Optimization of Key Parameters Towards High Performance Perovskite Solar Cells

Elattar, A.M., Khabiri, G., Khalil, A.S., Saber, M.R., Ghannam, R. , Ammar, A.M. and Khalil, M.M.H. (2020) Optimization of Key Parameters Towards High Performance Perovskite Solar Cells. In: 2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Glasgow, Scotland, 23-25 Nov 2020, ISBN 9781728160450 (doi: 10.1109/ICECS49266.2020.9294855)

Abstract

Here, we report important findings regarding underestimated parameters for the synthesis and fabrication of high-performance perovskite solar cells. These parameters include the effect of Fluorine-doped Tin Oxide (FTO) etching, FTO cleaning, the number of compact TiO 2 (c-TiO 2 ) layer, the number of mesoporous TiO 2 (m-TiO 2 ) layers and the aging time before Ag deposition. Our results demonstrated that etching of FTO substrate with Zn/HCl is an essential step and has a major effect on the solar cell's open circuit voltage (Voc), fill factor (FF) and power conversion efficiency (PCE). Furthermore, we demonstrate new and improved protocols for the complete cleaning of FTO substrates. Despite the use of sonication and plasma etching in previous cleaning techniques, SEM images clearly show black clouds in the samples, which may be due to residual Zn particles in the FTO grooves. Thus, a soft toothbrush was used with detergent before sonication to detach the remaining Zn particles. In addition, the optimum number of spin coated layers of compact and mesoporous TiO 2 precursors was investigated. We found that one mesoporous and two compact TiO 2 layers were required to obtain a homogenous pinhole-free compact layer. Consequently, we demonstrate that using these optimized device fabrication procedures, a high efficiency of 17.96% for 6 mol% Co 3+ -doped TiO 2 solar cells can be obtained in comparison to 16.98% for pristine TiO 2 -based cells. Such cells are particularly important for wearable applications that require a small area and a high energy.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ghannam, Professor Rami
• Authors: Elattar, A.M., Khabiri, G., Khalil, A.S., Saber, M.R., Ghannam, R., Ammar, A.M., and Khalil, M.M.H.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISBN: 9781728160450
• Copyright Holders: Copyright © 2020 IEEE
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher

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