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Inkjet Printing and Instant Chemical Transformation of a CH 3 NH 3 PbI 3 /Nanocarbon Electrode and Interface for Planar Perovskite Solar Cells
Author(s) -
Wei Zhanhua,
Chen Haining,
Yan Keyou,
Yang Shihe
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201408638
Subject(s) - perovskite (structure) , materials science , electrode , energy conversion efficiency , solar cell , carbon fibers , planar , fabrication , perovskite solar cell , layer (electronics) , chemical engineering , optoelectronics , nanotechnology , chemistry , composite material , computer science , medicine , computer graphics (images) , alternative medicine , pathology , composite number , engineering
A planar perovskite solar cell that incorporates a nanocarbon hole‐extraction layer is demonstrated for the first time by an inkjet printing technique with a precisely controlled pattern and interface. By designing the carbon plus CH 3 NH 3 I ink to transform PbI 2 in situ to CH 3 NH 3 PbI 3 , an interpenetrating seamless interface between the CH 3 NH 3 PbI 3 active layer and the carbon hole‐extraction electrode was instantly constructed, with a markedly reduced charge recombination compared to that with the carbon ink alone. As a result, a considerably higher power conversion efficiency up to 11.60 % was delivered by the corresponding solar cell. This method provides a major step towards the fabrication of low‐cost, large‐scale, metal‐electrode‐free but still highly efficient perovskite solar cells.