PVP-Assisted Hydrothermal Synthesis of Bi2O2Se Nanosheets for Self-Powered Photodetector

Abstract

Bi2O2Se nanosheets were successfully synthesized via a facile one-step PVP-assisted hydrothermal process for the first time. Corresponding characterizations, such as XRD, XPS, SEM and TEM, were carried out to investigate the formation of the products on the amount of PVP in the reaction system. Results revealed that the single-crystalline Bi2O2Se nanosheets with small mean lateral size of 176.3 nm were obtained when the amount of PVP is 0.75 g. Single-crystalline Bi2O2Se nanosheets self-powered photodetector exhibited excellent photodetection performance, superior to that of self-powered photodetectors based on the products synthesized without PVP and other nanomaterials. Under the illumination of 365 nm ultraviolet light, the rise time, responsivity and detectivity could approach up to 9 ms, 14.24 mA/W and 3.16×108 Jones, respectively. Bi2O2Se devices have high photoresponse even in the visible and near infrared bands due to its suitable band gap. The present work provides a novel preparation route of Bi2O2Se via hydrothermal method and PVP assisted synthesis of Bi2O2Se nanosheets is reported for the first time. Bi2O2Se nanosheets self-powered photodetector exhibited excellent photodetection performance and points out a direction for the evolution of self-powered photodetectors in the in the future.

Mist Chemical Vapor Deposition of Bi13S18I2 for Photoelectrochemical-type Photodetection

“…Compared to the other inorganic materials including the bismuth-based and other well-investigated 2D material-based PEC-type photodetectors, the Bi 13 S 18 I 2 PEC-type photodetector exhibited much superior photodetection performance in terms of responsivity and response time (Table S2). ,− One possibility for the excellent performance might be derived from the high quality, including high purity, continuous surface morphology, and relatively strong adhesion of the films on the substrate, of Bi 13 S 18 I 2 thin films synthesized by mist CVD.…”

Oxygen Vacancies Modified Bi4O5I2 for Sensitive and Stable Photoelectrochemical‐Type Photodetection

“…The photodetection performance for OV-Bi 4 O 5 I 2 PEC-type photodetector was much better than those of other bismuth-based PEC-type photodetectors and comparable to the well-investigated inorganic materials-based PEC-type photodetectors (Figure 4g and Table 1). [3,5,11,[44][45][46][47][48][49][50][51][52][53][54][55][56][57] These results strongly suggested that OV-Bi 4 O 5 I 2 PEC-type photodetector is a promis-ing nanodevice suitable for various applications, like optical imaging, optical communication, and biomedical detection.…”

Review on synthetic approaches and PEC activity performance of bismuth binary and mixed-anion compounds for potential applications in marine engineering

“…Recently, bismuth binary and mixed-anion compounds have been gradually used for the construction of PEC-type photodetectors. 79,147,149,[217][218][219][220][221][222][223][224] The photodetection performance of bismuth binary and mixed-anion compound-based PEC-type photodetectors is summarized in Table 5. Remarkably, these photodetectors demonstrate a performance that is comparable to, and sometimes even superior to, the well-studied compound-based PEC-type photodetectors…”