摘要
有机分子晶体通过非共价相互作用结合在一起,具有三维长程有序、热力学稳定、缺陷密度低等特点,在有机场效应晶体管、X射线成像、非线性光学、光波导、柔性可穿戴器件和激光器等领域有广阔的应用前景.以往的研究主要是基于有机块状晶体或小尺寸的有机微/纳米晶体,对大尺寸的有机分子晶体研究较少,而实际应用场景往往需要大尺寸的有机分子晶体,如晶体管阵列及电路需要英寸级晶体膜,X射线成像和非线性光学变频需要厘米级晶体.然而,获得高质量大尺寸的有机分子晶体极具挑战,国内外尚未有关于大尺寸有机分子晶体生长与光电性能研究的总结和综述.本文首先介绍了分子晶体的生长机理和生长方法,然后介绍了大尺寸有机分子晶体的材料,接着总结了大尺寸有机分子晶体在长余辉发光、非线性光学、X射线成像、快中子探测、场效应晶体管、光电探测器等光电方面的应用,最后讨论了这一领域存在的挑战并对未来发展进行了展望.
Abstract
Organic molecular crystals,bounded together by non-covalent interactions,are three-dimensional long-range ordering and thermodynamic stable,and have low defect density and show rich prospects for applications in organic field effect transistors(OFETs),X-ray imaging,nonlinear optics,optical waveguides,flexible wearable devices,and lasers.However,previous research is mainly based on organic bulk crystals or small-size crystals,and there is less research on large-size organic molecular crystals while practical application scenarios often require large-size organic molecular crystals,such as transistor arrays and circuits requiring inch-level crystal films,X-ray imaging and nonlinear optical frequency conversion require centimeter-level crystals.However,it is difficult to obtain high-quality large-size organic molecular crystals,and there is no summary and review on the growth and optoelectronic properties of large-size organic molecular crystals at home and abroad.In this review,we first introduce the growth mechanism and growth method of molecular crystals,followed by the materials for growing large-size organic molecular crystals.Then we summarize the applications of large-size organic molecular crystals in optoelectronic aspects,such as long-persistent luminescence,nonlinear optics,X-ray imaging,fast neutron detection,field-effect transistors,and photodetectors.Finally,the challenges in this field are discussed and an outlook on future development is provided.
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维普
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