BROWSE
Detail
Journal Article
Save Energy on OLED Lighting by a Simple yet Powerful Technique
Cited 23 time in 
Share 
Share
- Authors
- Joo Yeon Kim, Chul Woong Joo, Jonghee Lee, Jong-Chang Woo, Ji-Young Oh, Nam Seob Baek, Hye Yong Chu, Jeong-Ik Lee
- Issue Date
- 2014-12
- Citation
- RSC Advances, v.5, no.11, pp.8415-8421
- ISSN
- 2046-2069
- Publisher
- Royal Society of Chemistry (RSC)
- Language
- English
- Type
- Journal Article
- Abstract
- Due to the very low light extraction efficiency of conventional organic light-emitting diodes (OLEDs), the application of OLEDs for next-generation lighting remains limited. Therefore, in order to enhance the light extraction efficiencies that result in improving the luminous efficacy (LE, lm W-1) and external quantum efficiency (ηEQE, %) of OLEDs, three different geometrically profiled, negatively nanostructured periodic semi-pyramid polydimethylsiloxane (PDMS) layers are used to create a hole at depths of 500 nm, 650 nm, and 1000 nm; these are designated as the polymeric lighting extraction film (PLEF) I, PLEF II, and PLEF III, respectively. These layers are placed directly on the backside of the green emissive bottom-emitting OLED (BE-OLED) glass substrates as an outcoupling enhancement PLEF that improves the glass substrate/air interface. Through the simple combination with three different nanostructures on each green emissive BE-OLED, a maximum enhancement of up to 50% is achieved in the LE and ηEQE measured at the same brightness, which is 1.5 times higher than the reference green emissive BE-OLED without a PLEF. Therefore, global energy saving can be achieved through reducing the power consumption by up to 30% possibly estimated from LE using the integrated PLEFs.
- KSP Keywords
- Air interface, External Quantum Efficiency, Extraction efficiency(EE), Glass substrate, Global energy saving, Low light, Next-generation, OLED lighting, Power Consumption, Save energy, light emitting diodes(LED)