Banca de QUALIFICAÇÃO: OLAVO DHYAN DE FARIAS CARDOZO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : OLAVO DHYAN DE FARIAS CARDOZO
DATE: 26/10/2021
LOCAL: Sessão por Videoconferência - Google Meet
TITLE:

OPTIMIZATION OF ZINC OXIDE NANOSTRUCTURES FOR APPLICATION IN THIRD GENERATION PHOTOVOLTAIC CELLS.

KEY WORDS:

Zinc Oxide; Nanoparticle; Solar energy; Spreading; Absorption; Photonic device.

PAGES: 64
BIG AREA: Engenharias
AREA: Engenharia Elétrica
SUMMARY:

This thesis project proposes a new approach in exploring zinc oxide (ZnO) nanoparticles (NPs), aiming to improve the performance of third-generation solar cells, focusing on organic solar cells (OSC) and perovskite solar cells. ZnO nanoparticles dispersed on the top surface of the cell active layer can reduce the device reflection and increase the absorption of solar radiation in the photovoltaic active layer, acting as nano-diffusers and introducing an increase of the light path inside the device (hypothesis). In this thesis project, methodologies for optical and electrical modeling of third-generation photovoltaic cells with the insertion of ZnO NPs on top of the active layer are proposed. Computer simulations, based on the finite element method, will be used to analyze the contribution of ZnO nanodiffusers in improving cell performance. ZnO nanoparticles will be synthesized by a green synthesis route and experimentally characterized. ZnO NPs will be deposited on the top of active medium, by drop casting and spin coating methods, and their optical response will be characterized. Preliminary results show that the use of ZnO NPs (160 nm in diameter) on the top surface of an organic solar cell can reduce the device reflectance by up to 95 % for λ = 530 nm, promoting efficient light coupling in the active layer of the cell and simultaneously increasing the absorbance (26 %) of the device. It was also verified that the contributions of “light trapping” and anti-reflective effect improve photocurrent generation, showing an increase in short-circuit current density in OSC by 27.9%.

BANKING MEMBERS:
Externo à Instituição - LUIS ARTURO GOMEZ MALAGON - UPE
Interno - 2378833 - MARCELO CABRAL CAVALCANTI
Presidente - 2199776 - RENATO EVANGELISTA DE ARAUJO