Fabrication of Multi-layer Polymer Light Emitting Diodes using a Photo Cross-linking Method
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概要
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We report on a method of fabricating multi-layer polymer light emitting diodes in this study. A hole transporting layer (HTL) was cross-linked by UV irradiation. It was found that both free radical and cationic polymerization mechanisms could be applied to cross-link the HTL and that the hole transporting properties of HTL were not greatly reduced by the UV cross-linking reactions. An emitting layer could also be cross-linked by UV-irradiation without damaging its light emitting properties. By cross-linking the hole transporting layer and emitting layer, bi-layer and multilayered polymer light emitting diodes with an HTL and an electron transporting layer (ETL) can be fabricated through a wet process method, such as spin coating. The characteristics of light emitting diodes, such as efficiency and life time, can be greatly improved by introducing a hole transporting layer into the polymer light emitting diodes. The improvements in the properties of PLED due to a multilayer structure were attributed to improvements in the carrier injection balance of the emitting layer.
- The Society of Photopolymer Science and Technology (SPST)の論文
The Society of Photopolymer Science and Technology (SPST) | 論文
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