Cube-like anatase TiO2 mesocrystals as effective electron-transporting materials toward high-performance perovskite solar cells

• Published in: Journal of colloid and interface science Vol. 635; pp. 535 - 542
• Main Authors: Shen, Deli, Lan, Tongbin, Zhang, Houan, Li, Weizhou, Xiong, Peixun, Li, Yafeng, Wei, Mingdeng
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.04.2023
• Subjects: Electron-transporting material; Perovskite solar cells; Porous nanomaterials; TiO2 mesocrystals; TiO2 mesocrystals; Porous nanomaterials; Electron-transporting material; Perovskite solar cells
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2022.12.141

The cube-like mesoporous single-crystal anatase TiO2 nanoparticles synthesized by using a facile hydrothermal method were utilized as an efficient electron-transporting material for PSCs and the maximum PCE of 20.05% can be achieved in the ultimate perovskite solar cell. [Display omitted] Electron-transporting materials (ETMs) with higher carrier mobility and a suitable band gap structure play a significant role in determining the photovoltaic performance of perovskite solar cells (PSCs). Herein, cube-like mesoporous single-crystal anatase TiO2 (Meso-TiO2) nanoparticles synthesized by using a facile hydrothermal method were utilized as an efficient ETM for PSCs. The superior semiconducting properties of the Meso-TiO2 based ETM enabled the best power conversion efficiency (PCE) of 20.05% for a PSC. Moreover, the device retained 80% of its initial PCE after being stored in ambient conditions for 20 days under 25 ± 5% relative humidity. In contrast to the commercial TiO2 ETM, the Meso-TiO2 ETM based PSC showed a distinguished interface with better interfacial conditions and improved carrier extraction originating from the cube-like mesoporous single-crystal anatase TiO2 ETM.