111/06/15 1 Optical Absorption Enhancement in Silicon Nanohole Arrays for Solar Photovoltaics Reporter: Bo-Yu Huang Advisor: Peichen Yu Green Phtonics Lab., National Chiao Tung University 111/06/15 1 Sang Eon Han and Gang Chen* Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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Optical Absorption Enhancement in Silicon Nanohole Arrays for Solar Photovoltaics
Optical Absorption Enhancement in Silicon Nanohole Arrays for Solar Photovoltaics. Sang Eon Han and Gang Chen* Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139. Reporter: Bo-Yu Huang Advisor: Peichen Yu - PowerPoint PPT Presentation
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112/04/19 1
Optical Absorption Enhancement in SiliconNanohole Arrays for Solar Photovoltaics
Reporter: Bo-Yu HuangAdvisor: Peichen Yu
Green Phtonics Lab., National Chiao Tung University
112/04/19 1
Sang Eon Han and Gang Chen*Department of Mechanical Engineering, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139
NCTU IEO GPLab
Outline
Introduction Nanorod arrays Nanohole arrays
Simulation & Discussion
Summary
NCTU IEO GPLab
Introduction
Poor infrared absorption of crystalline silicon (indirect band gap)
200-300 µm c-Si active layers that absorb light efficiently This thickness accounts for 40% of the total cost∼
An effective technique for light trapping in thin active layers needs to be developed
NCTU IEO GPLab
Introduction
Nanorod arrays Construct a p-n or a p-i-n junction in the radial direction of
each nanorod Shorten the carrier diffusion length Anti-reflection
NCTU IEO GPLab
Introduction
Nanohole arrays We find that nanohole arrays are comparable to or
even better than nanorod arrays in terms of light absorption.