標題: Optical properties of a novel yellow fluorescent dopant for use in organic LEDs
作者: Choy, WCH
Wu, YS
Chen, CH
Cheah, KW
電子與資訊研究中心
Microelectronics and Information Systems Research Center
公開日期: 1-八月-2005
摘要: In this paper, the optical properties of a novel organic, 2,8-di(t-butyl)-5,11-di[4(t-butyl)phenyl]-6,12-diphenylnaphthacene (tetra(t-butyl)rubrene) have been investigated. Our results show that there are two peaks in the photoluminescence (PL) spectra of tetra(t-butyl) rubrene (TBRb) which are also confirmed in the electroluminescence (EL) spectra. Photo-quenching of the PL intensity is observed when the irradiation time increases. It is shown that oxidation is the dominant reason for photo-quenching. The absolute refractive index and absorption coefficient have also been determined and the results correlate well with the PL results. The results show that TBRb can be a good dopant to achieve the Forster energy transfer and to assist light emission. The optical properties of TBRb are similar to those of rubrene; however, the PL of TBRb is much stronger than that of rubrene. Finally, although crystalline organics have been commonly reported by heating the sample, we report crystallization of TBRb at low temperature < 230 K when the TBRb film is in an amorphous form before cooling.
URI: http://dx.doi.org/10.1007/s00339-004-2950-1
http://hdl.handle.net/11536/13411
ISSN: 0947-8396
DOI: 10.1007/s00339-004-2950-1
期刊: APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume: 81
Issue: 3
起始頁: 517
結束頁: 521
顯示於類別:期刊論文


文件中的檔案:

  1. 000232116100014.pdf