期刊
ADVANCED OPTICAL MATERIALS
卷 6, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201800038
关键词
[1,2,5]thiadiazolo[3,4-g]quinoxaline; broad spectral response; polymer photodiodes; low-bandgap polymers
资金
- National Natural Science Foundation of China [21474105, 21474102]
- International Cooperation Foundation of China [2015DFR10700]
- Natural Sciences and Engineering Research Council of Canada
Polymer photodiodes with broad spectral response above 1500 nm can be used for imaging in the near-infrared window of the atmosphere. Three low-bandgap polymers based on 3,6-dithiophen-2-yl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (DPP), [1,2,5]thiadiazolo[3,4-g]quinoxaline (TQ), benzobisthiadiazole (BBT), and dithienopyrrole (DTP) are designed and synthesized. No-gain and gain polymer photodiodes with polymers:PC71BM as active layer materials and with aluminum doped ZnO nanoparticles:2,9-bis(3-(dimethylamino)propyl)anthra[2,1,9-def:6,5,10-def]diisoquinoline-1,3,8,10(2H,9H)-tetraone (AZO:PDIN), MoO3, and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) as interlayer materials are prepared. No-gain photodiodes based on polymer P1 exhibit the external quantum efficiency (EQE) of 7.8% at 1200 nm, which is among the best values of polymer photodiodes known to date. Gain photodiodes based on P1 and P3 also exhibit a maximal EQE near 1200 nm. In addition, gain photodiodes based on P1 have a specific detectivity over 10(13) Jones in 300-1360 nm and spectral response in the region of 300-1700 nm.
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