Pyrrolidinium lead iodide from crystallography: a new perovskite with low bandgap and good water resistance

Abstract

A new perovskite pyrrolidinium lead iodide shows suitable bandgap and good moisture stability.

Polarization-enhanced photoelectric performance in a molecular ferroelectric hexane-1,6-diammonium pentaiodobismuth (HDA-BiI5)-based solar device

“…Thus, HDA-BiI 5 exhibited much more stability contrasting to the other organic-inorganic hybrid solar cells, such as MAPbI 3 which was quickly degraded and completely lost performance within several hours due to the hygroscopic nature of the methyl ammonium in a wet environment. 44 The excellent stability of HDA-BiI 5 should be attributed to the small size of Bi 3+ which constructed a relatively stable crystal lattice. 45 This strategy for stabilizing the crystal lattice by replacing lead with chemically similar and suitable size atoms opened a promising route to prepare the molecular ferroelectric materials with good stability.…”

From 1D to 3D: Fabrication of CH3NH3PbI3 Perovskite Solar Cell Thin Films from (Pyrrolidinium)PbI3 via Organic Cation Exchange Approach

“…The PbI 3 − anion chains are linked to each other by pyridinium cations through short contacts between the H atom attached to the pyrrolidinium N atom and the I1 atom or the I2 atom. The PbI 3 − chain–chain distance in the bc plane is 8.944 Å, which is a little smaller than that in the another crystal form of (pyrrolidinium)MnBr 3 (9.312 Å) . Notably, the latter's pyridinium cation is seriously disordered …”

“…The PbI 3 − chain–chain distance in the bc plane is 8.944 Å, which is a little smaller than that in the another crystal form of (pyrrolidinium)MnBr 3 (9.312 Å) . Notably, the latter's pyridinium cation is seriously disordered …”

“…More details of the synthesis are provided in the Supporting Information (S4). Single‐crystal diffraction experiments reveal that this is a new crystal form of (pyrrolidinium)PbI 3 (orthorhombic phase), and its unit cell parameters are completely different from those of another crystal form (hexagonal phase) recently reported in the literature . Figure shows the packing diagram of the (pyrrolidinium)PbI 3 single crystal.…”

Ethylammonium Lead Iodide Formation in MAPbI3 Precursor Solutions by DMF Decomposition and Organic Cation Exchange Reaction

“…While such record performance seems to be inspiring for renewable energy development, the device lifetime, especially under moisture environment, remains at a low level, which prevents its commercialization. The devices usually degrade within a day unless an extra encapsulation layer is adopted [5][6][7], and even with the encapsulation layer the longest lifetime reported is still less than 4000 hours, which is far from enough for commercialization [8][9][10].…”