erratum semiconducting materials for photoelectrochemical energy conversion kevin sivula and roel van de krol nature reviews materials 1, 15010 (2016) in the originally published version of this article, the values of the band gaps marked in figure 4 for g-c3n4, tmp and pmpdi were incorrect. this has been corrected in both the html and pdf versions. we apologize to the readers for this error.erratum semiconducting materials for photoelectrochemical energy conversion kevin sivula and roel van de krol nature reviews materials 1, 15010 (2016) in the originally published version of this article, the values of the band gaps marked in figure 4 for g-c3n4, tmp and pmpdi were incorrect. this has been corrected in both the html and pdf versions. we apologize to the readers for this error.