Layered 2D Halide Perovskites beyond the Ruddlesden–Popper Phase: Tailored Interlayer Chemistries for High‐Performance Solar Cells. Issue 10 (4th January 2022)

• Record Type: Journal Article
• Authors: Gong, Jue; Hao, Mingwei; Zhang, Yalan; Liu, Mingzhen; Zhou, Yuanyuan
• Is Part Of: Angewandte Chemie international edition. Volume 61:Issue 10(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-04
• Subjects: alternating cation in interlayer phases -- Dion–Jacobson phases -- Ruddlesden–Popper phases -- perovskites -- solar cells; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202112022
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Layered halide perovskites (LHPs) with crystallographically 2D structures have gained increasing interest for photovoltaic applications due to their superior chemical stability and intriguing anisotropic properties, which are in contrast to their conventional 3D perovskite counterparts. The most frequently studied LHPs are Ruddlesden–Popper (RP) phases, which suffer from a carrier‐transport bottleneck due to the van der Waals gap associated with their intrinsic organic interlayer structures. To address this issue, Dion–Jacobson (DJ) and alternating‐cation‐interlayer (ACI) LHPs have rapidly emerged, which exhibit unique structural and (opto)electronic characteristics that may resemble those of the 3D counterparts owing to the eliminated or reduced van der Waals gap. Improved photophysical properties have been achieved in DJ and ACI LHPs, leading towards better photovoltaic performance. Here we provide a comprehensive discussion on the merits and promises of DJ and ACI LHPs from a chemistry perspective. Then, we review recent progress on the synthesis and tailoring of DJ and ACI LHP crystals and thin films, as well as their optoelectronic properties and photovoltaic performance. Finally, we discuss possible pathways to overcome critical challenges to realize the full potential of DJ and ACI LHPs for high‐performance solar cells and beyond. Abstract : Dion–Jacobson (DJ) and alternating‐cation‐interlayer (ACI) phases are two emerging types of layered 2D halide perovskites with high potential in balanced charge‐transport properties and chemical stability. By tailoring the molecular, thin‐film, and device chemistries, high‐performance solar cells have been demonstrated.