Título: Advanced Energy MaterialsImportada do Authenticus Pesquisar Publicações da Revista

Vol. 5 Nº 24

ISSN: 1614-6832

Editora: Wiley-Blackwell

ISI Web of Knowledge - 55 Citações

ISI Web of Science

Scopus - 1 Citação

INSPEC

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

FOS: Ciências da engenharia e tecnologias > Engenharia química

ID Authenticus: P-00J-ZKM

DOI: 10.1002/aenm.201501537

Resumo (PT):

Abstract (EN): Photoelectrochemical water splitting represents an attractive method of capturing and storing the immense energy of sunlight in the form of hydrogen, a clean chemical fuel. Given the large energetic demand of water electrolysis, and the defined spectrum of photons available from incident sunlight, a two absorber tandem device is required to achieve high efficiencies. The two absorbers should beofdifferentandcomplementary bandgaps, connected in series to achieve the necessary voltage, and arranged in an optical stack configuration to maximize the utilization of sunlight.This latterrequirement demands atop device that is responsive to high-energy photons but also transparent to lower-energy photons, which pass through to illuminate the bottom absorber. Here, cuprous oxide (Cu2O) is employed as a top absorber component, and the factors influencing the balance between transparencyandefficiency towardoperationinatandem configurationare studied. Photocathodes based on Cu2O electrodeposited onto conducting glass substrates treated with thin, discontinuous layers of gold achieve reasonable sub-bandgap transmittance while retaining performances comparable to their opaque counterparts. This new high-performance transparent photo- cathode is demonstrated in tandem with a hybrid perovskite photovoltaic cell, resulting in a full device capable of standalone sunlight-driven water splitting.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 19