Fe₂O₃/BiOI-Based Photoanode with n-p Heterogeneous Structure for Photoelectric Conversion

We report a promising photoanode material of Fe 2 O 3 /BiOI for efficient photoelectric conversion in solar cells, which was fabricated with BiOI attached to a one-dimensional Fe 2 O 3 nanorod array. The two semiconductors of p-type BiOI and n-type Fe 2 O 3 formed a heterogeneous structure for efficient charge separation. The highest open circuit voltage and short circuit current of the solar cell can reach 0.41 V and 4.89 mA/cm 2, respectively. This study opens an available field to develop low-cost and environmentally friendly photoelectric materials for solar cells.