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Surface Functionalization of Black Phosphorus with a Highly Reducing Organoruthenium Complex: Interface Properties and Enhanced Photoresponsivity of Photodetectors.
Chemistry ; 2020 Jan 09.
Artigo em Inglês | MEDLINE | ID: mdl-31917501
ABSTRACT
Here we report a heterostructure obtained by vacuum evaporation of a strong molecular n-dopant, [RuCp*(mes)]2, onto black phosphorus (BP) and the systematic investigation of the interfacial structure and properties by various in-situ characterization techniques. Ultraviolet photoelectron spectra (UPS) showed a large decrease in the work function of BP and a new peak within the bandgap, which is attributed to electron transfer from dopants to the underlying BP. The electrons trapped at the interface act as hole traps and induce photogating effect so that a photodetector based on BP-organoruthenium complex heterostructure demonstrates a photoresponsivity of 5.5 mA W-1 and an EQE of 1.3% at 515 nm, a tenfold improvement compared to the pristine BP device.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Assunto da revista: Química Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: Singapura