Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
Publication date: 11th July 2022
Over the last decade, hybrid metal-halide perovskites have attracted great interest in semiconductor and optoelectronic science community. The combination of easy and cheap synthesis from a solution and excellent optoelectronic properties makes these materials excellent for devices such as solar cells, LEDs, photodetectors, transistors and many more. [1] However, concerning perovskite solar cells (PSCs) for commercial applications, many issues still remain. Most of them are related to the stability of the perovskite layer and the selection of suitable dopant-free charge transport layers compatible with the fabrication of large-area solar modules.
Recently, a new type of hole transport material has emerged that exhibits high performance in combination with simple synthesis methods - organic self-assembling monolayers (SAMs). The application of these materials has led to record inverted PSC efficiencies with improved stability and industry-compatible synthesis. [2] However, the exact mechanisms of charge carrier transport through such monolayers are still unknown. In this work, we attempt to identify the fundamental charge transport properties of SAMs and their effect on PSC performance using ultrafast time-referenced fluorescence spectroscopy in combination with charge carrier extraction by an electric field.
This project has received funding from European Regional Development Fund under grant agreement No 01.2.2-LMT-K-718-03-0048 with the Research Council of Lithuania (LMTLT).
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