Improved charge transport of Nb-doped TiO₂nanorods in methylammonium lead iodide bromide perovskite solar cells

Abstract

The phase of perovskite evolves when the non-stoichiometric mixed halide precursor is baked at different temperatures. Nb-doped TiO2nanorods are superior to plain nanorods as electron transport medium in crystallized perovskite.

N-type metal-oxide electron transport layer for mesoscopic perovskite solar cells

“…Nb doping was reported in both TiO2 nanorods and nanoparticles. Yang et al [33] fabricated Nb doped rutile TiO2 nanorods and the PSC with Nb-doped rutile nanorods had significantly improved performance, because the positively shifted flat band of Nb doped TiO2 favored electron injection. Nb doping can also improve the electron transport and collection by providing a high conductive path and better interface contact.…”

Epitaxial 1D electron transport layers for high-performance perovskite solar cells

“…This journal is © The Royal Society of Chemistry 2015 diameter 1D TiO 2 , 17,22,[24][25][26][27] which might reduce the available space for light-absorbing material. In case of single-crystalline TiO 2 nanowires (NWs) grown on conductive substrates, it seems so far difficult to simultaneously have a low packing density, and small diameter (a few tens of nm) and length (a few hundreds of nm), in spite of a number of works on it.…”

Niobium-doped titanium dioxide nanoparticles for electron transport layers in perovskite solar cells

“…Zinc-doped TiO 2 layers have also shown better electrical conductivity than in pristine TiO 2 , due to the re-arrangement in the electronic structure of TiO 2 [17,18]. Finally, a sufficient increase of electron transport parameters was observed in niobium-doped TiO 2 nanorods, used for fabrication of PSCs with improved parameters [19]. The theoretical approach describing the structure of PSCs is discussed in [20].…”