期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 5, 期 40, 页码 10543-10548出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tc02787g
关键词
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资金
- National Science Foundation of China [51374029, 51611130063]
- Fundamental Research Funds for the Central Universities [FRF-BD-16-012A]
- 111 Project [B17003]
A hybrid organic/inorganic heterojunction structured photodetector has attracted much attention due to its high device stability and ease of fabrication. In this work, an ultraviolet photodetector with the configuration of spiro-OMeTAD/mesoporous TiO2/compact TiO2 was developed. The small molecule of spiro-OMeTAD was introduced as the active layer, owing to its fast response to the ultraviolet light and high glass transition temperature (T-g). The mesoporous TiO2 layer with a large specific area could accelerate the interface separation of electrons and holes, while the compact TiO2 layer was used to block the charge leakage between FTO and spiro-OMeTAD. With a 100 nm TiO2 mesoporous layer, the photodetector displayed a fast response time (< 0.02 s), a low dark current density (8.79 nA cm(-2)) and a high detectivity (3.5 x 10(13) Jones) at 340 nm light wavelength and a 0.60 V voltage output. Besides, the unencapsulated
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