Effect of the polymer emission on the electroluminescence characteristics of n-ZnO nanorods/p-polymer hybrid light emitting diode |
| |
Authors: | Zaman S Zainelabdin A Amin G Nur O Willander M |
| |
Institution: | 1.Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden ; |
| |
Abstract: | Hybrid light emitting diodes (LEDs) based on zinc oxide (ZnO) nanorods and polymers (single and blended) were fabricated and
characterized. The ZnO nanorods were grown by the chemical bath deposition method at 50°C. Three different LEDs, with blue
emitting, orange-red emitting or their blended polymer together with ZnO nanorods, were fabricated and studied. The current–voltage
characteristics show good diode behavior with an ideality factor in the range of 2.1 to 2.27 for all three devices. The electroluminescence
spectrum (EL) of the blended device has an emission range from 450 nm to 750 nm, due to the intermixing of the blue emission
generated by poly(9,9-dioctylfluorene) denoted as PFO with orange-red emission produced by poly(2-methoxy-5(20-ethyl-hexyloxy)-1,4-phenylenevinylene)
1,4-phenylenevinylene) symbolized as MEH PPV combined with the deep-band emission (DBE) of the ZnO nanorods, i.e. it covers
the whole visible region and is manifested as white light. The CIE color coordinates showed bluish, orange-red and white emission
from the PFO, MEH PPV and blended LEDs with ZnO nanorods, respectively. These results indicate that the choice of the polymer
with proper concentration is critical to the emitted color in ZnO nanorods/p-organic polymer LEDs and careful design should
be considered to obtain intrinsic white light sources. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|