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Phase-stabilized 2D/3D hetero-bilayers via lattice matching for efficient and stable inverted solar cells

https://doi.org/10.1016/j.joule.2025.101954

Ramakrishnan, Shripathi; Chen, Baitao; Zhang, Xiaoyu; Xie, Yi; Tong, Xiao; Xu, Yuanze; Alphenaar, Anna Niamh; Ruthen, Amar; Babatunde, Adewale Joseph; Zhang, Yugang; et al (June 2025, Joule)

Free, publicly-accessible full text available June 1, 2026
Self-Powered Circularly Polarized Light Detection Enabled by Chiral Two-Dimensional Perovskites with Mixed Chiral–Achiral Organic Cations

https://doi.org/10.1021/acsnano.4c02588

Zhang, Xiaoyu; Xu, Yuanze; Alphenaar, Anna Niamh; Ramakrishnan, Shripathi; Zhang, Yugang; Babatunde, Adewale Joseph; Yu, Qiuming (June 2024, ACS Nano)

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Self-powered photodetectors based on Ruddlesden–Popper 2D hybrid perovskites with carbazole derivatives

https://doi.org/10.1063/5.0179297

Alphenaar, Anna Niamh; Zhang, Xiaoyu; Xu, Yuanze; Ramakrishnan, Shripathi; Zhang, Yugang; Yu, Qiuming (December 2023, Applied Physics Letters)

Recently, carbazole-based organic cations have garnered interest for their potential application in two-dimensional (2D) layered hybrid perovskite solar cells because of their strong hole extraction and transport as well as humidity resistance. However, the potential incorporation of carbazole-based Ruddlesden–Popper 2D hybrid perovskites in photodetectors has been largely unexplored. In this study, we synthesized ammonium 1-(9H-carbazol-9-yl) ethanaminium iodide (CzEAI) and fabricated (CzEA)2PbI4 2D perovskite thin films via varying solvent conditions to control film morphology. We constructed photodiode-type photodetectors with the active layer of (CzEA)2PbI4 2D perovskites and demonstrated a specific detectivity of 6.95 × 1010 Jones at 485 nm illumination without external bias. These results demonstrate the potential of carbazole-based 2D perovskites in a wide range of optoelectronic applications.
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