Full-color displays based on micro light-emitting diodes (μLEDs) have gained expanding research interest. In the study, nanoring (NR) structures are fabricated in certain regions on a green LED epitaxial wafer, and the color of NR-μLEDs can be tuned from green to blue duo to the strain relaxation. In order to improve the luminous efficiency of NR-μLEDs, atomic layer deposition technique is utilized to deposit an Al2O3 layer on the sidewall of NR-μLEDs. As a result, the photoluminescence intensity is significantly improved by 143.7 %. Moreover, red quantum dots (QDs) are sprayed on some blue NR-μLEDs to achieve the RGB full-color display. Because QDs are directly contacted with quantum wells of NR-μLEDs, the color conversion efficiency of QDs can be improved by the nonradiative energy transfer phenomenon. To further improve the color purity of the red light, a distributed Bragg reflector (DBR) is developed to recycle the excitation light. This study can achieve the full-color display on a monolithic epitaxial wafer, providing a novel and feasible method for realizing micro-displays.
|頁（從 - 到）
|Digest of Technical Papers - SID International Symposium
|Published - 2019
|International Conference on Display Technology, ICDT 2019 - Suzhou, China
持續時間: 26 3月 2019 → 29 3月 2019