Thermal
Evaporation and Characterization of Sb<sub>2</sub>Se<sub>3</sub> Thin
Film for Substrate Sb<sub>2</sub>Se<sub>3</sub>/CdS Solar Cells
- Publication date
- Publisher
Abstract
Sb<sub>2</sub>Se<sub>3</sub> is a promising absorber material for
photovoltaic cells because of its optimum band gap, strong optical
absorption, simple phase and composition, and earth-abundant and nontoxic
constituents. However, this material is rarely explored for photovoltaic
application. Here we report Sb<sub>2</sub>Se<sub>3</sub> solar cells
fabricated from thermal evaporation. The rationale to choose thermal
evaporation for Sb<sub>2</sub>Se<sub>3</sub> film deposition was first
discussed, followed by detailed characterization of Sb<sub>2</sub>Se<sub>3</sub> film deposited onto FTO with different substrate temperatures.
We then studied the optical absorption, photosensitivity, and band
position of Sb<sub>2</sub>Se<sub>3</sub> film, and finally a prototype
photovoltaic device FTO/Sb<sub>2</sub>Se<sub>3</sub>/CdS/ZnO/ZnO:Al/Au
was constructed, achieving an encouraging 2.1% solar conversion efficiency