| Title |
High light-quality OLEDs with a wet-processed single emissive layer / |
| Authors |
Singh, Meenu ; Jou, Jwo-Huei ; Sahoo, Snehasis ; Sujith, S.S ; He, Zhe-Kai ; Krucaite, Gintare ; Grigalevicius, Saulius ; Wang, Ching-Wu |
| DOI |
10.1038/s41598-018-24125-4 |
| Full Text |
|
| Is Part of |
Scientific reports.. London : Springer Nature. 2018, vol. 8, iss. 1, art. no. 7133, p. 1-9.. eISSN 2045-2322 |
| Keywords [eng] |
OLEDs ; wet-processed single emissive layer ; multiple emitters |
| Abstract [eng] |
High light-quality and low color temperature are crucial to justify a comfortable healthy illumination. Wet-process enables electronic devices cost-effective fabrication feasibility. We present herein low color temperature, blue-emission hazards free organic light emitting diodes (OLEDs) with very-high light-quality indices, that with a single emissive layer spin-coated with multiple blackbody-radiation complementary dyes, namely deep-red, yellow, green and sky-blue. Specifically, an OLED with a 1,854 K color temperature showed a color rendering index (CRI) of 90 and a spectrum resemblance index (SRI) of 88, whose melatonin suppression sensitivity is only 3% relative to a reference blue light of 480 nm. Its maximum retina permissible exposure limit is 3,454 seconds at 100 lx, 11, 10 and 6 times longer and safer than the counterparts of compact fluorescent lamp (5,920 K), light emitting diode (5,500 K) and OLED (5,000 K). By incorporating a co-host, tris(4-carbazoyl-9-ylphenyl)amine (TCTA), the resulting OLED showed a current efficiency of 24.9 cd/A and an external quantum efficiency of 24.5% at 100 cd/m2. It exhibited ultra-high light quality with a CRI of 93 and an SRI of 92. These prove blue-hazard free, high quality and healthy OLED to be fabrication feasible via the easy-to-apply wet-processed single emissive layer with multiple emitters. |
| Published |
London : Springer Nature |
| Type |
Journal article |
| Language |
English |
| Publication date |
2018 |
