Pic2 (IMAGE) National Research Council of Science & Technology Caption For the efficient PEC water splitting, it is crucial to balance two factors by systematically controlling the defect density in TiOx passivation layer of n-Si photoanode, which are (1) accessible density of state for carrier transportation in forbidden gap and (2) favorable interface energetics. Credit Korea Research Institute of Standards and Science (KRISS) Usage Restrictions The sources of photos and research results from KRISS must be specified. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.