Effective Light Management in Thin Silicon Wafers

Chapter

Abstract

Crystalline silicon (c-Si)-based photovoltaics have dominated the global market share over the past decade. To progress toward utility-scale adoption, cost reduction plans are necessary, in which one option is to reduce the silicon material used. This comes at a cost of lower photo-absorption and generation, particularly for near-infrared photons due to their much higher absorption depth as compared to short-wavelength photons. In this chapter, the different methods to enhance light trapping for near-infrared photons are mentioned, and in particular the methodology on the proper design of a one-dimensional conductive distributed Bragg reflector (DBR) scheme is introduced. Both experimental and simulation results in this chapter consistently demonstrate the feasibility of integrating a conductive DBR scheme at the rear of a heterojunction silicon wafer solar cell (a type of c-Si-based photovoltaics technology) for enhanced photo-generation at the target long-wavelength regions (i.e., 900 ± 200 nm). The methodology presented here can be easily extended to other target wavelengths of interest and also not limited to solar cells applications alone.

Keywords

Distributed Bragg reflectors Light trapping Silicon solar cells 

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Department of Electrical & Computer Engineering, National University of SingaporeSolar Energy Research Institute of SingaporeSingaporeSingapore

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