| 초록 |
A long-term stability of quantum dot (QD)-based device under harsh environmental conditions has been a critical bottleneck to be resolved for commercial use. Here, we demonstrate extremely stable QD/alumina/polymer hybrid structure by combining internal atomic layer deposition (ALD) infilling with polymer encapsulation. ALD infilling and polymer encapsulation of QDs synergistically prohibit the degradation of QDs in terms of optical, thermal and humid attacks. Our hybrid QD/alumina/polymer film structure showed no noticeable reduction in photoluminescence even for commercial grade test (85 % humidity at 85 °C) during 28 days. In addition, we successfully fabricated a QD-based light-emitting device with high brightness and excellent long-term stability by incorporating hybrid QD/alumina/polymer film as a color conversion material on light emitting diode (LED) chips. |
