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.

Contents

1 Introduction

2 Growth mechanism and method

2.1 Theory of crystal growth

2.2 Growth methods

3 Classical organic molecular materials

3.1 Materials for Bulk single crystals

3.2 Materials for single crystal films

4 Optoelectronic applications

4.1 Long-Persistent Luminescence

4.2 Non-linear optical response

4.3 X-Ray Imaging

4.4 Fast neutron detection

4.5 Ferroelectricity

4.6 Field-Effect Transistors and Circuits

4.7 Photodetectors

5 Conclusion and outlook