Banca de DEFESA: FERNANDO TAKASHI DA ROCHA ARITA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : FERNANDO TAKASHI DA ROCHA ARITA
DATA : 14/12/2020
HORA: 14:00
LOCAL: Santo André
TÍTULO:

Antimony sulfide thin films: deposition by rapid thermal evaporation and solar cell simulation

PÁGINAS: 75
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Cerâmicos
RESUMO:

Chalcogenide based photovoltaic devices are widely studied and antimony sulfide has stood out as a promising candidate due to its properties, being the focus of this study. Depositions were performed by rapid thermal evaporation on different substrates and varying some deposition conditions. Initially, the deposition of films in regions of low supersaturation was evaluated; however, the deposited films did not present good crystallinity nor control of stoichiometry. As a result, depositions were carried out in regions with high supersaturation, varying the temperature adjusted in the section containing the substrates. Adjusting to 20°C, it was found, with the aid of X ray diffraction, that the films were deposited preferentially along the planes (211). When the temperature was raised to 240°C, the films were preferably deposited along the (120) (130) planes. Finally, the films showed peaks related to antimony oxide when the temperature was raised to 420°C, indicating loss of sulfur. In addition, an influence of the type of substrate on the growth mode of antimony sulfide films was verified. This work also carried out a study of the photovoltaic device using the SCAPS software. It was found that the most common configuration for this material presents saturation of its current density (roll-over). Hole transporting layers were simulated to reduce this effect. It was found that a thin layer of Cu2O was able to suppress this effect and even maximized the properties of the final device. In addition, the use of compounds from the Sb-S-Se system as the active layer was simulated, of which maximum conversion efficiency was observed in the composition of 0.8 Se content. Trends observed in this simulation are similar to those presented in experimental devices.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1552290 - ANDRE SANTAROSA FERLAUTO
Membro Titular - Examinador(a) Interno ao Programa - 1671688 - ANDRE SARTO POLO
Membro Titular - Examinador(a) Externo à Instituição - LÍDIA CARVALHO GOMES - UNESP
Membro Suplente - Examinador(a) Externo ao Programa - 1305186 - SERGIO BROCHSZTAIN