High-Reliability Perovskite Quantum Dots Using Atomic Layer Deposition Passivation for Novel Photonic Applications
Tzu-Yi Lee,
Tsau-Hua Hsieh,
Wen-Chien Miao,
Konthoujam James Singh,
Yiming Li,
Chang-Ching Tu,
Fang-Chung Chen,
Wen-Chung Lu,
Hao-Chung Kuo
Affiliations
Tzu-Yi Lee
Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Tsau-Hua Hsieh
Technology Development Center, InnoLux Corporation, Hsinchu 35053, Taiwan
Wen-Chien Miao
Semiconductor Research Center, Hon Hai Research Institute, Taipei 11492, Taiwan
Konthoujam James Singh
Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Yiming Li
Institute of Communications Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Chang-Ching Tu
Semiconductor Research Center, Hon Hai Research Institute, Taipei 11492, Taiwan
Fang-Chung Chen
Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Wen-Chung Lu
Executive Office, SkyTech Institute, Hsinchu 303, Taiwan
Hao-Chung Kuo
Department of Photonics, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
In this study, we propose highly stable perovskite quantum dots (PQDs) coated with Al2O3 using atomic layer deposition (ALD) passivation technology. This passivation layer effectively protects the QDs from moisture infiltration and oxidation as well as from high temperatures and any changes in the material characteristics. They exhibit excellent wavelength stability and reliability in terms of current variation tests, long-term light aging tests, and temperature/humidity tests (60°/90%). A white-light system has been fabricated by integrating a micro-LED and red phosphor exhibiting a high data transmission rate of 1 Gbit/s. These results suggest that PeQDs treated with ALD passivation protection offer promising prospects in full-color micro-displays and high-speed visible-light communication (VLC) applications.
