Prof. Michael D. McGehee
Assistant Professor at Stanford Univ
SPIE Involvement:
Author | Instructor
Publications (7)

Proceedings Article | 18 September 2018 Presentation
Proc. SPIE. 10759, New Concepts in Solar and Thermal Radiation Conversion and Reliability
KEYWORDS: Oxides, Solar cells, Indium, Scanning electron microscopy, Thin film solar cells, Transparent conductors, Fullerenes, Lead, Tin, Perovskite

Proceedings Article | 19 September 2017 Presentation
Proc. SPIE. 10363, Organic, Hybrid, and Perovskite Photovoltaics XVIII
KEYWORDS: Oxides, Glasses, Solar cells, Silicon solar cells, Atomic layer deposition, Bromine, Heterojunctions, Tandem solar cells, Lead, Tin

Proceedings Article | 17 August 2014 Paper
Proc. SPIE. 9165, Physical Chemistry of Interfaces and Nanomaterials XIII
KEYWORDS: Photovoltaics, Modulation, Video, Solar cells, Molecules, Interfaces, Chemistry, Nanomaterials, Current controlled current source

Proceedings Article | 4 September 2009 Paper
Proc. SPIE. 7416, Organic Photovoltaics X
KEYWORDS: Carbon, Magnesium, Titanium dioxide, Solar cells, X-rays, Coating, Profiling, Absorption spectroscopy, Photoemission spectroscopy, Solid state electronics

Proceedings Article | 11 September 2008 Paper
Proc. SPIE. 7047, Nanoscale Photonic and Cell Technologies for Photovoltaics
KEYWORDS: Nanostructures, Photovoltaics, Nanostructuring, Titanium dioxide, Polymers, Particles, Solar cells, Silicon, Heterojunctions, Nanolithography

Showing 5 of 7 publications
Course Instructor
SC797: The Science and Technology of Organic Solar Cells
Solar cells made from organic semiconductors are very attractive because they can potentially be made at very low cost in roll-to-roll coating machines. This tutorial will start with an introduction to organic semiconductors that will explain why conjugated molecules can be semiconductors, what determines their absorption spectrum, how molecular packing affects the charge carrier mobility and how they are used to make transistors, light-emitting diodes and solar cells. Then the various designs that have been used to make organic solar cells- single semiconductor, planar heterojunctions, bulk heterojunctions and tandems- will be covered. All of the important processes that occur in the cells will be addressed, including: • optical interference and light absorption • exciton diffusion and energy transfer • forward and back electron transfer (exciton splitting and recombination) • charge transport Device modeling and prospects for raising the efficiency from the current level of 5 % to 20 % will be discussed.
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