The photoelectrochemical behavior of p-type boron phosphide(BP) in acidic solution was investigated. The p-BP photocathode had a good wavelength response(E_g =2.0 eV) and was suitable in an stulfuric acid solution under irradiation. The gas evolved fr...
The photoelectrochemical behavior of p-type boron phosphide(BP) in acidic solution was investigated. The p-BP photocathode had a good wavelength response(E_g =2.0 eV) and was suitable in an stulfuric acid solution under irradiation. The gas evolved from this BP photocathode under irradiation was hydrogen which was produced with a current efficiency of about 100%. The photocurrent was markedly increased by a suitable surface ruthenium treatment of the BP. A photoelectrochemical cell of the form Pt(H₂)/0.5M H₂SO₄/p-BP was shown to have an the open-circuit photovoltage of 0.45V, the short-circuit photocurrent density of 2.4 mA·㎝^(-2), and the fill factor of 25%.