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Updated: Jun 8, 2026
Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
Partitioning pixel of organic light-emitting devices with center-hollowed microlens-array films for efficiency
Kuan-Yu Chen1, Yu-Ting Hsiao, Hoang Yan Lin
1Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan.
Abstract:
A pixel partition scheme assisted with patterned or center-hollowed microlens-array films (MAFs) was proposed to improve the optical characteristics and electrical properties of organic light-emitting diodes (OLEDs). In our optical simulation results, a pixel of 1 × 1 mm(2) with a center-hollowed MAF has a 42% luminance enhancement; however, after dividing the large pixel into ten by ten smaller pixels of 100 × 100 μm(2), the partitioned units with a corresponding center-hollowed MAF can have a 104% luminance enhancement under the same total active area and the same optical power of organic emitters. Furthermore, a significant 127% luminance enhancement by the introduction of a high-refractive-index substrate can be obtained.
