Solution Phase Inorganic Ligand Exchange for Fabrication of Ink Based Quantum Dot Thin Films

Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

IMES11_477

تاریخ نمایه سازی: 7 اسفند 1396

Abstract:

PbS quantum dots are the main part of such cells which absorb the photons, turn it into electron-hole pairs and transferred them to the side electrodes. However, during the application of such structure in air atmosphere, QDs immediately destroyed due to their weak oxidation stability. Surface defects increases the density of nanoparticles surface damages and lead to charge carrier’s recombination, which ultimately reduces the cell s performance. Photoluminescence measurements indicated that solution phase exchange of oleic acid to iodide based ligands improved air exposure oxidation of solid films. FTIR and XRD analyses also confirmed successful ligand exchange process and QDs stability in air. Subsequently, such prepared inks are used to fabricate quantum dot thin films.

Authors

Hossein Beygi

PhD Student in materials science and metallurgical engineering

Seyyed Abdolkarim Sajjadi

Professor in materials science and metallurgical engineering

Abolfazl Babakhani

Associate professor in materials science and metallurgical engineering

Jeff F. Young

Professor in physics