Diverse Application of MoO3 for High Performance Organic Photovoltaics: Fundamentals, Processes and Optimization Strategies
The development of efficient and stable interface materials is an important part of the research in organic photovoltaics (OPVs), which aims to realize higher efficiency, longer lifetime, lower cost, easier fabrication, and wider applicability. MoO3 exhibits suitable work function, adjustable electronic structure, favorable ohmic contact with organic materials, remarkable stability in the presence of water and oxygen, and excellent solution processing properties, making it an ideal anode buffer layer (ABL) for OPVs. This review analyzes the photoelectric characteristics of MoO3 based on the crystalline structure and its fundamentals as ABL in OPVs. To simplify the fabrication procedure, AHM, MoO2(acac)2, and MoO3 powder are used as precursors for solution processing MoO3 buffer layer, the attempts are still ongoing. Strategies of composite/hybrid, modification and doping are utilized to optimize the MoO3 ABL to obtain more efficient and stable OPVs. Combining the optical and electronic properties of MoO3, diverse applications are introduced in inverted, semi-transparent devices and tandem architectures, show the wide applicability of MoO3 in OPVs. This review draws the outline of the relationships between the composition, structure and processing method of MoO3 and device performance, and further studies for fully understand it from a deeper level are extremely needed, which is beneficial to improve the performance of OPVs and the research for solar cells with similar structure, such as perovskite solar cells.
- This article is part of the themed collection: Recent Review Articles