Spray Pyrolyzed TiO2 Embedded Multi?Layer Front Contact Design for High?Efficiency Perovskite Solar Cells

• 作者: Dietmar Knipp Jean-Michel Nunzi Koji Tomita Masao Isomura Md.Akhtaruzzaman Md.Shahiduzzaman Mohammad Ismail Hossain Satoru Iwamori Sem Visal Shinjiro Umezu Tetsuya Kaneko Tetsuya Taima Wayesh Qarony Yuen Hong Tsang
• 来源期刊: 纳微快报（英文）
• 年，卷（期）: 2021,（2）
• 页码范围: 262-278
• 页数: 17页
• 语种: 英文

摘要

The photovoltaic performance of perovskite solar cells (PSCs) can be improved by utilizing efficient front contact. However, it has always been a significant challenge for fabricating high-quality, scalable, controllable, and cost-effective front contact. This study pro-poses a realistic multi-layer front contact design to realize efficient single-junction PSCs and perovskite/perovskite tandem solar cells (TSCs). As a critical part of the front contact, we prepared a highly compact titanium oxide (TiO2) film by industrially viable Spray Pyroly-sis Deposition (SPD), which acts as a potential electron transport layer (ETL) for the fabrication of PSCs. Optimization and reproducibility of the TiO2 ETL were discreetly investigated while fabricating a set of planar PSCs. As the front contact has a significant influence on the optoelectronic properties of PSCs, hence, we investigated the optics and electrical effects of PSCs by three-dimensional (3D) finite-difference time-domain (FDTD) and finite element method (FEM) rigorous simulations. The investigation allows us to compare experimental results with the outcome from simulations. Furthermore, an optimized single-junction PSC is designed to enhance the energy conversion efficiency (ECE) by > 30％ compared to the planar reference PSC. Finally, the study has been progressed to the realization of all-perovskite TSC that can reach the ECE, exceeding 30％. Detailed guidance for the completion of high-performance PSCs is provided.