Fabrication of microlens
| Autor: | Yu-Hsin Hsieh, 謝郁新 |
|---|---|
| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 In this thesis, we will fabricate specially arranged spherical/aspherical microlens arrays. We will observe surface morphology and feature sizes of microlens arrays made by different manufacturing processes, and investigate the influences of parameters of microlens arrays on optical properties and efficiencies of low-color-temperature candle-like organic light-emitting devices (OLED). Four different manufacturing processes will be proposed in this thesis: photolithography, diffuser lithography, tilt lithography, and composite lithography (combined with diffuser lithography and tilt lithography). For the photolithography and diffuser lithography, we study the influences of the diffuser film on the gap, fill factor, and surface morphology of the produced microstructures. In the tilt lithography experiment, we used an additional Fresnel lens on the photomask to make tilt microstructures. Final, in the composite lithography experiment, we successfully make tilt microlens arrays, having a fill factor of 77%. The tilt microlens array can improve the luminous current efficiency and luminous power efficiency of a low-color-temperature candle-like OLED up to 19% and 32.7%, respectively |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|