| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1488847 | Materials Research Bulletin | 2013 | 5 Pages |
•Ag2S-sensitized TiO2 films show good photoelectric responses in visible-light region.•Frequency-modulated SPV give dynamic information and evidence of Ag2S QDSSCs’ performance.•Frequency-modulated SPV can supply complementary information in the study of Ag2S ODSSCs.
Ag2S quantum-dots-sensitized TiO2 films with different amount of Ag2S were fabricated by a successive ionic layer adsorption and reaction (SILAR) method. The separation and transport of photogenerated charge carriers at different spectral regions were studied by the frequency-modulated surface photovoltage technology. Some novel dynamic information of photogenerated charge carriers in a wide spectral range is found. The results indicate that the rate and direction of separation (diffusion) for photogenerated charge carriers are closely related to the performance of quantum-dots-sensitized solar cells (QDSSCs) based on the Ag2S/TiO2 nano-structure.
Graphical abstractThe changed SPV with chopping frequencies indicate the separation speeds of photogenerated charge carriers in different films.Figure optionsDownload full-size imageDownload as PowerPoint slide
