有机发光二极管
掺杂剂
材料科学
光电子学
色度
电致发光
二极管
波长
显色指数
光学
荧光粉
兴奋剂
图层(电子)
纳米技术
物理
作者
Dhruvajyoti Barah,Debdutta Ray
标识
DOI:10.1088/1361-6463/ad1a65
摘要
Abstract The utilization of multiple charge transfer complex-based emissions from a bilayer organic device is a low-cost and simple technique to realize white organic light emitting diodes (WOLEDs). In this work, a WOLED structure is presented where a planar heterojunction of 1, 1-bis ((di-4-tolylamino) phenyl) cyclohexane (TAPC)/Bis [2-(diphenylphosphino) phenyl] ether oxide (DPEPO) is employed for white-light generation and thereby eliminating the blend of host and dopants which is typically used as the emissive layer in OLEDs. The WOLED exhibits a broadband emission with a full-width half maxima of 330 nm. A systematic investigation is carried out to interpret the origins of the red (R), yellow (Y), and blue (B) components of the spectrum. It is shown that the electroplex emission originating from TAPC/DPEPO hetero-interface is responsible for the blue emission peak at a wavelength of 488 nm. The electromer emissions from TAPC and DPEPO result in yellow and red emissions with peak intensities at wavelengths 575 nm and 670 nm, respectively. By tuning the relative intensities of the RYB components, the colour of the emitted light from the OLED can be varied and a pure white emission with the Commission International d’Eclairage coordinate of (0.34, 0.36) and colour rendering index of 89 is demonstrated.
科研通智能强力驱动
Strongly Powered by AbleSci AI