@article{Adler:10.26434/chemrxiv.14629437,
author = {Adler, C and Selim, S and Krivtsov, I and Li, C and Mitoraj, D and Dietzek, B and Durrant, JR and Beranek, R},
doi = {10.26434/chemrxiv.14629437},
title = {Photodoping and Fast Charge Extraction in Ionic Carbon Nitride Photoanodes},
url = {http://dx.doi.org/10.26434/chemrxiv.14629437},
}

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TY  - JOUR
AB  - <jats:p><p>Ionic carbon nitrides based on poly(heptazineimides) (PHI) represent a vigorously studied class of materials with possibleapplications in photocatalysis and energy storage. Herein, we study, for thefirst time, the photogenerated charge dynamics in highly stable and binder-freePHI photoanodes using <i>in operando</i> transientphotocurrents and spectroelectrochemical photoinduced absorption measurements.We discover that light-induced accumulation of long-lived trapped electronswithin the PHI film leads to effective photodoping of the PHI film, resultingin a significant improvement of photocurrent response due to more efficientelectron transport. Whilephotodoping has been previously reported for various semiconductors,it has never been shown before for carbon nitride materials. Furthermore, we find that the extraction kinetics ofuntrapped electrons are remarkably fast in these PHI photoanodes, with electronextraction times (ms) comparableto those measured for commonly employed metal oxide semiconductors. These results shed lighton the excellent performance of PHI photoanodes in alcohol photoreforming,including very negative photocurrent onset, outstanding fill factor, and thepossibility to operate under zero-bias conditions. More generally, the herereported photodoping effect and fast electron extraction in PHI photoanodes establisha strong rationale for the use of PHI films in various applications, such asbias-free photoelectrochemistry or photobatteries.<br></p></jats:p>
AU  - Adler,C
AU  - Selim,S
AU  - Krivtsov,I
AU  - Li,C
AU  - Mitoraj,D
AU  - Dietzek,B
AU  - Durrant,JR
AU  - Beranek,R
DO  - 10.26434/chemrxiv.14629437
TI  - Photodoping and Fast Charge Extraction in Ionic Carbon Nitride Photoanodes
UR  - http://dx.doi.org/10.26434/chemrxiv.14629437
ER  - 

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