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Solution-processed photodetectors from colloidal silicon nano/micro particle composite.
Opt Express ; 18(21): 21622-7, 2010 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-20941060
ABSTRACT
We demonstrate solution-processed photodetectors composed of heavy-metal-free Si nano/micro particle composite. The colloidal Si particles are synthesized by electrochemical etching of Si wafers, followed by ultra-sonication to pulverize the porous surface. With alkyl ligand surface passivation through hydrosilylation reaction, the particles can form a stable colloidal suspension which exhibits bright photoluminescence under ultraviolet excitation and a broadband extinction spectrum due to enhanced scattering from the micro-size particles. The efficiency of the thin film photodetectors has been substantially improved by preventing oxidation of the particles during the etching process.
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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Silício / Coloides / Eletroquímica / Nanocompostos / Nanopartículas Metálicas / Óptica e Fotônica Idioma: Inglês Revista: Opt Express Assunto da revista: Oftalmologia Ano de publicação: 2010 Tipo de documento: Artigo País de afiliação: Estados Unidos