2010
DOI: 10.1016/j.orgel.2010.03.002
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Orientation of emissive dipoles in OLEDs: Quantitative in situ analysis

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Cited by 127 publications
(110 citation statements)
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“…This different interference effect can be explained by considering the phase relationship between the forward (towards the substrate) and backward (towards the cathode) electric fields in addition to the phase shift at the cathode. In the case of vertical emitter, the forward and the backward electric fields are initially out of phase with a phase difference of π , while they are in phase for the horizontal emitters [25]. These results clearly demonstrate that the emitter orientation is the most important factor for the OCE at a fixed emitter-cathode distance.…”
Section: Resultsmentioning
confidence: 64%
See 1 more Smart Citation
“…This different interference effect can be explained by considering the phase relationship between the forward (towards the substrate) and backward (towards the cathode) electric fields in addition to the phase shift at the cathode. In the case of vertical emitter, the forward and the backward electric fields are initially out of phase with a phase difference of π , while they are in phase for the horizontal emitters [25]. These results clearly demonstrate that the emitter orientation is the most important factor for the OCE at a fixed emitter-cathode distance.…”
Section: Resultsmentioning
confidence: 64%
“…Recent studies showed that it was possible to control the emitting molecular orientation, thus the emitter orientation, with respect to the normal of the OLED layers to some degree [24][25][26][27][28][29]. The emission process in OLEDs can be regarded as a dipole transition of the emissive molecules.…”
Section: Introductionmentioning
confidence: 99%
“…순수하게 기하광학적 고려만을 하게 되면 발생한 빛의 20% 미만이 에어 모드로 빠져나가는 것으로 계산된다 [3] . 그 동안 많은 연구자들에 의해 OCE를 향상시키기 위한 다양한 광학 구조가 제안되어 왔는데, 마이 크로렌즈 혹은 확산층을 활용해 기판모드를 추출하는 방법 [5][6][7][8][9][10][11][12] , 도파관 모드로 갇히는 빛을 빼내기 위해 OLED의 내부 구조를 다양하게 변형시키는 접근 방법 [13][14][15][16][17][18][19][20] , 플라스몬 손실 을 줄이거나 [21] 다양한 접근법들을 동시에 적용하는 하이브 리드 방법 [22,23] , 발광층 내 발광자의 방향을 조절하는 방법 [24][25][26][27][28][29][30][31] 등이 시도되어 왔다.…”
unclassified
“…최근 OLED 내 발광자의 방향, 즉 쌍극 자의 진동방향에 따라 OLED의 효율이 큰 폭으로 달라질 수 있다는 연구 결과들이 발표된 바 있다. [24][25][26][27][28][29] and (c) 5×5 pillow lens arrays. The particle density and the diameter were fixed to be 10 8 mm -3 and 600 nm, respectively.…”
unclassified