標題: Improving the carrier balance of light-emitting electrochemical cells based on ionic transition metal complexes
作者: Su, Hai-Ching
Hsu, Jia-Hong
照明與能源光電研究所
Institute of Lighting and Energy Photonics
公開日期: 1-一月-2015
摘要: Recently, solid-state light-emitting electrochemical cells (LECs) based on ionic transition metal complexes (iTMCs) have attracted much research interest since they have the advantages of a simple device structure, a low operation voltage and compatibility with air-stable electrodes. These properties enable LECs to be cost-effective, versatile and power-efficient organic light-emitting sources. However, it is generally not easy to modify the molecular structure to achieve balanced carrier mobilities without altering the photoluminescence quantum yield of the iTMC. Furthermore, the carrier balance and the consequent device efficiency of single-layered LECs would not be easy to optimize since no carrier injection and transport layers can be used. In this perspective, some reported techniques to improve carrier balance of LECs based on iTMCs are described and reviewed. The importance and impact of these studies are highlighted. The effects on device lifetime and turn-on time because of employing these techniques to improve the carrier balance are also discussed. This perspective concludes that even with electrochemically doped layers, improving the carrier balance of LECs would be required for realizing efficient electroluminescent emission from simple-structure organic light-emitting sources.
URI: http://dx.doi.org/10.1039/c4dt01675k
http://hdl.handle.net/11536/124723
ISSN: 1477-9226
DOI: 10.1039/c4dt01675k
期刊: DALTON TRANSACTIONS
Volume: 44
Issue: 18
起始頁: 8330
結束頁: 8345
顯示於類別:期刊論文