An ultraviolet photodetector with an active layer composed of solution processed polyfluorene:Zn0.71Cd0.29S hybrid nanomaterials

作者：Sevim Secil; Memisoglu Gorkem; Varlikli Canan^*; Dogan Leyla Eral; Tascioglu Didem; Ozcelik Serdar

来源：Applied Surface Science, 2014, 305: 227-234.

DOI：10.1016/j.apsusc.2014.03.042

• Ultraviolet photo detector
• Hybrid system
• Conjugated polymer
• Quantum dot

An ultraviolet photodetector with an active layer of solution processed polymer:quantum dot hybrid is introduced. Poly[9,9-di-(2-ethylhexyl)-fluoreny1-2,7-diy1] represents the polymer and ZI10.71 Cdo.29S is the quantum dot used for the device. Photophysical studies showed that an electron transfer from the polymer to the ternary quantum dot is thermodynamically favored. Quenching experiments performed between the polymer and quantum dot indicates the formation of a non-fluorescent complex with an association constant of 4.6 x 10(4)M(-1). The device structure of ITO/PEDOT:PSSIADS231BE: 50 wt% ZI10.71 Cd0.29S/A1 yielded a photoresponsivity value of 324 mAIIN at -4 V under 1 mIN/cm(2) illumination at 365 nm at room temperature and this value is further increased to 380 mAIIN as a result of annealing at 75 degrees C.

• 出版日期2014-6-30