Characteristic of an Organic Photodetector Fabricated With P3HT:ICBA Blending Materials for Indirect X-Ray Detection

• Published in: IEEE transactions on nuclear science Vol. 64; no. 7; pp. 1739 - 1743
• Main Authors: Seon, Hyeji, Kim, Beomsu, Kang, Jungwon
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.07.2017; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Absorption; Blending; Buckminsterfullerene; Charge coupled devices; Charge efficiency; Detectors; Fullerenes; ICBA; Indene; N-type semiconductors; organic photovoltaic device; organic radiation detector; Photodetectors; Photometers; Polymers; Radiation; Sensitivity; Sensitivity enhancement; Sensors; x-ray detector
• ISSN: 0018-9499; 1558-1578
• DOI: 10.1109/TNS.2016.2645228

In this study, an organic conjugated polymer-based photodetector was investigated as a candidate for the indirecttype radiation detector. In order to improve the photon to charge conversion efficiency, we selected the fullerene derivative indeneC60-bisadduct (ICBA) as an n-type semiconductor. The optimal process condition was investigated while varying the P3HT:ICBA blending ratio and spin-rate. The detector at the condition of P3HT:ICBA = 3:2 blending ratio and 900 rpm spin-rate showed the highest sensitivity of 1.35 mC/Gy · cm 2 and the highest PCE of 2.93%. Compared to the common P3HT:PCBM detector, the best P3HT:ICBA detector showed 27.36% enhancement of sensitivity and 27.68% enhancement of the PCE.