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Theoretical perspective to light outcoupling and management in perovskite light-emitting diodes.
- Source :
-
Organic Electronics . Oct2018, Vol. 61, p351-358. 8p. - Publication Year :
- 2018
-
Abstract
- Despite the rapid development of high-efficiency perovskite light-emitting diodes (PeLEDs) via material design and morphology control, a comprehensive evaluation of the power loss among various optical modes has seldom been conducted for the precise design of device architectures. Here, a quantitative analysis of light outcoupling efficiency (η out ) of PeLEDs is presented with the theoretical simulations by taking into account the key factors of refractive index and film thickness of various functional layers, and the emitter dipole orientation. For a planar PeLED, a rational design to enhance the η out is predicted by constructing multilayer stack in series of transparent electrode/high-index transport layer/perovskite emitter/low-index transport layer/reflective electrode. Furthermore, the role of photonic structures on the outcoupling management is explored, and the potential of a substantial increase in η out is demonstrated with an enhancement factor of over 1.75 by implementing a moth-eye nanostructure into the emitter. We anticipate that the findings shown here will provide the design guidelines for the optical optimization of PeLEDs. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PEROVSKITE
*LIGHT emitting diodes
*ELECTRODES
*NANOCOMPOSITE materials
*PHOTONICS
Subjects
Details
- Language :
- English
- ISSN :
- 15661199
- Volume :
- 61
- Database :
- Academic Search Index
- Journal :
- Organic Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 130838894
- Full Text :
- https://doi.org/10.1016/j.orgel.2018.06.014