Crystallization Kinetics in 2D Perovskite Solar Cells

• Published in: Advanced energy materials Vol. 10; no. 43
• Main Authors: Xu, Youkui, Wang, Meng, Lei, Yutian, Ci, Zhipeng, Jin, Zhiwen
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01-11-2020
• Subjects: Carrier transport; Crystal structure; Crystallization; crystallization kinetics; Energy conversion efficiency; Ion migration; Kinetics; orientation; Oxygen content; Perovskites; Phase transitions; Photovoltaic cells; Quantum wells; Solar cells; stability; Thermal stability
• ISSN: 1614-6832; 1614-6840
• DOI: 10.1002/aenm.202002558

2D perovskites demonstrate higher moisture stability, oxygen content, thermal stability, and a significantly lower ion migration/phase transition occurrence in comparison to 3D perovskite. These advantages imply huge potential for 2D perovskite in commercial applications in the photovoltaic field. However, the horizontal arrangement of the organic layer severely hinders the transport of carriers, and thus, the power conversion efficiency of 2D perovskite solar cells (PSCs) is significantly lower than that of 3D. Controlling the crystallization orientation to achieve rapid carrier transport can effectively avoid or reduce such adverse effects. Hence, an in‐depth understanding of the formation mechanism and crystallization kinetics of 2D perovskite films is crucial to the development of high‐performing 2D PSCs. This review explores the studies conducted on crystallization kinetics, which is the key issue for 2D perovskite, and discusses their effects on the performance of various types of 2D PSCs to date. The crystal/natural quantum well structures and origin of the stability for 2D perovskite are also summarized. Finally, the remaining challenges in terms of development bottlenecks for 2D PSCs are discussed, alongside the proposal of possible solutions.
In this review, the crystallization kinetics and their effects on the performance of various types of 2D perovskite solar cells (PSCs) up to now are discussed. The crystal/natural quantum well structures and original stability for 2D perovskite are also clearly summarized. Finally, remaining challenges are discussed and possible solutions are proposed in terms of development bottlenecks for 2D PSCs.