期刊
SCIENTIFIC REPORTS
卷 10, 期 1, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-020-64565-5
关键词
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资金
- Israel Science Foundation [488/16]
- Adelis Foundation for renewable energy research within the framework of the Grand Technion Energy Program (GTEP)
- Technion Ollendorff Minerva Center
Organic photodiodes (OPDs) for its interesting optoelectronic properties has the potential to be utilized with complementary metal-oxide-semiconductor (CMOS) circuit for imaging, automotive, and security based applications. To achieve such a hybrid device as an image sensor, it is imperative that the quality of the OPD remains high on the CMOS substrate and that it has a well-connected optoelectronic interface with the underneath readout integrated circuit (ROIC) for efficient photogeneration and signal readout. Here, we demonstrate seamless integration of a thermally deposited visible light sensitive small molecule OPD on a standard commercial CMOS substrate using optimized doped PCBM buffer layer. Under a standard power supply voltage of 3V, this hybrid device shows an excellent photolinearity in the entire bias regime, a high pixel sensitivity of 2V/Lux.sec, a dynamic range (DR) of 71dB, and a low dark leakage current density of 1nA/cm(2). Moreover, the integrated OPD has a minimum bandwidth of 400kHz. The photoresponse nonuniformity being only 1.7%, achieved under research lab conditions, strengthens the notion that this fully-CMOS compatible technology has the potential to be applied in high-performance large-scale imaging array.
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