期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 10, 页码 9176-9183出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b16788
关键词
organic photodetectors; solution processing; transfer printing; electron-blocking layer; suppressing dark current
资金
- National Natural Science Foundation of China [51403071]
- Recruitment Program of Global Youth Experts
- Fundamental Research Funds for the Central Universities
- HUST [2016JCTD111]
- Department of Homeland Security [2014-DN-077-ARI069-02]
- National Science Foundation [ECCS-1348272]
Low noise current is critical for achieving high-detectivity organic photodetectors. Inserting charge-blocking layers is an effective approach to suppress the reverse-biased dark current. However, in solution-processed organic photodetectors, the charge-transport material needs to be dissolved in solvents that do not dissolve the underneath light-absorbing layer, which is not always possible for all kinds of light-absorbing materials developed. Here, we introduce a universal strategy of transfer-printing a conjugated polymer, poly(3-hexylthiophene) (P3HT), as the electron-blocking layer to realize highly sensitive photodetectors. The transfer-printed P3HT layers substantially and universally reduced the reverse-biased dark current by about 3 orders of magnitude for various photodetectors with different active layers. These photodetectors can detect the light signal as weak as several picowatts per square centimeter, and the device detectivity is over 10(12) Jones. The results suggest that the strategy of transfer-printing P3HT films as the electron-blocking layer is universal and effective for the fabrication of sensitive organic photodetectors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据