{'fraction_non_alphanumeric': 0.02848575712143928, 'fraction_numerical': 0.0074962518740629685, 'mean_word_length': 5.3619047619047615, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Two-dimensional molecular crystals: a review

Two-dimensional molecular crystals (2DMCs) have characteristics of long-range order, free boundary and low defect density, which make them ideal candidates to build high-performance optoelectronic devices. The low-cost and large-area production of 2DMCs is a key to their applications. At present, many methods have been developed for the controlled preparation of 2DMCs in gas or liquid phases, and the unique optoelectronic properties of 2DMCs have been revealed. In this review, we summarized the preparation methods of 2DMCs and their applications in the devices such as field-effect transistors and phototransistors.