期刊
NANOTECHNOLOGY
卷 27, 期 9, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0957-4484/27/9/095203
关键词
nanocrystal; hybrid photodiode; planar heterojunction
资金
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2014M1A3A3A02034707]
- MOTIE (Ministry of Trade, Industry Energy) [10051463]
- KDRC (Korea Display Research Corporation)
- Korea Evaluation Institute of Industrial Technology (KEIT) [10051463] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, the strategy of using an organic-inorganic hybrid planar heterojunction consisting of polymeric semiconductors and inorganic nanocrystals is introduced to realize a high-performance hybrid photodiode (HPD) with low dark current and high detectivity. To prevent undesired charge injection under the reverse bias condition, which is the major dark current source of the photodiode, a well-defined planar heterojunction is strategically constructed via smart solution process techniques. The optimized HPD renders a low dark current of similar to 10(-5) mA cm(-2) at -5V and similar to 10(-6) mA cm(-2) at -1V, as well as a high detectivity similar to 10(12) Jones across the entire visible wavelength range. Furthermore, excellent photocurrent stability is demonstrated under continuous light exposure. We believe that the solution-processed planar heterojunction with inverted structure can be an attractive alternative diode structure for fabricating high-performance HPDs, which usually suffer from high dark current issues.
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