Organic LED based light sensor for detection of ovarian cancer

• Published in: Microelectronic engineering 2019-10, Vol.218, p.111154, Article 111154
• Main Authors: Negi, Shubham, Mittal, Poornima, Kumar, Brijesh, Juneja, Pradeep Kumar
• Format: Article
• Language: English
• Subjects: Bio-medical sensor; Biodegradability; Cancer; Diagnosis; Dual gate-organic thin film transistor (DG-OTFT); Electronic devices; Holes (electron deficiencies); Light emitting diodes; Light sources; Memory devices; Organic light emitting diode (OLED); Organic light emitting diodes; Ovarian cancer; Portable equipment; Sensors; Triple hole block layer (THBL) OLED; Weight reduction
• ISSN: 0167-9317; 1873-5568
• DOI: 10.1016/j.mee.2019.111154

Organic devices possess an interdisciplinary facet that can be utilized in the different fields; communication, memory devices, bio-degradable technology and sensor application owing to their robustness, light weight and low power requirements. The proposed work is focused on the development of a sensor application based on the organic LEDs for the diagnosis of ‘Ovarian Cancer’. Two organic LEDs: Multilayered OLED and triple hole block layer OLED are analyzed for utilization as light detector and light source in the sensing device for cancer detection. Multilayered OLED depicts excellent light detection qualities owing to lower electron hole recombination and it is six times better as compared to the triple hole block layer OLED. Therefore, it is used as the detector element in the sensing device. On the other hand, triple hole block layer OLED, is used as light source due to its high luminescence characteristics of 25,285 cd/m2. Further, a dual gate OTFT is used to drive the triple hole block layer OLED, which is utilized as the light source. DG OTFT in dual gate mode is 18% better compared to single gate mode. Thus DG-OTFT in dual gate mode is able to generate 18 V at the terminals of the triple HBL OLED necessary for its operation. Thereafter, light detection is performed utilizing the OLED. Multilayered OLED depicted excellent light detecting capabilities. It is able to generate a cathode current of 29 mA and 13 mA at an incident wavelength of 420 and 440 nm, respectively, an essential requirement for present sensor application. Therefore, it presents a possibility to fabricate a portable fully flexible device for the screening and diagnosis of the ovarian cancer. [Display omitted] •Work is focused on diagnosis of the ovarian cancer by detecting change in light wavelength on interaction with human urine.•Presence of Pteridines in urine can shift fluorescence observed at 420 nm in healthy person to 440 nm in oncological patient.•Multilayered OLED effectively differentiate between excitation at 420 and 440 nm with 16 mA difference in cathode current.•DG-OTFT is analyzed and validated with reported experimental results. It is 18.36% better compared to single gate mode.•The research paper presents an opportunity to fabricate a portable fully flexible device for the screening of ovarian cancer.