Self-assembled monolayers (SAMs) offer the advantage of facile interfacial modification, leading to significant improvements in device performance. In this study, we report the design and synthesis of a new series of carboxylic acid-functionalized porphyrin derivatives, namely AC-1, AC-3, and AC-5, and present, for the first time, a strategy to exploit the large π-moiety of porphyrins as a backbone for interfacing the indium tin oxide (ITO) electrode and perovskite active layer in an inverted perovskite solar cell (PSC) configuration. The electron-rich nature of porphyrins facilitates hole transfer and the formation of SAMs, resulting in a dense surface that minimizes defects. Comprehensive spectroscopic and dynamic studies demonstrate that the double-anchored AC-3 and AC-5 enhance SAMs on ITO, passivate the perovskite layer, and function as conduits to facilitate hole transfer, thus significantly boosting the performance of PSCs. The champion inverted PSC employing AC-5 SAM achieves an impressive solar efficiency of 23.19 % with a high fill factor of 84.05 %. This work presents a novel molecular engineering strategy for functionalizing SAMs to tune the energy levels, molecular dipoles, packing orientations to achieve stable and efficient solar performance. Importantly, our comprehensive investigation has unraveled the associated mechanisms, offering valuable insights for future advancements in PSCs.
- Self-Assembled Monolayers of Bi-Functionalized Porphyrins: A Novel Class of Hole-Layer-Coordinating Perovskites and Indium Tin Oxide in Inverted Solar Cells
- Self-Assembled Monolayers of Bi-Functionalized Porphyrins: A Novel Class of Hole-Layer-Coordinating Perovskites and Indium Tin Oxide in Inverted Solar Cells
- Chieh-Ming Hung (Author) - National Taiwan UniversityChi-Lun Mai (Author) - Department of Chemistry , i-Center for Advanced Science and Technology (i-CAST) , Innovation and Development Center of Sustainable Agriculture (IDCSA) , National Chung Hsing UniversityChi-Chi Wu (Author) - National Taiwan UniversityBo-Han Chen (Author) - National Tsing Hua UniversityChih-Hsuan Lu (Author) - Institute of Photonics Technologies , National Tsing Hua UniversityChe-Chun Chu (Author) - National Taiwan UniversityMeng-Chuan Wang (Author) - Department of Chemistry , i-Center for Advanced Science and Technology (i-CAST) , Innovation and Development Center of Sustainable Agriculture (IDCSA) , National Chung Hsing UniversityShang-Da Yang (Author) - Institute of Photonics Technologies , National Tsing Hua UniversityHsieh-Chih Chen (Author) - Fu Jen Catholic UniversityChen-Yu Yeh (Author) - Department of Chemistry , i-Center for Advanced Science and Technology (i-CAST) , Innovation and Development Center of Sustainable Agriculture (IDCSA) , National Chung Hsing UniversityPi-Tai Chou (Author) - National Taiwan University
- © 2023 Wiley-VCH GmbH.
- Journal article
- 10/2023
- Angewandte Chemie - International Edition, Vol.62(40), e202309831
- English