Inkjet Printing of Few‐Layer Enriched Black Phosphorus Nanosheets for Electronic Devices

Abstract Black phosphorus (BP) is considered among the promising material for electronic devices. A wide range of studies involving properties, exfoliation, and applications of thin‐layered BP nanosheets (NSs) has been put forward. Along with understanding properties of thin‐layered BP NSs, efforts to enlighten the intrinsic characteristics of the BP film should be also accompanied to extend applications of the material. In this study, a facile and efficient inkjet printing approach is introduced to fabricate patterned BP films. This approach successfully addresses the complexity of the ink formulation and thus enables to pattern the high‐quality BP film at as high a resolution as tens of micrometers. The printed BP pattern provides its intrinsic characteristics including electronic properties, conducting mechanism, and stability, which are essential to advancing the printed BP electronic device. By integrating the printed BP pattern into a diode device, its potential for electronic devices is demonstrated. This inkjet printing technique will facilitate the development of printing patterns of 2D materials in a facile and cost‐effective manner and further boost the research on advanced electronic devices.