Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/72456
Title: | A printed hybrid warm white light source : from fabrication to physics-based model | Authors: | Zhang, Shuai | Keywords: | DRNTU::Science::Physics::Optics and light | Issue Date: | 2017 | Source: | Zhang, S. (2017). A printed hybrid warm white light source : from fabrication to physics-based model. Doctoral thesis, Nanyang Technological University, Singapore. | Abstract: | With the emerging of printed flexible and stretchable devices, a warm white light source is desirable to minimize the ecological impacts and human health issues brought by light emitting diodes (LEDs). Drop casting, wet stamping and bar coating processes together with screen printing technique are implemented to fabricate AC powder electroluminescent (ACPEL) devices hybrid with a layer of organic downshifting dyes. With the optimization of process conditions and design of experiments on solution formulation, a warm white hybrid light source with CCT of 2820 K and luminance of 72.28 cd/m2 is achieved. However, the warm white hybrid ACPEL devices have a luminous efficacy of only 0.5 lm/W. ZnS phosphor level and device level models on charge transport, relaxation and accumulation mechanisms are constructed to explain the observed low luminous efficacy. | URI: | http://hdl.handle.net/10356/72456 | DOI: | 10.32657/10356/72456 | Schools: | School of Electrical and Electronic Engineering | Organisations: | A*STAR SIMTech | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | EEE Theses |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
thesis.pdf | 29.02 MB | Adobe PDF | View/Open |
Page view(s) 50
480
Updated on Mar 18, 2024
Download(s) 50
165
Updated on Mar 18, 2024
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.