Supersaturation-engineered wafer-scale growth of anisotropic 2D organic crystals for uniform polarimetric sensing
Abstract
Organic single crystals endowed with intrinsic anisotropy hold great promise for the realization of miniaturized, polarization-sensitive photodetectors. However, conventional dip-coating approaches struggle to produce wafer-scale single-crystalline films, as the supersaturation conditions optimized for nucleation invariably conflict with those required for crystal growth, leading to fragmented domains and compromised device performance. Here, we introduce an in situ seeded dip coating (SDC) strategy that overcomes this limitation by engineering supersaturation to temporally decouple nucleation from crystal growth. This enables the scalable production of ultrathin two-dimensional molecular crystal (2DMC) films with exceptional uniformity across wafer dimensions. Organic field-effect transistor arrays fabricated from these 2DMCs exhibit high average charge carrier mobility (14.5 cm 2 V −1 s −1 ) and spatial homogeneity, evidenced by an ultralow mobility coefficient of variation (CV) of 4.5%. These arrays demonstrate robust polarization sensitivity with an average dichroic ratio (DR) of 2.2 and a low DR CV of 8.6%. Capitalizing on this uniformity, we constructed dual-device pixel units capable of full-range 180° polarization angle identification, enabling direct application in polarization-encoded optical encryption. The SDC technique provides a scalable pathway for practical high-performance organic polarization-sensitive optoelectronics.
Article Details
Journal Info
Proceedings of the National Academy of Sciences
National Academy of Sciences
Authors (13)
Xianfeng Shen
Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University
Xianshuo Wu
Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University
Ximeng Yao
Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University
Chunli Ma
State Key Laboratory of Advanced Materials for Intelligent Sensing, Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science & Institute of Molecular Aggregation Science, Tianjin University
Lingjie Sun
State Key Laboratory of Advanced Materials for Intelligent Sensing, Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science & Institute of Molecular Aggregation Science, Tianjin University
Zhaofeng Wang
Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University
Pichao Gao
Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University
Dong Zeng
Department of Pathology, Shanghai Public Health Clinical Center, Fudan University
Wei Deng
Jiansheng Jie
Institute of Functional Nano & Soft Materials, Soochow University
Fangxu Yang
Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University
Rongjin Li
Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University
Wenping Hu