Improvement of device performance of multicrystalline Si-based solar cells using multicrystalline SiGe with microscopic compositional distribution

Kazuo Nakajima, Kozo Fujiwara, Wugen Pan, Noritaka Usami, Toru Ujihara, Toetsu Shishido

Research output: Contribution to conferencePaperpeer-review

Abstract

We demonstrate that SiGe solar cells with microscopic compositional distribution could improve the conversion efficiency of the multicrystalline Si solar cells. This improvement was revealed to come from the increase of the total current by a factor of 1.2, which originates from the increase of the internal quantum efficiency at relatively longer wavelength region. The decrease of the open circuit voltage was found to be not critical to affect the overall efficiency when the average Ge composition is lower than 5%. These results imply that SiGe solar cells could be a very promising candidate for new solar cells with higher efficiency, especially when low-cost growth technologies are exploited.

Original languageEnglish
Pages1059-1065
Number of pages7
Publication statusPublished - 2004 Dec 1
EventSiGe: Materials, Processing, and Devices - Proceedings of the First Symposium - Honolulu, HI, United States
Duration: 2004 Oct 32004 Oct 8

Other

OtherSiGe: Materials, Processing, and Devices - Proceedings of the First Symposium
Country/TerritoryUnited States
CityHonolulu, HI
Period04/10/304/10/8

ASJC Scopus subject areas

  • Engineering(all)

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