000			a
999			_c17747 _d17747
003			OSt
005			20221012105131.0
008			221012b xxu||||| |||| 00| 0 eng d
040			_aAIKTC-KRRC _cAIKTC-KRRC
100			_918248 _aTripathi, Aparna
245			_aEfficient green phosphorescent organic light emitting diode using iridium complex
250			_aVol.60(5), May
260			_aNew Delhi _bCSIR _c2022
300			_a415-421p.
520			_aWe report here the fabrication and characterization of an efficient green phosphorescent organic light emitting diodes (PhOLED) using phosphorescent iridium complex, tris(2-phenylpyridine) iridium (III) (Ir(ppy)3). Ir(ppy)3 is an organic phosphorescent material, which emits green light via both the singlet as well as triplet exciton relaxation. To avoid triplettriplet annihilation and for efficient light emission, the phosphorescent emitters should be doped in a suitable host material which has band-gap larger than the doped guest material and the band gap of the guest should lie within the band-gap of the host. We optimally doped phosphorescent Ir(ppy)3 into a fluorescent 4,4'-bis(9-carbazolyl) biphenyl (CBP) host and used it as the emitter to prepare PhOLEDs. The PhOLED exhibited green electroluminescence (EL) in the range ~ 480-650 nm with EL peak at 550 nm along with a shoulder at 510 nm. The Commission Internationale de-I’eclairage (CIE) colour coordinate of the device was measured to be (0.25, 0.60). The current density vs voltage vs luminescence (J-V-L) characteristics of the device led us to calculate its current efficiency, which was found to be 28.9 cd/A at 7V. The efficiency of PhOLED decreased with increment in the applied voltage beyond 7 V and has been attributed to the triplet-triplet annihilation due to high injected current densities.
650		0	_94642 _aHumanities and Applied Sciences
700			_914787 _aPankaj Kumar
773	0		_dNew Delhi CSIR-NISCAIR _x0019-5596 _tIndian journal of pure & applied physics (IJPAP)
856			_uhttp://op.niscpr.res.in/index.php/IJPAP/article/view/59238 _yClick here
942			_2ddc _cAR