Efficiency dispersion in production of crystalline-Si solar cells by numerical simulation

Laidong Wang, Haifeng Zhang, Wen Cheng Sun, Meng Tao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Efficiency dispersion in crystalline-Si solar cells is a major contributor to the high cost of Si PV systems. A comprehensive sensitivity analysis for efficiency dispersion in the production of crystalline-Si solar cells is presented based on numerical simulations. Various process variables are considered, including temperature variation in the diffusion furnace, wafer resistivity and finger electrode width. The simulation provides a quantitative estimation for efficiency variation due to each of these process variables. It is suggested that temperature variations in the diffusion furnace are the biggest cause for efficiency dispersion, when a 60°C temperature variation results in an efficiency drop of almost 6% absolute. To understand the effect of diffusion temperature, factors related to diffusion such as contact resistivity, emitter resistance and emitter recombination are also investigated to reveal their individual effect on cell efficiency. Resistive losses in the emitter are primarily responsible for the efficiency variation. Remedies for efficiency dispersion are proposed.

Original languageEnglish (US)
Title of host publication2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479979448
DOIs
StatePublished - Dec 14 2015
Event42nd IEEE Photovoltaic Specialist Conference, PVSC 2015 - New Orleans, United States
Duration: Jun 14 2015Jun 19 2015

Other

Other42nd IEEE Photovoltaic Specialist Conference, PVSC 2015
CountryUnited States
CityNew Orleans
Period6/14/156/19/15

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Keywords

  • diffusion temperature
  • efficiency dispersion
  • efficiency uniformization
  • emitter resistance
  • silicon solar cell

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Wang, L., Zhang, H., Sun, W. C., & Tao, M. (2015). Efficiency dispersion in production of crystalline-Si solar cells by numerical simulation. In 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015 [7355740] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2015.7355740