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Enhancement of Luminance in Powder Electroluminescent Devices by Substrates of Smooth and Transparent Cellulose Nanofiber Films
| Content Provider | MDPI |
|---|---|
| Author | Tsuneyasu, Shota Watanabe, Rikuya Takeda, Naoki Uetani, Kojiro Izakura, Shogo Kasuya, Keitaro Takahashi, Kosuke Satoh, Toshifumi |
| Copyright Year | 2021 |
| Description | Powder electroluminescent (EL) devices with an electric field type excitation are surface light sources that are expected to have a wide range of practical applications, owing to their high environmental resistance; however, their low luminance has hindered their use. A clarification of the relationship between the properties of the film substrates and the electroluminescence is important to drastically improve light extraction efficiency. In this study, powder EL devices with different substrates of various levels of surface roughness and different optical transmittances were fabricated to quantitatively evaluate the relationships between the substrate properties and the device characteristics. A decrease in the surface roughness of the substrate caused a clear increase in both the current density and the luminance. The luminance was found to have a direct relationship with the optical transmittance of the substrates. The powder EL device, which was based on a cellulose nanofiber film and was the smoothest and most transparent substrate investigated, showed the highest luminance (641 cd/cm2) when 300 V was applied at 1 kHz. |
| Starting Page | 697 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano11030697 |
| Journal | Nanomaterials |
| Issue Number | 3 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-03-10 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Paper and Wood Powder Electroluminescent Device Cellulose Nanofiber Paper Electronic Device Paper-based Light-emitting Device |
| Content Type | Text |
| Resource Type | Article |
