Effect of type-II quantum well of m-MTDATA/α-NPD on the performance of green organic light-emitting diodes
✍ Scribed by Jungjin Yang; C.K. Suman; Changhee Lee
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 601 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0026-2692
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✦ Synopsis
The type-II multiple quantum well (MQW) structure is prepared and introduced into green organic green light-emitting diodes consisting of 4,4 0 -bis-[N-(naphthyl)-N-phenyl-amino]biphenyl (a-NPD) and tris-(8-hydroxyquinolinato)-aluminum (Alq 3 ). The quantum well (QW) and wall are fabricated by 4,4 0 ,4 00 -tris-(3-methylphenylphenylamino)triphenylamine (m-MTDATA) and a-NPD, respectively. The device performance of MQW organic light-emitting diodes (OLEDs) has been improved; the luminous efficiency by 25% and power efficiency by 17% compared with the reference device. The performance improvement can be explained by the increased electron-hole balance in the device due to the hole confinement in the QW structure.