Document Detail

Mechanism of carrier accumulation in perovskite thin-absorber solar cells.
MedLine Citation:
PMID:  23900067     Owner:  NLM     Status:  In-Data-Review    
Photovoltaic conversion requires two successive steps: accumulation of a photogenerated charge and charge separation. Determination of how and where charge accumulation is attained and how this accumulation can be identified is mandatory for understanding the performance of a photovoltaic device and for its further optimization. Here we analyse the mechanism of carrier accumulation in lead halide perovskite, CH3NH3PbI3, thin-absorber solar cells by means of impedance spectroscopy. A fingerprint of the charge accumulation in high density of states of the perovskite absorber material has been observed at the capacitance of the samples. This is, as far as we know, the first observation of charge accumulation in light-absorbing material for nanostructured solar cells, indicating that it constitutes a new kind of photovoltaic device, differentiated from sensitized solar cells, which will require its own methods of study, characterization and optimization.
Hui-Seon Kim; Ivan Mora-Sero; Victoria Gonzalez-Pedro; Francisco Fabregat-Santiago; Emilio J Juarez-Perez; Nam-Gyu Park; Juan Bisquert
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Nature communications     Volume:  4     ISSN:  2041-1723     ISO Abbreviation:  Nat Commun     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-07-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101528555     Medline TA:  Nat Commun     Country:  England    
Other Details:
Languages:  eng     Pagination:  2242     Citation Subset:  IM    
School of Chemical Engineering and Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Korea.
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