Monolayer of silica nanospheres assembled onto ITO-coated glass substrates by spin-coating

T A Faraco; N A Yoshioka; R M Sábio; H da S Barud; I O Maciel; W G Quirino; B Fragneaud; A M de Aguiar; S J L Ribeiro; M Cremona; C Legnani

doi:10.1088/1361-6528/abe4fd

Monolayer of silica nanospheres assembled onto ITO-coated glass substrates by spin-coating

Nanotechnology. 2021 May 14;32(20):205603. doi: 10.1088/1361-6528/abe4fd.

Authors

T A Faraco^{1

2}, N A Yoshioka¹, R M Sábio³, H da S Barud⁴, I O Maciel¹, W G Quirino¹, B Fragneaud¹, A M de Aguiar⁵, S J L Ribeiro⁶, M Cremona², C Legnani^{1

6}

Affiliations

¹ Grupo de Nanociência e Nanotecnologia (NANO), Departamento de Física, Universidade Federal de Juiz de Fora (UFJF), Juiz de Fora, MG, 36036-330, Brasil.
² Laboratório de Optoeletrônica Molecular (LOEM), Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, 22453-970, Brasil.
³ Faculdade de Ciências Farmacêuticas, Universidade Estatual Paulista Júlio de Mesquita Filho (UNESP), Araraquara, SP, 14800-903, Brasil.
⁴ Laboratório de Biopolímeros e Biomateriais (BIOPOLMAT), Departamento de Biotecnologia, Universidade de Araraquara (UNIARA), Araraquara, SP, 14801-340, Brasil.
⁵ Departamento de Física, Universidade Federal de Juiz de Fora (UFJF), Juiz de Fora, MG, 36036-330, Brasil.
⁶ Institudo de Química, Universidade Estatual Paulista Júlio de Mesquita Filho (UNESP), Araraquara, SP, 14801-970, Brasil.

PMID: 33567416
DOI: 10.1088/1361-6528/abe4fd

Abstract

In this work, we synthesized colloidal silica nanospheres with an average size of 400 nm through the modified Stöber method and successfully fabricated an ordered close-packed silica nanosphere monolayer onto ITO-coated glass substrates using a three-step spin-coating method. ITO films showed resistivity comparable to that of commercial ITO and the silica nanosphere monolayer-coated ITO/glass substrate exhibited good optical transmittance in the visible (550 nm) and near-infrared (900 nm) regions of 62% and 82%, respectively. The results suggest that this monolayer can be used in optoelectronic devices to enhance efficiency in photovoltaic cells.