Journal Article

FZJ-2015-00873

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The origin of high efficiency in low-temperature solution-processable bilayer organometal halide hybrid solar cells

Sun, S. ; Salim, T. ; Mathews, N. ; Duchamp, M.FZJ* ; Boothroyd, C. B.FZJ* ; Xing, G. ; Sum, T. C. ; Lam, Y. M. (Corresponding Author)

2014
RSC Publ. Cambridge

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Please use a persistent id in citations: http://hdl.handle.net/2128/8294  doi:10.1039/c3ee43161d

Abstract: This work reports a study into the origin of the high efficiency in solution-processable bilayer solar cells based on methylammonium lead iodide (CH3NH3PbI3) and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM). Our cell has a power conversion efficiency (PCE) of 5.2% under simulated AM 1.5G irradiation (100 mW cm−2) and an internal quantum efficiency of close to 100%, which means that nearly all the absorbed photons are converted to electrons and are efficiently collected at the electrodes. This implies that the exciton diffusion, charge transfer and charge collection are highly efficient. The high exciton diffusion efficiency is enabled by the long diffusion length of CH3NH3PbI3 relative to its thickness. Furthermore, the low exciton binding energy of CH3NH3PbI3 implies that exciton splitting at the CH3NH3PbI3/PC61BM interface is very efficient. With further increase in CH3NH3PbI3 thickness, a higher PCE of 7.4% could be obtained. This is the highest efficiency attained for low temperature solution-processable bilayer solar cells to date.

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Contributing Institute(s):

1. Mikrostrukturforschung (PGI-5)

Research Program(s):

1. 42G - Peter Grünberg-Centre (PG-C) (POF2-42G41) (POF2-42G41)

Appears in the scientific report 2014

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Database coverage:
; ; ; Allianz-Lizenz / DFG ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 15 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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