Terpyridine-derived perovskite single crystals with tunable structures and electronic dimensionality

Abstract

Terpyridine-derived perovskite single crystals displaying tunable low-dimensional structures and outstanding optoelectronic performances suitable for device applications have been developed.

Highly Luminescent One‐Dimensional Organic–Inorganic Hybrid Double‐Perovskite‐Inspired Materials for Single‐Component Warm White‐Light‐Emitting Diodes

“…The formation of organic‐inorganic octahedra is attributed to the stronger chemical binding of K + to F − comparison to Br − . Similar organic‐organic octahedra formation was seen in (C 15 H 10 N 6 ) 4 Pb 5 I 18 , where part of the Pb−I bonds in [PbI 6 ] 4− octahedron were replaced by Pb−N bonds [8] …”

“…Similar organic-organic octahedra formation was seen in (C 15 H 10 N 6 ) 4 Pb 5 I 18 , where part of the PbÀ I bonds in [PbI 6 ] 4À octahedron were replaced by PbÀ N bonds. [8] To confirm the interaction between F atom in DFPD + and K + , we measured the binding energy of F atom in (DFPD) 2 KInBr 6 by X-ray photoelectron spectroscopy (XPS). It is found that F1s XPS spectrum of the (DFPD) 2 KInBr 6 crystals has shifted by about 0.32 eV towards lower binding energy with respect to the DFPD-Br precursor (Figure 1c, Figure S2), indicating a different chemical environment from that of DFPD-Br and the presence of an additional interaction of F with K + .…”

Structurally Dimensional Engineering in Perovskite Photovoltaics

“…At the same time, we calculate that the bandgaps of Tpy 4 Pb 5 I 18 and Tpy 2 Pb 3 I 6 are 1.58 eV and 1.57 eV, respectively. [ 61 ] Gassara et al. synthesized 1D perovskite, (C 6 H 7 NBr) 3 [CdBr 5 ], and calculated DFT, and obtained that the indirect bandgap of the perovskite is 3.16 eV.…”

Regulating the Intermolecular Hydrogen Bond to Realize Directional Dimension Reduction of Lead Iodide Perovskite toward Low-Dimensional Photovoltaics

“…It is found that with an increase in the alkyl chain length, the phase distribution of 2D perovskite crystals becomes disordered and the orientation decreases . A series of new perovskite single crystals has been grown by Yuan et al, 0D Tpy 2 PbI 6 , 1D Tpy 4 Pb 5 I 18 , and 1D Tpy 2 Pb 3 I 6 , derived from terpyridine by regulating the proportion of the components . Xing et al.…”

“…23 A series of new perovskite single crystals has been grown by Yuan et al, 0D Tpy 2 PbI 6 , 1D Tpy 4 Pb 5 I 18 , and 1D Tpy 2 Pb 3 I 6 , derived from terpyridine by regulating the proportion of the components. 24 Xing et al used a large volume of 2-(methylthio) ethylamine hydrochloride (MTEACl) to prepare a low-dimensional perovskite layer. Owing to the S−S interaction between sulfur atoms of MTEA molecules, the charge transport and stability of the perovskite framework have been enhanced.…”