Chiroπ‐Extended Helitwistacene: Resolving the Planarity–Helicity Dilemma for Broadband Circularly Polarized Light Detection
Abstract
Abstract Achieving broadband and high‐sensitivity circularly polarized light (CPL) detection with intrinsic organic semiconductors remains a fundamental challenge due to the inherent planarity–helicity dilemma: conventional π‐extension strategies broaden absorption but tend to suppress molecular helicity, whereas enhanced helicity through steric modulation often shortens conjugation and limits spectral coverage. Here, we introduce a Chiroπ‐Extension (CπE) design strategy that reconciles this conflict by bay‐fusing two perylene diimides into a π‐extended helitwistacene. This fusion simultaneously elongates the conjugation pathway and enforces near‐collinear alignment of electric and magnetic transition dipoles, resulting in amplified chiroptical activity across the UV–visible region. Single‐crystal devices of ( S )‐di‐ClPDI‐Ph exhibit broadband CPL detection from 365 to 690 nm with an exceptional photocurrent dissymmetry factor of 0.60 at 515 nm, along with high photoresponsivity (9.1 W −1 ) and detectivity (4.8 × 10 12 Jones). This work establishes CπE as a general molecular design principle for intrinsically chiral semiconductors, paving the way toward high‐sensitivity, broadband, and integrable CPL optoelectronic technologies.
Article Details
Authors (10)
Xue Wang
Ke Gao
State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products
Siyuan Zhang
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
Dong Zeng
Department of Pathology, Shanghai Public Health Clinical Center, Fudan University
Wenxuan Chang
State Key Laboratory of Advanced Materials for Intelligent Sensing MOE Key Laboratory of Organic Integrated Circuit & Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry School of Science Tianjin University Tianjin 300072 China
Huile Zhu
State Key Laboratory of Advanced Materials for Intelligent Sensing MOE Key Laboratory of Organic Integrated Circuit & Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry School of Science Tianjin University Tianjin 300072 China
Xiaobo Shang
State Key Laboratory for Porous Metal Materials Shaanxi International Research Center for Soft Matter School of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 P.R. China
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