News Column

Recent Findings from Weizmann Institute of Science Has Provided New Information about General Science

May 30, 2014

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Science. According to news reporting originating from Rehovot, Israel, by NewsRx correspondents, research stated, "Developments in organic-inorganic lead halide-based perovskite solar cells have been meteoric over the last 2 years, with small-area efficiencies surpassing 15%. We address the fundamental issue of how these cells work by applying a scanning electron microscopy-based technique to cell cross-sections."

Our news editors obtained a quote from the research from the Weizmann Institute of Science, "By mapping the variation in efficiency of charge separation and collection in the cross-sections, we show the presence of two prime high efficiency locations, one at/near the absorber/hole-blocking-layer, and the second at/near the absorber/electron-blocking-layer interfaces, with the former more pronounced. This 'twin-peaks' profile is characteristic of a p-i-n solar cell, with a layer of low-doped, high electronic quality semiconductor, between a p-and an n-layer."

According to the news editors, the research concluded: "If the electron blocker is replaced by a gold contact, only a heterojunction at the absorber/hole-blocking interface remains."

For more information on this research see: Elucidating the charge carrier separation and working mechanism of CH3NH3PbI3-xClx perovskite solar cells. Nature Communications, 2014;5():428-435. Nature Communications can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group -; Nature Communications -

The news editors report that additional information may be obtained by contacting E. Edri, Weizmann Inst Sci, Fac Chem, Dept. of Chem Res Support, IL-76100 Rehovot, Israel. Additional authors for this research include S. Kirmayer, S. Mukhopadhyay, K. Gartsman, G. Hodes and D. Cahen (see also Science).

Keywords for this news article include: Asia, Israel, Rehovot, Science

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Source: Science Letter

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