Spectroscopic ellipsometry study of Ir(ppy)3 organic light emitting diode

Moisture barrier properties of single-layer graphene deposited on Cu films for Cu metallization

“…SE is very useful for determining the optical constants, namely, refractive index (n), extinction coefficient (k), and the thicknesses of various thin films determined from the best fitting of ellipsometric results. [27][28][29][30][31] The non-uniform SLG, as shown in Fig. 2(a), was measured after 200 h of ADT at twelve points on the sample surface using spectroscopic phasemodulated ellipsometer (UVISEL™2) in the wavelength range of 206-824 nm (1.5-6.0 eV) with the measured spot diameter of ∼500 µm at an incident angle of 70°.…”

“…The algorithm of fitting between the generated and measured ellipsometric parameters was performed. 27) During the fitting, all the generated models can be changed to minimize mean square error (MSE) between the measured and generated parameters. 27) In this work, we first propose the basic model, as shown in Fig.…”

Self-absorption in a light-emitting electrochemical cell based on an ionic transition metal complex

“…where d AM is the thickness of the active material, n air (¼ 1) and n AM (%n iTMC ¼ 1.8) 19 are the refractive indices of air and the active material, respectively, and h air (here, 45 ) is the angle of incidence with respect to the normal. If we further assume that the p-n junction is 10 nm thick, and that the p-and n-doped regions are equally thick, we find that the optical path length through the doping regions is:…”

Morphology and electrical properties of electrochemically synthesized pyrrole–formyl pyrrole copolymer

“…Among conducting polymers, polypyrrole is one of the most famous ones, which has been used in several applications such as batteries [4,5], sensors and biosensors [6][7][8][9][10][11], electrochromic displayers [12,13], lightemitting diodes [14,15], capacitors [16,17], enzyme electrodes [18][19][20] and membrane [21,22]. Based on final application, different methods can be used to synthesize polypyrrole, for instance, chemical [23], electrochemical [24], photochemical [25] and electrospinning [26] polymerization.…”