Coordinating light management and advance metal nitride interlayer enables MAPbI3 solar cells with >21.8% efficiency. (February 2022)

• Record Type: Journal Article
• Authors: Wang, Fengyou; Li, Xin; Du, Jinyue; Duan, Hui; Wang, Haoyan; Gou, Yue; Yang, Lili; Fan, Lin; Yang, Jinghai; Rosei, Federico
• Is Part Of: Nano energy. Volume 92(2022)
• Publication Date: 2022-02
• Subjects: Amorphous titanium nitride -- Interfacial charge transfer -- Electron transport layer -- Perovskite solar cells -- Light-scattering; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2021.106765
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Due to the continuous increase in power conversion efficiencies ( PCEs ), perovskite solar cells (PSCs) are widely considered as the most promising technology for third generation photovoltaics. Improving optical absorption while reducing electrical losses is still a challenge towards attaining PCE values closer to the Shockley-Queisser limit. However, frequently used strategies to improve light absorption (e.g. via texturing the front surface) often cause electrical recombination losses. Here, we successfully relaxed the competing mechanisms between electrical and optical properties by integrating a modulated textured substrate and an amorphous metal nitride interface modification layer to combine enhanced light scattering and reducing interfacial recombination losses in PSCs. This comprehensive electro-optical management presents several advantages, including increased light absorption, promoting bandgap alignment and passivating the underlying perovskite defects. Consequently, the resulting MAPbI3 solar cells exhibit a high open-circuit voltage of 1.17 V and the concomitant high PCE of 21.84%. In addition, we also use numerical simulations to propose approaches towards achieving high efficiency ( PCE >30%) PSCs. Besides expanding the pool of available strategies for improving the efficiency of PSCs, from photon management to interface engineering, our work also offers a systematic guidance for the design and fabrication of high performance photovoltaic devices. Graphical Abstract: ga1 Upgraded PSCs (MST-PSCs) with excellent PCE have been designed and achieved by integrating a surface textured substrate and advance amorphous-metal-nitride interlayer. Approaches to attain > 30% efficiency of PSCs has been explored. Comprehensive insights into the interaction between the light management, interface polarities, and the performance of the device have also been elucidated in detail. Highlights: Upgraded PSCs with advanced IML and light scattering have been proposed. Comprehensive electro-optical management boosts device performance. Approaches towards achieving > 30% efficiency have been proposed. Providing an advanced metal nitride ETL as an alternative for future PSCs.