deposition cycle. The best efficiency was obtained for the concentration of 0.01M, deposition time of 5 min, and deposition cycle of 4 times.
The I-/I3- redox was used as the electrolyte. The best efficiency of the solar cells was about 0.27% under AM 1.5 sun. The efficiency could be increased to 0.42% as the power of the incidence light was reduced to10% sun.
The absorption and the incident photon-to-current conversion efficiency (IPCE) spectra indicate efficient absorption in the infrared range. The best IPCE was about 37% at 400 nm
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