Indolocarbazole-core linked triphenylamine as an interfacial passivation layer for perovskite solar cells

Abstract

Two P-type organic molecules containing indolocarbazole and methoxy (or methylthio) substituted triphenylamine are designed and synthesized as interface layers to passivate surface defects and meanwhile protect perovskite films from water.

Functionalized Rare-Earth Metal Cluster-Based Materials as Additives for Enhancing the Efficiency of Perovskite Solar Cells

“…The PCE of the Tb-FTZB modified device was higher than that of devices doped with Tb-TZB. This may be due to the formation of hydrogen bonds between the fluorine atoms of Tb-FTZB and methylamine/formamidine at the interface. − In addition, the PCE values of the H 2 TZB- and H 2 FTZB-modified champion devices were 20.73 and 20.90%, respectively (Figure S10), and the detailed photovoltaic parameters are shown in Table S1. Although the modification of the ligand small molecules improved the PCE of the devices compared to that of the control devices (19.44%), it was still lower than that of the corresponding Tb-MOF-modified devices, which implied that the three-dimensional (3D) MOF framework structure enabled an ordered arrangement of organic ligands, exposing more electron-rich N, O, and F sites and enhancing the passivation effect on uncoordinated Pb 2+ .…”

Multifunctional Cross-Linked Hole Transporting Interfacial Layer for Efficient and Stable Perovskite Solar Cells

“…Nevertheless, the endeavors are still in the absence of the inhibition of Li + diffusion . Catering for all the concerns above, Wang and Liu et al respectively introduced indolocarbazole-core linked triphenylamine small molecules and a two-dimensional conjugated polymer (2DP-O), both of which integrated passivate surface defects, help extract and transport hole carriers, impede water intrusion, and hinder the Li + diffusion into the perovskite. However, the polymers or small-molecule passivating materials are vulnerable to the chlorobenzene (CB) solvent during the subsequent preparation of HTL, which leads to poor interfacial contact of PSCs.…”

A highly efficient interface hole transporting tunnel by a bipyridine semiconductor for perovskite solar cells

“…Besides the optimization of the energy levels, minimizing the undesired defects of perovskite film is equally crucial to restrict charge recombination. At present, various defect passivating agents, such as polymers, [17][18][19] small molecules, [20][21][22][23] and organic/inorganic salts [24][25][26] have been extensively investigated for PSCs. In particular, pyridine and thiophene-based organic small molecules, which contain electron-rich nitrogen/sulfur atoms, are effective for interacting with uncoordinated Pb 2+ to restrict charge recombination.…”