000			a
999			_c17816 _d17816
003			OSt
005			20221018093741.0
008			221018b xxu||||| |||| 00| 0 eng d
040			_aAIKTC-KRRC _cAIKTC-KRRC
100			_918248 _aTripathi, Aparna
245			_aWhite organic light emitting diodes via complementary color mixing approach through multilayer device architecture
250			_aVol.60(2), Feb
260			_aNew Delhi _bCSIR _c2022
300			_a105-110p.
520			_aWhite organic light emitting diodes (WOLEDs) are emerging as potential light emitting technology and have found many applications from back light for liquid crystal displays to next generation displays and solid-state lighting. We report here the fabrication of organic light emitting diodes (OLEDs), which emit white light via multilayer color approach. These WOLEDs incorporated the materials emitting two complementary colors greenish-blue and reddish-orange to make white. The amount of light emitted from each layer was chosen in such a way that the mixture of the two emitted lights gave white light. The amount of light emitted from each layer was controlled by taking optimum thickness of each layer and incorporating a thin hole blocking layer of BCP in between the emissive layers. For greenish-blue light, we used a phosphorescent dopant FIrPic whereas for reddish-orange light we used the phosphorescent dopant Ir(btp)2(acac) and both of these dopants were doped in the host CBP. We studied the effect of operating voltage on the color of the emitted light of these WOLEDs and found that the color of the emitted light was almost independent of operating voltage. The WOLEDs emitted 1600 cd/m2 at 15 V with Commission Internationale de I’Eclairage (CIE) coordinates (0.25, 0.32). We also studied the current density vs voltage (J-V) and voltage vs luminescence (V-L) characteristics of these devices and calculated their efficiency which was found to be 0.35 cd/A. We also prepared some WOLEDs based numeric displays just of the demonstration purpose.
650		0	_94642 _aHumanities and Applied Sciences
700			_914787 _aPankaj Kumar
773	0		_dNew Delhi CSIR-NISCAIR _tIndian journal of pure & applied physics (IJPAP) _x0019-5596
856			_uhttp://op.niscair.res.in/index.php/IJPAP/article/view/58368 _yClick here
942			_2ddc _cAR