Artificial Photosynthesis Lab

Edri Lab @ Department of Chemical Engineering, BGU

Why lead methylammonium tri-iodide perovskite-based solar cells require a mesoporous electron transporting scaffold (but not necessarily a hole conductor)

Eran Edri, Saar Kirmayer, Alex Henning, Sabyasachi Mukhopadhyay, Konstantin Gartsman, Yossi Rosenwaks, Gary Hodes, David Cahen

CH3NH3PbI3-based solar cells were characterized with electron beam-induced current (EBIC) and compared to CH 3NH3PbI3-xClx ones. A spatial map of charge separation efficiency in working cells shows p-i-n structures for both thin film cells. Effective diffusion lengths, LD, (from EBIC profile) show that holes are extracted significantly more efficiently than electrons in CH3NH3PbI3, explaining why CH 3NH3PbI3-based cells require mesoporous electron conductors, while CH3NH3PbI3-xCl x ones, where LD values are comparable for both charge types, do not.

Publication language English
Pages 1000-1004
Journal Nano Letters
Volume 14
Issue number 2
Publication status Published - 12.02.2014

Keywords

electron beam induced current
organic-inorganic lead halide
Perovskite solar cell
photovoltaic
scanning kelvin probe force microscopy

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering
Access to Document
10.1021/nl404454h
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Link to publication in Scopus