Document Detail


Supramolecular Halogen Bond Passivation of Organic-Inorganic Halide Perovskite Solar Cells.
MedLine Citation:
PMID:  24787646     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Organic-inorganic halide perovskites, such as CH3NH3 Pb X3 (X = I-, Br-, Cl-), are attracting growing interest to prepare low cost solar cells that are capable of converting sun light to electricity at the highest efficiencies. Despite negligible effort on enhancing materials purity, or passivation of surfaces, high efficiencies have already been achieved. Here, we show that trap states at the perovskite surface generate charge accumulation and consequent recombination losses in working solar cells. We identify that under-coordinated iodine ions within the perovskite structure are responsible and make use of supramolecular halogen bond complexation to successfully passivate these sites. Following this strategy we demonstrate solar cells with maximum power conversion efficiency of 15.7% and stable power output over 15% under constant 0.81 V forward bias in simulated full sun light. The surface passivation introduces an important direction for future progress in perovskite solar cells.
Authors:
Antonio Abate; Michael Saliba; Derek J Hollman; Samuel David Stranks; Konrad Wojciechowski; Roberto Avolio; Giulia Grancini; Annamaria Petrozza; Henry J Snaith
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-5-1
Journal Detail:
Title:  Nano letters     Volume:  -     ISSN:  1530-6992     ISO Abbreviation:  Nano Lett.     Publication Date:  2014 May 
Date Detail:
Created Date:  2014-5-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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