In the originally published version of the article "Semiconducting materials for photoelectrochemical energy conversion" by Kevin Sivula and Roel van de Krol, the band gap values for p-C6N4, TMP, and PMPDI in Figure 4 were incorrect. This error has been corrected in both the HTML and PDF versions of the article. The authors apologize to the readers for this mistake.In the originally published version of the article "Semiconducting materials for photoelectrochemical energy conversion" by Kevin Sivula and Roel van de Krol, the band gap values for p-C6N4, TMP, and PMPDI in Figure 4 were incorrect. This error has been corrected in both the HTML and PDF versions of the article. The authors apologize to the readers for this mistake.