期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 217, 期 15, 页码 1683-1689出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201600061
关键词
all-polymer photodetector; broad response; energy level; film microstructure; high detectivity
资金
- International Cooperation Foundation of China [2015DFR10700]
- National Natural Science Foundation of China [21134005, 21474102, 21474105, 51403203, 61204059]
- Basic Research Project of Jilin Province [20150520018JH]
- Natural Science and Engineering Research Council of Canada
Broad-response and high-detectivity for all-polymer photodetectors based on p-and n-type semiconducting polymers have been achieved through optimization of polymer property and film microstructure. The electron-donating units in the p-type polymers affect a great deal of the polymer properties such as solubility, absorption spectra, and electronic energy levels, which in turn can influence the device performance. The polymer (P3) based on dithienopyrrole and diketopyrrolopyrrole is most promising for photodetector applications, as it possesses the suitable energy level with regard to the n-type polymer and exhibits appropriate film morphology and molecular stacking with aid of 1,8-diiodooctane as an additive during film processing. The photodetector based on P3/poly{[N,N'-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)} (PNDI) exhibits good response from 300 to 1100 nm and nearly constant detectivity (D*) above 10(12) Jones at 330-980 nm, rendering a great potential of all-polymer photodetectors for practical applications.
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