Novel benzochromene and thioarene for organic electronic devices

TitleNovel benzochromene and thioarene for organic electronic devices
Publication Typeวิทยานิพนธ์/Thesis
Year of Publication2018
AuthorsThikhamporn Uppalabat
DegreeM.Sc. -- Major in Chemistry
InstitutionFaculty of Science, Ubon Rachathani University
CityUbon Rachathani
Call NumberTK T439 2018
KeywordsBenzochromene, Field-effect transistors, Light emitting diodes, Organic field effect transistors, organic light-emitting diodes, PI-conjugated system, Thioarene

Design and development of the organic structures with π-conjugated system were interested for using in electronic device such as organic light emitting diodes (OLEDs) and organic field effect transistors (OFETs). In this work, we synthesized π-conjugated of benzochromene (ARAR2 and ARAR3) and thioarene (ARTH2, ARTH3 and THTH2) derivatives via Sonogashira coupling, direct cross-coupling, ruthenium cyclization and Scholl reactions, respectively. All target compounds were characterized by 1H NMR,13C NMR, FT-IR and mass spectroscopy. Moreover, the chemical structure of ARTH2 was clearly characterized by 2D NMR (COSY and HMBC spectroscopy). The photophysical properties of target compounds showed photoluminescence emission which appeared in range of green regions with fluorescence process. The ARTH2, ARTH3 and THTH2 which are thioarene products showed a high thermal stability. After that, all target compounds were studied OLED performance by using the structure of ITO/NPB/MADN: 20%wt of targeted compounds/Bphen/LiF/Al. The results indicated that ARTH2 showed the best performance and exhibited yellowish green colour with maximum luminance at 4,699 cd/m2, current and power efficiencies at 2.71 cd/A and 0.79 Lm/W, resprctively. In addition, the target compounds were investigated in OFETs. It was found that THTH2 showed the p-type character with hole mobility of 1.64x10-2 cm2/Vs and on/off current ration of 6.48

Title Alternate สารเบนโซโครมีนและไทโอเอรีนชนิดใหม่สำหรับอุปกรณ์อิเล็กทรอนิกส์ชนิดสารอินทรีย์