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Title: Trap passivation and efficiency improvement of perovskite solar cells by a guanidinium additive
Authors: Jiaxu Yao
Hui Wang
Pang Wang
Robert S. Gurney
Akarin Intaniwet
Pipat Ruankham
Supab Choopun
Dan Liu
Tao Wang
Keywords: Materials Science
Issue Date: 1-Jul-2019
Abstract: © 2019 the Partner Organisations. A photoactive layer with efficient charge transport and low charge recombination is critical to prepare perovskite solar cells with high efficiency and superior stability. We demonstrate that the incorporation of an effective additive 1,3-diaminoguanidine monohydrochloride (DAGCl) in the MAPbI3 film can increase the perovskite grain size and reduce trap density, consequently increasing the carrier lifetime and reducing charge recombination. This leads to an improvement in maximum power conversion efficiency from 19.1% to 20.3% as well as increased lifetime, with an inverted device structure of glass/ITO/PolyTPD/MAPbI3/PC61BM/ZrAcac/Ag.
ISSN: 20521537
Appears in Collections:CMUL: Journal Articles

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