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Micro-Prism Patterned Remote Phosphor Film for Enhanced Luminous Efficiency and Color Uniformity of Phosphor-Converted Light-Emitting Diodes
| Content Provider | MDPI |
|---|---|
| Author | Yu, Jiadong Yu, Shudong Fu, Ting Tang, Yong |
| Copyright Year | 2021 |
| Description | In this work, we propose micro-prism patterned remote phosphor (RP) films to enhance both luminous efficiency and color uniformity (CU) of remote phosphor-converted light-emitting diodes (rpc-LEDs) simultaneously. On the incident surface of the RP film, one micro-prism film is used to extract backward light by double reflection. On the exit surface, the other micro-prism film is adopted to retain blue light inside the RP film, thus enhancing the phosphor excitation. Experimental results show that double prism-patterned RP (DP-RP) film configuration shows a luminous flux of 55.16 lm, which is 45.1% higher than that of RP film configuration at 300 mA. As regards the CU, the DP-RP film configuration reduces the angular CIE-x and CIE-y standard variations by 68% and 69.32%, respectively, compared with the pristine device. Moreover, the DP-RP film configuration shows excellent color stability under varying driving currents. Since micro-prism films can be easily fabricated by a roll-to-roll process, the micro-prism patterned RP film can be an alternative to a conventional RP layer to enable the practical application of rpc-LEDs. |
| Starting Page | 1117 |
| e-ISSN | 2072666X |
| DOI | 10.3390/mi12091117 |
| Journal | Micromachines |
| Issue Number | 9 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-09-17 |
| Access Restriction | Open |
| Subject Keyword | Micromachines Industrial Engineering Micro-prism Light-emitting Diode Remote Phosphor |
| Content Type | Text |
| Resource Type | Article |
