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@article{Daboczi:2026:10.1039/d6el00052e,
author = {Daboczi, M and Al, Lawati N and Stewart, K and Zhi, M and Müller, JS and Kim, J-S and Nelson, J and Eisner, F and Eslava, S},
doi = {10.1039/d6el00052e},
journal = {EES Solar},
title = {PTQ10:L8-BO organic photoactive layers enable improved stability for solar water oxidation and enhanced unassisted water splitting.},
url = {http://dx.doi.org/10.1039/d6el00052e},
year = {2026}
}
TY - JOUR
AB - Integrating organic photovoltaics into anodes (IPV-anodes) represents a promising way to exploit the excellent optoelectronic properties of organic polymer: non-fullerene bulk-heterojunctions (BHJ) for solar-to-fuel applications. However, the high voltage losses, poor photochemical stability and high synthetic complexity of the most commonly used polymer: non-fullerene combinations have limited their full potential. Here, we address these limitations by introducing a BHJ comprising the low-synthetic-complexity polymer PTQ10 and the near-infrared absorbing acceptor L8-BO. By integrating this new BHJ with a graphite sheet functionalised with a NiFeOOH catalyst, we achieve a low onset potential of +0.64 VRHE, a photocurrent density of 21 mA cm-2 at +1.23 VRHE and a t 80 operational stability of 22 h under full AM1.5 G illumination (i.e., without using any UV filter) for water oxidation. These values represent a 40 mV increase in photovoltage and a sevenfold improvement in operational stability (t 80 extended from 3 h to 22 h) compared to reference IPV-anodes based on the ternary D18:PM6:L8-BO photoactive blend. Spectroscopic analyses reveal that these improvements stem from the reduced non-radiative voltage losses (from 0.24 V to 0.19 V) and superior photochemical and morphological stability of the PTQ10:L8-BO blend compared to the reference blend. Building on these advances, we demonstrate monolithic tandem IPV-anodes integrating PTQ10:IDIC and PTQ10:L8-BO organic blends to achieve a solar-to-hydrogen efficiency of 6.2%, offering critical insights for boosting the stability and efficiency of integrated solar-to-hydrogen systems working without any external bias.
AU - Daboczi,M
AU - Al,Lawati N
AU - Stewart,K
AU - Zhi,M
AU - Müller,JS
AU - Kim,J-S
AU - Nelson,J
AU - Eisner,F
AU - Eslava,S
DO - 10.1039/d6el00052e
PY - 2026///
TI - PTQ10:L8-BO organic photoactive layers enable improved stability for solar water oxidation and enhanced unassisted water splitting.
T2 - EES Solar
UR - http://dx.doi.org/10.1039/d6el00052e
UR - https://www.ncbi.nlm.nih.gov/pubmed/41909075
ER -
Jenny Nelson
Professor of Physics
1007, Huxley Building
South Kensington, London, SW7 2AZ