Facile fabrication of ultralong nanobelts of positively charged PTCDI for high-performance photodetectors
Nanobelts of positively charged PTCDI have been fabricated by a facile solution process, and were ultralong and high crystalline. The prototype photodetector based on the nanobelt network showed excellent reproducibility and stability. The photocurrent only decreased by 2.7% after 600 s. Moreover, the ultralong nanobelts exhibited highly photosensitive and photoresponsive characteristics. The highest photoresponsivity was 9.1 mA W-1, and Ion/Ioff ratio was 610. The facile fabrication and high-performance photodetector makes charged organic nanostructures promising for optoelectronic devices.