Elucidating the charge carrier separation and working mechanism of CH3NH3PbI3−xCl x perovskite solar cells. Edri, E., Kirmayer, S., Mukhopadhyay, S., Gartsman, K., Hodes, G., & Cahen, D. Nature Communications, 5(1):3461, 12, 2014.
Elucidating the charge carrier separation and working mechanism of CH3NH3PbI3−xCl x perovskite solar cells [link]Website  abstract   bibtex   
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. 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. If the electron blocker is replaced by a gold contact, only a heterojunction at the absorber/hole-blocking interface remains. © 2014 Macmillan Publishers Limited. All rights reserved.
@article{
 title = {Elucidating the charge carrier separation and working mechanism of CH3NH3PbI3−xCl x perovskite solar cells},
 type = {article},
 year = {2014},
 identifiers = {[object Object]},
 pages = {3461},
 volume = {5},
 websites = {http://www.nature.com/articles/ncomms4461},
 month = {12},
 day = {11},
 id = {8dab67fe-de35-3453-9ce3-7ad9f55170c2},
 created = {2017-06-20T20:40:32.426Z},
 file_attached = {false},
 profile_id = {eb79b202-fabf-3fa0-abc2-227ae10306c6},
 last_modified = {2018-10-04T09:24:45.776Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {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. 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. If the electron blocker is replaced by a gold contact, only a heterojunction at the absorber/hole-blocking interface remains. © 2014 Macmillan Publishers Limited. All rights reserved.},
 bibtype = {article},
 author = {Edri, Eran and Kirmayer, Saar and Mukhopadhyay, Sabyasachi and Gartsman, Konstantin and Hodes, Gary and Cahen, David},
 journal = {Nature Communications},
 number = {1}
}

Downloads: 0