화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.26, No.11, 973-977, November, 2018
DOI10.1007/s13233-018-6135-8  Export Citation
Laser-Induced Morphology Change Based on Small Molecular Model Compounds Photo-Detector
Ruiping Qin†, Deen Guo, Jien Yang, and Yurong Jiang
  • College of Physics & Materials Science, Key Laboratory of Photovoltaic Materials of Henan Province, Henan Normal University, Xinxiang 453007, P. R. China
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Three small molecules furnished with a planar core, (5,6-bis(octyloxy) benzo[c][1,2,5] thiadiazole-4,7-diyl)bis(thiophene-5,2-diyl), and two wings, thieno [3,2-b]indole or carbazoles, were synthesized and used as sensing layer to make photo-detectors. The devices can detect photons at a wavelength band of 300-700 nm and exhibit a sensitive photo-response under on/off modulation. Near UV (405 nm) and visible (532 nm) laser beam were the light source in this work. The corrected responsivity reached up to 498 mA W-1 at 532 nm and 411 mA W-1 at 405 nm. Laser induced photo-current escalation was observed and investigated. For longer molecules, the photo-current was easy to be constant than the shorter reference counterpart. This special photo response mechanism was studied by alternating current impedance spectroscopy (IS) measurements and X-ray diffraction (XRD) exprements. Possible relations between molecular weight and various figures of merit for photo detectors were discussed.
Keywords:small molecules;model compounds;photo detectors;laser-induced morphology change;crystalline
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