Wai Y Leung

Title: Innovations by Wai Y Leung in Organic Solar Cells and OLEDs

Introduction

Wai Y Leung is an accomplished inventor based in Ames, IA (US). He has made significant contributions to the fields of organic solar cells and organic light-emitting diodes (OLEDs). With a total of 3 patents, his work focuses on enhancing the efficiency of these technologies through innovative designs and fabrication methods.

Latest Patents

One of his latest patents is titled "Textured micrometer scale templates as light managing fabrication platform for organic solar cells." This invention features a three-dimensional, microscale-textured, grating-shaped organic solar cell geometry. The solar cells are fabricated on gratings to provide a three-dimensional texture that enhances light absorption. The introduction of microscale texturing positively affects the overall power conversion efficiency of the devices. This grating-based solar cell, with a predetermined pitch and height, has shown improved power-conversion efficiency compared to conventional flat solar cells. The efficiency improvement is attributed to the homogeneous coverage of the grating with a uniform thickness of the active layer, facilitated by a sufficiently high pitch and low height of the underlying gratings. Additionally, the microscale texturing suppresses the reflection of incident light by efficiently coupling it into modes guided in the active layer.

Another notable patent is "Soft lithography microlens fabrication and array for enhanced light extraction from organic light emitting diodes (OLEDs)." This invention provides microlens arrays designed for use on the substrate of OLEDs to extract more light trapped in waveguided modes within the devices. The light extraction with microlens arrays is efficient not only in the light-emitting area but also across the entire microlens patterned area where waveguiding occurs. The large microlens array, relative to the size of the light-emitting area, extracts more light, resulting in over 100% enhancement. This microlens array is versatile and suitable for all colors, including white, for microcavity OLEDs and OLEDs fabricated directly on the modified microlens array.

Career Highlights

Wai Y Leung is affiliated with the Iowa State University Research Foundation, Inc., where he continues to advance research in organic electronics. His innovative approaches have garnered attention in the scientific community, contributing to the development of more efficient energy solutions.

Collaborations

He has collaborated with notable colleagues,