@Article{Kamimura_jpcc_2017,
  author   = {Kamimura, Jumpei and Bogdanoff, Peter and Abdi, Fatwa F. and L\"ahnemann, Jonas and van de Krol, Roel and Riechert, Henning and Geelhaar, Lutz},
  title    = {Photoelectrochemical Properties of {GaN} Photoanodes with Cobalt Phosphate Catalyst for Solar Water Splitting in Neutral Electrolyte},
  journal  = {J. Phys. Chem. C},
  year     = {2017},
  volume   = {121},
  number   = {23},
  pages    = {12540--12545},
  month    = {May},
  note     = {6 pages},
  abstract = {Cyclic voltammetry measurements are carried out in neutral phosphate-buffered electrolyte using n-type Ga-polar GaN thin-film photoelectrodes with and without cobalt phosphate (Co-Pi) modification. Without Co-Pi, the variation of the photocurrent with the bias potential exhibits a two-step behavior and under chopped illumination spikes occur at low bias potential. Thus in this regime surface recombination is dominant. Co-Pi modification suppresses surface recombination and significantly increases the photocurrent, especially for low bias potentials. At the same time, stability tests reveal that Co-Pi does not protect GaN against photocorrosion. Experiments using H2O2 imply that this photocorrosion is a reductive process and probably related to the presence of charged surface defects.},
  doi      = {10.1021/acs.jpcc.7b02253}
}