A study on the characteristics of indirect-type organic detector using p-type polycarbazole copolymer for X-ray imaging

作者：Seon H; Ban D; Kang J^*

来源：Journal of Instrumentation, 2018, 13(01): C01031.

DOI：10.1088/1748-0221/13/01/C01031

• Materials for solid-state detectors
• Photon detectors for UV
• visible and IR photons (solid-state)
• Solid state detectors

To improve sensitivity of the indirect-type organic detector, polycarbazole copolymer poly [N-9 '-heptadecanyl-2,7-carbazole-alt-5,5-(4 ',7 '-di-2-thienyl-2 ',1 ',3 '-benzothiadiazole)] (PCDTBT) was examined as p-type material instead of the common poly (3-hexylthiophene) (P3HT). The fullerene derivative [6,6]-phenyl-C-71-butyric acid methyl ester (PC70BM) was selected as an n-type material. To find optimal process condition, blending ratio and spin-coating condition of PCDTBT: PC70BM active layer were examined. The organic detector at the condition of PCDTBT: PC70BM = 1: 4 blending ratio and 1500 rpm spin-rate revealed highest sensitivity of 1.69 mA/Gy.cm(2) and highest power conversion efficiency (PCE) of 4.83%. Compare to the common P3HT: PC70BM detector, it revealed 39.7% enhancement of sensitivity and 67.1% enhancement of PCE.

• 出版日期2018-1