Tun-Sein Tan

Title: The Innovations of Tun-Sein Tan

Introduction

Tun-Sein Tan is a notable inventor based in Los Altos Hills, California. He has made significant contributions to the field of light-emitting devices, particularly through his innovative patent. His work focuses on improving the efficiency of light-emitting devices by optimizing the thickness of active layers.

Latest Patents

Tun-Sein Tan holds a patent for "lll-phosphide light emitting devices with thin active layers." This invention addresses the challenge of balancing the internal quantum efficiency and extraction efficiency of light-emitting devices. By making the absorbing device layers as thin as possible, the extraction efficiency can be enhanced. However, the internal quantum efficiency tends to decrease with thinner layers. Tan's patent outlines an optimal active layer thickness that balances these two effects. The design includes an AlGaInP LED with a substrate and device layers, featuring an AlGaInP lower confining layer, an AlGaInP active region, and an AlGaInP upper confining layer. The absorbance of the active region is at least one-fifth of the total absorbance in the device. Additionally, the device may include setback layers of AlGaInP to further improve performance. The p-type upper confining layer can be doped with oxygen to enhance reliability.

Career Highlights

Tun-Sein Tan is currently associated with Philips Lumileds Lighting Company LLC, where he continues to innovate in the field of lighting technology. His work has contributed to advancements in LED technology, making significant impacts on energy efficiency and lighting quality.

Collaborations

Throughout his career, Tan has collaborated with notable colleagues, including Nathan Frederick Gardner and Fred A Kish. These collaborations have fostered a productive environment for innovation and development in lighting technologies.

Conclusion

Tun-Sein Tan's contributions to the field of light-emitting devices exemplify the importance of innovation in technology. His patent on thin active layers in light-emitting devices showcases his commitment to enhancing efficiency and reliability in lighting solutions.