Abstract
GaN nanowires typically exhibit high electron mobility and excellent chemical stability. However, stability of GaN is detrimental for successful attachment of dye molecules and its application in dye-sensitized solar cells (DSSCs). Here we demonstrate DSSCs based on GaN/gallium oxide and GaN/TiO x core-shell structures, and we show that coating of GaN nanowires with a TiO x shell significantly increases dye adsorption and consequently photovoltaic performance. The best cells exhibited short circuit current density of 1.83 mA/cm2 and power conversion efficiency of 0.44% under AM 1.5 simulated solar illumination.
| Original language | English |
|---|---|
| Pages (from-to) | 15-19 |
| Number of pages | 5 |
| Journal | Applied Physics A: Materials Science and Processing |
| Volume | 100 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jul 2010 |
| Externally published | Yes |