Modified NiOx nanoparticles (NPs) developed via surface engineering are applied to a hole transport layer (HTL) in n-i-p-structured perovskite solar cells (PSCs). Hexanoic acid (HA) as a surfactant improves the dispersibility of NiOx NPs in chlorobenzene (CB). The conductivity of the NiOx-HA film is 1.20x10-5S cm-1, which is superior to that of 2,2 ',7,7 '-tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9 '-spirobifluorene (spiro-OMeTAD) with dopants. The NiOx-HA film shows better hole extraction properties compared with the pristine NiOx film. The NiOx-HA NPs form closely packed and pinhole-free films, leading to improved device performance with a power conversion efficiency from 5.5% to 13.1%.
Mounir Driss Mensi, Masaud Hassan S Almalki, Anwar Qasem M Alanazi
Michael Graetzel, Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Peng Wang, Ming Ren
Paul Joseph Dyson, Ursula Röthlisberger, Felix Thomas Eickemeyer, Lukas Pfeifer, Virginia Carnevali, Nikolaos Lempesis, Lorenzo Agosta, Masaud Hassan S Almalki, Haizhou Lu, Yeonju Kim, Jaeki Jeong