期刊
NPJ FLEXIBLE ELECTRONICS
卷 1, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41528-017-0005-x
关键词
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资金
- National Natural Science Foundation of China [10974074, 61540076]
- Research Fund for the Doctoral Program of Higher Education of China [20110211110005]
- Research Project of Graduate Teacher of Gansu Province [2014B-079]
Organolead halide perovskite is a newly emerging low-cost, solution-processable material with a broadband absorption from the ultraviolet (UV) to visible (Vis) region, which has attracted a great deal of interest in high-performance optoelectronic devices. However, some practicable applications need a cover of UV-Vis-NIR region for photoelectric conversion, a task that remains a significant challenge for further extending the absorption toward the near-infrared radiation (NIR) region. Here, to the best of our knowledge, we prove for the first time an ultrasensitive flexible broadband photodetector based on porous organolead perovskite-phthalocyanine heterostructure, which combines the synergetic properties of high UV-Vis absorbance of perovskite with enhanced NIR absorption for triclinic lead phthalocyanine. The photosensitivity of the as-prepared devices reaches up to 10(4) at a low intensity of 10 mW cm(-2), which is among the largest values reported for broadband photodetectors. Significantly, performed at room temperature, the device achieves a pA scale dark current along with an ultrafast response speed of less than 0.6 ms for as-adopted full spectra. Our results provide an easy and promising route to develop low-cost, flexible and highly sensitive UV-Vis-NIR photodetectors.
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