Kang Chenxu, Ahsan Iqbal Muhammad, Zhang Suyun, Weng Xiaoliang, Sun Yuting, Qi Lu, Tang Wei, Ruan Shuangchen, Zeng Yu-Jia
Key Laboratory of Optoelectronic Devices and, Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
Key Laboratory of Advanced Optical Precision Manufacturing, Technology of Guangdong Higher Education Institutes, Shenzhen Technology University, Shenzhen, 518118, P. R. China.
Chemistry. 2022 Nov 16;28(64):e202201705. doi: 10.1002/chem.202201705. Epub 2022 Sep 19.
Two-dimensional conductive metal-organic frameworks (2D c-MOFs) are a family of highly tunable and electrically conducting materials that can be utilized in optoelectronics. A major issue of 2D c-MOFs for photodetection is their poor charge separation and recombination dynamics upon illumination. This study demonstrates a Cu (HHTP) /ZnO type-II heterojunction ultraviolet (UV) photodetector fabricated by layer-by-layer (LbL) deposition, in which the charge separation of photogenerated carriers is enhanced. At optimized MOF layer cycles, the device achieves a responsivity of 78.2 A/W and detectivity of 3.8×10 Jones at 1 V. Particularly, the device can be operated in the self-powered mode with an ultrafast response time of 70 μs, which is the record value for MOF-based photodetectors. In addition, even after 1000-time bending of 180°, the flexible device maintains stable performance. This flexible MOF-based UV photodetector with anti-fatigue and anti-bending properties provides strong implication to wearable optoelectronics.
二维导电金属有机框架(2D c-MOFs)是一类具有高度可调节性的导电材料,可用于光电子学领域。二维导电金属有机框架用于光探测的一个主要问题是其在光照下电荷分离和复合动力学较差。本研究展示了一种通过逐层(LbL)沉积制备的Cu(HHTP)/ZnO II型异质结紫外(UV)光电探测器,其中光生载流子的电荷分离得到了增强。在优化的MOF层循环条件下,该器件在1 V时实现了78.2 A/W的响应度和3.8×10琼斯的探测率。特别地,该器件可以在自供电模式下工作,具有70 μs的超快响应时间,这是基于MOF的光电探测器的记录值。此外,即使经过1000次180°弯曲,该柔性器件仍保持稳定性能。这种具有抗疲劳和抗弯曲特性的基于柔性MOF的紫外光电探测器对可穿戴光电子学具有重要意义。