Optimization of front TCO layer of silicon heterojunction solar cells for tandem applications

Mehdi Leilaeioun, Zhengshan Yu, Zachary Holman

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

Abstract

The front transparent conductive oxide (TCO) layers of silicon heterojunction solar cells need to be optimized electrically and optically to minimize losses due to sheet resistance and free carrier absorption. This optimization has already investigated for the wavelength range of 300-1100 nm, but not for the projected wavelength range of 700-1100 nm for a silicon cell that is applied in a tandem structure as the bottom cell. Here, we demonstrate a routine for determining the total loss associated with the front TCO layer and employ it to determine which carrier density, mobility, and finger pitch combinations minimize loss. For a representative ITO film with a mobility of approximately 20 cm2/Vs and a carrier density of approximately 2.5x1020 cm-3, the total loss over the wavelength range of 700-1100 nm is minimized by using a finger spacing of 3 mm and ITO thickness of 100-110 nm.

Original languageEnglish (US)
Title of host publication2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-4
Number of pages4
ISBN (Electronic)9781509056057
DOIs
StatePublished - May 25 2018
Event44th IEEE Photovoltaic Specialist Conference, PVSC 2017 - Washington, United States
Duration: Jun 25 2017Jun 30 2017

Other

Other44th IEEE Photovoltaic Specialist Conference, PVSC 2017
CountryUnited States
CityWashington
Period6/25/176/30/17

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Leilaeioun, M., Yu, Z., & Holman, Z. (2018). Optimization of front TCO layer of silicon heterojunction solar cells for tandem applications. In 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017 (pp. 1-4). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2017.8366090