@article{733df460db1340a8be593c6d44432ff0,
title = "Integrated Solar-Driven Device with a Front Surface Semitransparent Catalysts for Unassisted CO2 Reduction",
abstract = "Monolithic integrated photovoltaic-driven electrochemical (PV-EC) artificial photosynthesis is reported for unassisted CO2 reduction. The PV-EC structures employ triple junction photoelectrodes with a front mounted semitransparent catalyst layer as a photocathode. The catalyst layer is comprised of an array of microscale triangular metallic prisms that redirect incoming light toward open areas of the photoelectrode to reduce shadow losses. Full wave electromagnetic simulations of the prism array (PA) structure guide optimization of geometries and length scales. An integrated device is constructed with Ag catalyst prisms covering 35% of the surface area. The experimental device has close to 80% of the transmittance with a catalytic surface area equivalent 144% of the glass substrate area. Experimentally this photocathode demonstrates a direct solar-to-CO conversion efficiency of 5.9% with 50 h stability. Selective electrodeposition of Cu catalysts onto the surface of the Ag triangular prisms allows CO2 conversion to higher value products enabling demonstration of a solar-to-C2+ product efficiency of 3.1%. This design featuring structures that have a semitransparent catalyst layer on a PV-EC cell is a general solution to light loss by shadowing for front surface mounted metal catalysts, and opens a route for the development of artificial photosynthesis based on this scalable design approach.",
keywords = "artificial photosynthesis, CO RR, front illumination, PV-EC, solar fuels, 22/3 OA procedure",
author = "Cheng, {Wen Hui} and Richter, {Matthias H.} and Ralph M{\"u}ller and Michael Kelzenberg and Sisir Yalamanchili and Jahelka, {Phillip R.} and Perry, {Andrea N.} and Wu, {Pin Chieh} and Rebecca Saive and Frank Dimroth and Brunschwig, {Bruce S.} and Thomas Hannappel and Atwater, {Harry A.}",
note = "Funding Information: The authors acknowledge the support of the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Fuels from Sunlight Hub under Award Number DE‐SC0021266 for the Liquid Sunlight Alliance program. Research was in part carried out at the Molecular Materials Research Center of the Beckman Institute of the California Institute of Technology. TU Ilmenau and FhG‐ISE were supported by the German Federal Ministry of Education and Research in the frame of the project DEPECOR (FKz: 033RC021 D). W.‐H.C. acknowledges the support from Ministry of Science and Technology, Taiwan (2030 Cross‐Generation Young Scholars Program, MOST 110‐2628‐E‐006‐005; MOST 110‐2628‐E‐006‐007, and Ministry of Education (Yushan Fellow Program), Taiwan, and in part from the Higher Education Sprout Project of the Ministry of Education to the Headquarters of University Advancement at National Cheng Kung University (NCKU). P.C.W. acknowledges the support from the Ministry of Science and Technology, Taiwan (MOST 108‐2112‐M‐006‐021‐MY3; 110‐2124‐M‐006‐004), and Ministry of Education (Yushan Fellow Program), Taiwan, and in part from the Higher Education Sprout Project of the Ministry of Education to the Headquarters of University Advancement at National Cheng Kung University (NCKU). Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",
year = "2022",
month = sep,
day = "22",
doi = "10.1002/aenm.202201062",
language = "English",
volume = "12",
journal = "Advanced energy materials",
issn = "1614-6832",
publisher = "Wiley",
number = "36",
}