Degradation of optoelectronic properties of semiconductors by biofluids and mitigation by polymer overlayers

Paul Lee Gourley; Robert Guild Copeland; Jimmy D. Cox; Judy Kay Hendricks; Anthony E. McDonald; Sophie L. Peterson; Darryl Y. Sasaki

doi:10.1117/12.472101

21 June 2002 Degradation of optoelectronic properties of semiconductors by biofluids and mitigation by polymer overlayers

Paul Lee Gourley, Robert Guild Copeland, Jimmy D. Cox, Judy Kay Hendricks, Anthony E. McDonald, Sophie L. Peterson, Darryl Y. Sasaki

Author Affiliations +

Proceedings Volume 4626, Biomedical Nanotechnology Architectures and Applications; (2002) https://doi.org/10.1117/12.472101
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

Abstract

We are investigating optoelectronic properties of integrated structures comprising semiconductor light-emitting materials for optical probes of microscopic biological systems. Compound semiconductors are nearly ideal light emitters for probing cells and other microorganisms because of their spectral match to the transparency wavelengths of biomolecules. Unfortunately, the chemical composition of these materials is incompatible with the biochemistry of cells and related biofluids. To overcome these limitations, we are investigating functionalized semiconductor surfaces and structures to simultaneously enhance light emission and flow of biological fluids in semiconductor micro cavities. We have identified several important materials problems associated with the semiconductor/biosystem interface. One is the biofluid degradation of electroluminescence by ionic diffusion into compound semiconductors. Ions that diffuse into the active region of a semiconductor light emitter can create point defects that degrade the quantum efficiency of the radiative recombination process. This paper discusses ways of mitigating these problems using materials design and surface chemistry.

Citation Download Citation

Paul Lee Gourley, Robert Guild Copeland, Jimmy D. Cox, Judy Kay Hendricks, Anthony E. McDonald, Sophie L. Peterson, and Darryl Y. Sasaki "Degradation of optoelectronic properties of semiconductors by biofluids and mitigation by polymer overlayers", Proc. SPIE 4626, Biomedical Nanotechnology Architectures and Applications, (21 June 2002); https://doi.org/10.1117/12.472101

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KEYWORDS

Semiconductors

Ions

Diffusion

Sodium

Compound semiconductors

Polymers

Potassium

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