عنوان

Perovskit fotoışımasının plazmonik artırımı

TLpq2522826881

انگلیسی

Perovskit fotoışımasının plazmonik artırımı

[Thesis]

Tan, Metin

Sarı, Emre

Izmir Institute of Technology (Turkey)

2020

68

Master's

Izmir Institute of Technology (Turkey)

2020

Recently emerged perovskite materials show superior features like high efficiency, defect tolerance, facile synthesis, bandgap tunability and wide color gamut over their rivals in photonics applications. On the other hand, metals have interesting characteristics as they go smaller in size. Their absorption and scattering properties are completely different as nanoparticles. Their confined electron oscillations bring peculiar consequences. Due to change in these features, metallic nanoparticles can enhance or quench fields around them. Light-matter interactions determine how we see the world. Understanding quantum nature of light and matter and their interactions can benefit higher efficiencies and can open paths for novel technologies. In accordance with this purpose, this thesis study involves synthesis of cesium lead halide perovskite emitters and investigation of their interactions with silver nanoisland films. It was concluded that direct contact between perovskite layer and nanoislands results in a fluorescence quenching where intensity average lifetime decreases below 1 ns. Separating these layers with an alumina dielectric layer increased photoluminescence intensity after 15 nm and the highest intensity was observed at 18 nm thickness with 78% of PL enhancement. With different spacer thickness values, we achieved to see the change in photoluminescence intensity.

Glass substrates

Investigations

Metals

Nanoparticles

Plasma

Silicon

Sarı, Emre

Tan, Metin

p

[Thesis]

276903

a

Y