Zhou Junxin, Gao Qiyue, Zhang Yuan, Shao Zhitao, Zhang Nana, Qin Yuyang, Feng Wei
College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China.
School of Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu 215500, China.
ACS Appl Mater Interfaces. 2024 Dec 25;16(51):70694-70700. doi: 10.1021/acsami.4c17080. Epub 2024 Dec 10.
Photoelectrochemical photodetectors (PEC PDs) are promising in underwater optoelectronic devices because of their low cost, good sensitivity, and self-powered characteristics. However, achieving high-performance omnidirectional visible PEC PDs using seawater as the electrolyte is still challenging, hindering their practical application. This work successfully synthesized CuO nanobelt arrays (NAs) on a linear copper wire via a low-temperature solution method with an annealing process. The self-powered CuO NA PEC PDs exhibit good UV-vis-NIR photoresponse ranging from 365 to 850 nm with a high responsivity of -83.18 mA/W (455 nm irradiation), a fast response time of 28/140 ms, and good stability in simulated seawater. The high responsivity surpasses all of the reported PEC PDs when seawater or simulated seawater is used as the electrolyte. In addition, the CuO NA PEC PDs show good 360° omnidirectional photodetection and underwater wireless optical communication capabilities. This work provides new insights into achieving omnidirectional visible PEC PDs and demonstrates the potential application of CuO NAs in underwater optoelectronic devices.
光电化学光电探测器（PEC PDs）因其低成本、高灵敏度和自供电特性，在水下光电器件领域具有广阔前景。然而，以海水作为电解质来制备高性能全向可见光PEC PDs仍然具有挑战性，这阻碍了它们的实际应用。本工作通过低温溶液法结合退火工艺，成功在线性铜线上合成了氧化铜纳米带阵列（NAs）。自供电的氧化铜纳米带阵列PEC PDs在365至850 nm范围内展现出良好的紫外-可见-近红外光响应，在455 nm光照下具有-83.18 mA/W的高响应度、28/140 ms的快速响应时间，并且在模拟海水中具有良好的稳定性。当使用海水或模拟海水作为电解质时，该高响应度超过了所有已报道的PEC PDs。此外，氧化铜纳米带阵列PEC PDs还展现出良好的360°全向光电探测和水下无线光通信能力。本工作为实现全向可见光PEC PDs提供了新的见解，并展示了氧化铜纳米带阵列在水下光电器件中的潜在应用。
