Efficient Dye-Sensitized Solar Cells Based on the Combination of ZnO Nanorods and Microflowers

Autor(es)

Goncalves, Agnaldo de Souza ^[1] ; Davolos, Marian R. ^[2] ; Nogueira, Ana Flavia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas UNICAMP, Inst Quim, Dept Quim Inorgan, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Paulista UNESP, Inst Quim, Dept Quim Geral & Inorgan, BR-14801970 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Nanoscience and Nanotechnology; v. 10, n. 10, p. 6432-6438, OCT 2010.
• Citações Web of Science: 6

Resumo

Well-aligned ZnO nanorod films were grown onto transparent conducting substrates by using an aqueous solution route. The presence of some reflections in the X-ray diffraction pattern of the ZnO films indicates the vertical alignment of the nanorods along the c axis of the wurtzite hexagonal structure. Well-aligned ZnO nanorods were observed by scanning electron microscopy. The presence of top ZnO microflower layers over the ZnO nanorod film was observed for all growth times studied. The ZnO nanorods with ZnO microflower top layers were applied as photoelectrodes in dye-sensitized solar cells. Higher photocurrent densities and photovoltages were observed with longer nanorod growth times. The high performance of the dye-sensitized solar cells might be associated to the combination of ZnO nanorods and microflowers in the same photoelectrode. (AU)

• Processo FAPESP: 08/51001-9 - Células solares híbridas e fotoeletroquímicas baseadas em nanopartículas e nanorods de ZnO e ZnO:Ga
• Beneficiário: Agnaldo de Souza Gonçalves
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado