Trap passivation and efficiency improvement of perovskite solar cells by a guanidinium additive
作者： Jiaxu Yao , Hui Wang , Pang Wang , Robert S. Gurney , Akarin Intaniwet
DOI: 10.1039/C9QM00112C
关键词: Optoelectronics 、 Energy conversion efficiency 、 Photoactive layer 、 Recombination 、 Grain size 、 Passivation 、 Materials science 、 Perovskite (structure) 、 Maximum power principle 、 Carrier lifetime
摘要: A photoactive layer with efficient charge transport and low recombination is critical to prepare perovskite solar cells high efficiency superior stability. We demonstrate that the incorporation of an effective additive 1,3-diaminoguanidine monohydrochloride (DAGCl) in MAPbI3 film can increase grain size reduce trap density, consequently increasing carrier lifetime reducing recombination. This leads improvement maximum power conversion from 19.1% 20.3% as well increased lifetime, inverted device structure glass/ITO/PolyTPD/MAPbI3/PC61BM/ZrAcac/Ag.
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