Iain D Calder

Title: Iain D Calder: Innovator in Solid-State Light Emission

Introduction

Iain D Calder is a prominent inventor based in Nepean, Canada, known for his significant contributions to the field of solid-state light emitters. With a total of 15 patents to his name, Calder has made remarkable advancements in the technology of light-emitting devices.

Latest Patents

Calder's latest patents include an engineered structure for solid-state light emitters. This innovative design comprises multiple layers of alternating active and buffer materials situated between AC or DC electrodes, which generate an electric field. The active layers contain luminescent centers, such as group IV semiconductor nanocrystals, embedded in a host matrix like silicon dioxide or silicon nitride. The buffer layers are crafted from wide bandgap semiconductors or dielectric materials, ensuring that electrons passing through gain sufficient energy to excite the luminescent centers in the adjacent active layer, thereby emitting light efficiently at a desired wavelength.

Another notable patent is the engineered structure for high brightness solid-state light emitters. This electroluminescent light-emitting structure consists of one or more active layers containing rare earth luminescent centers in a host matrix. The design allows for the emission of light at specific colors or wavelengths, facilitated by electrodes that apply an electric field and inject current for excitation. The host matrix is typically a dielectric material that includes rare earth luminescent centers, such as rare earth doped silicon dioxide or silicon nitride. The structure is designed to enable efficient impact excitation, with drift layers adjacent to each active layer tailored to the respective excitation energy.

Career Highlights

Throughout his career, Iain D Calder has worked with notable companies, including Northern Telecom Limited and Group IV Semiconductor, Inc. His work has significantly impacted the development of solid-state lighting technologies.

Collaborations

Calder has collaborated with esteemed colleagues, including George Chik and Hussein M Naguib, contributing to advancements in the field of light emission.

Conclusion

Iain D Calder's innovative work in solid-state light emitters has led to numerous patents and advancements in lighting technology. His contributions continue to influence the industry and pave the way for future innovations.