Issue

Vol. 17 (2025)

Structural Mechanisms of Quasi-2D Perovskites for Next-Generation Photovoltaics

https://doi.org/10.1007/s40820-024-01609-9
Hyeonseok Lee
Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea
Taeho Moon
Department of Materials Science and Engineering, Dankook University, Cheonan 31116, Republic of Korea
Younghyun Lee
Center for Semiconductor Technology, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
Jinhyun Kim
Department of Chemistry, Kwangwoon University, Seoul 01897, Republic of Korea

Corresponding Author: Jinhyun Kim

kim767@kw.ac.kr

Nano-Micro Letters, Vol. 17 (2025), Article Number: 139

Abstract

Quasi-two-dimensional (2D) perovskite embodies characteristics of both three-dimensional (3D) and 2D perovskites, achieving the superior external environment stability structure of 2D perovskites alongside the high efficiency of 3D perovskites. This effect is realized through critical structural modifications in device fabrication. Typically, perovskites have an octahedral structure, generally ABX3, where an organic ammonium cation (A') participates in forming the perovskite structure, with A'(n) (n = 1 or 2) sandwiched between A(n-1)B(n)X(3n+1) perovskite layers. Depending on whether A' is a monovalent or divalent cation, 2D perovskites are classified into Ruddlesden-Popper perovskite or Dion-Jacobson perovskite, each generating different structures. Although each structure achieves similar effects, they incorporate distinct mechanisms in their formation. And according to these different structures, various properties appear, and additive and optimizing methods to increase the efficiency of 3D perovskites also exist in 2D perovskites. In this review, scientific understanding and engineering perspectives of the quasi-2D perovskite is investigated, and the optimal structure quasi-2D and the device optimization is also discussed to provide the insight in the field.


Highlights:
1 This review highlights the structural advantages and challenges of qausi-2D perovskite.
2 Beyond these structural adaptations, unique additive methods specific to quasi-2D perovskites are suggested, alongside future directions for further improvement.
3 Material and device analysis using Ruddlesden–Popper, Dion–Jacobson, and alternating cation phases are discussed.

Keywords

Perovskite Dion-Jacobson Ruddlesden-Popper Quantum structure Quasi-2D perovskite
Lee, Hyeonseok, Taeho Moon, Younghyun Lee, and Jinhyun Kim. 2025. “Structural Mechanisms of Quasi-2D Perovskites for Next-Generation Photovoltaics”. Nano-Micro Letters 17 (February):139. https://doi.org/10.1007/s40820-024-01609-9.
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