An efficiency of 18.88% in selective emitter solar cells by metal pattern optimization

Dong Joon Oh, Ji Myung Shim, Kyeong Yeon Cho, Eun Joo Lee, Hyun Woo Lee, Jun Young Choi, Ji Sun Kim, Jeong Eun Shin, Ji Hyun Kong, Jae Keun Seo, Soo Hong Lee, Haeseok Lee

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

Abstract

A high efficiency (η∼18.88 %) mono-crystalline Si solar cell (Area=15.6 × 15.6 cm 2) with a selective emitter structure used in the conventional diffusion process (POCl3) and the screen printed contact is presented in this paper. In particular, we focus on the improvement of fill factor (FF) by the front metal Ag portion and aspect ratio optimization. As a result, the front metal portion of 5.15% (printing thrice) represents the best in the FF of 77.68%. The fabricated solar cell with a selective emitter has the portion of high doping concentration (30 ohm/sq.) to just below the metal contact and the shallow emitter (80 ∼ 90 ohm/sq.) of the rest of contacts. As a result, our selective emitter solar cell is accomplished by the Eff 18.88% when the front metal portion of 5.15% is applied during its printing thrice.

Original languageEnglish
Title of host publicationProgram - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011
Pages2189-2192
Number of pages4
DOIs
Publication statusPublished - 2011 Dec 1
Externally publishedYes
Event37th IEEE Photovoltaic Specialists Conference, PVSC 2011 - Seattle, WA, United States
Duration: 2011 Jun 192011 Jun 24

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Other

Other37th IEEE Photovoltaic Specialists Conference, PVSC 2011
CountryUnited States
CitySeattle, WA
Period11/6/1911/6/24

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ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

Oh, D. J., Shim, J. M., Cho, K. Y., Lee, E. J., Lee, H. W., Choi, J. Y., Kim, J. S., Shin, J. E., Kong, J. H., Seo, J. K., Lee, S. H., & Lee, H. (2011). An efficiency of 18.88% in selective emitter solar cells by metal pattern optimization. In Program - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011 (pp. 2189-2192). [6186391] (Conference Record of the IEEE Photovoltaic Specialists Conference). https://doi.org/10.1109/PVSC.2011.6186391