Berlin 2024 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: Poster III
CPP 28.16: Poster
Wednesday, March 20, 2024, 11:30–13:30, Poster C
Printed n-type PbS Quantum Dot ink towards solar cells — •Mrinalini Chatterjee1, Huaying Zhong1, and Peter Müller-Buschbaum1,2 — 1TUM School of Natural Sciences, Chair of Functional Materials, 85748 Garching, Germany — 2TUM, MLZ, 85748 Garching, Germany
Colloidal Quantum dots (CQDs) have received growing attention in the past decades to produce next generation photovoltaic devices. The quantum confinement effect and size tunability of QDs have enabled customization of their electronic properties, leading to prospective increase in photo-conversion efficiency. Moreover, the solution processibility of QDs has facilitated the single step ink deposition, presenting a more efficient alternative to the conventional layer-by-layer spin-coating method. Despite this, a key challenge remains in realizing high quality, stable ink for active layer deposition for upscaling.
This work focuses on transitioning from conventional spin coating to scalable techniques (slot-die coating) for improved control of film morphology and thickness. To overcome challenges associated with the conventional solvent, Butylamine (BTA), we investigate the effect of alternative solvents including Propylene Carbonate (PC) and Formamide (FA) for the CQD ink, thus optimizing its stability. To do so, characterization techniques such as Fourier transform infrared spectroscopy (FTIR), X ray diffraction (XRD) are used for the chemical and structural analysis. Optical and morphological properties are studied by UV-vis spectroscopy, Scanning electron microscopy (SEM) respectively.
Keywords: Quantum Dots; Lead Sulfide; solar cells; slot die coating; scalable