Spontaneous solar water splitting with decoupling of light | ResearchBunny

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Abstract

This paper presents a novel back-buried junction (BBJ) photoelectrochemical (PEC) cell design that decouples light harvesting and electrocatalysis for efficient solar water splitting. The design achieves >95% front-side light harvesting while electrochemical reactions occur on the back side, minimizing losses. A single silicon BBJ-PEC half-cell produces a current density of 40.51 mA cm⁻² for hydrogen evolution. Three cells connected in series enable unassisted solar water splitting with 15.62% solar-to-hydrogen efficiency and a hydrogen generation rate of 240 µg cm⁻² h⁻¹.

Publisher

Nature Communications

Published On

Aug 06, 2020

Authors

Hui-Chun Fu, Purushothaman Varadhan, Chun-Ho Lin, Jr-Hau He

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