Hybrid organic–inorganic perovskite ferroelectrics bring light to semiconducting applications: Bandgap engineering as a starting point

Abstract

Ferroelectrics are attractive due to their great application potential in information storage, optoelectronics, spintronics and sensing. As an important characteristic affecting semiconducting applications, the energy band structure is important for the development of light-emitting devices. Although it is a tremendous challenge to tune the bandgap in inorganic ferroelectric materials due to the strict requirement of structural symmetry for the fragile ferroelectricity, hybrid organic–inorganic perovskite (HOIP) ferroelectrics, which have a flexible structure, provide a new method to optimize the ferroelectric performance and bandgap. Based on the overview of methods for designing ferroelectrics, this Perspective systematically provides in-depth insight into the relationships between the structure–property and bandgap of HOIP ferroelectrics. In addition, we discussed the challenges and directions of HOIP ferroelectrics in semiconducting applications for the future.

First-principles study of (CsMA)NaSbX6 (MA = methylammonium; X = Cl, Br, I) organic–inorganic hybrid double perovskites for optoelectronic applications

“…From Table 1, it can be inferred that the bandgap energy increases with reducing lattice constants in accordance with the observation by (Greenman, Williams, & Kioupakis, 2019; Roknuzzaman et al, 2017) that the replacement of halogen atom (X) by a lighter and smaller halogen atom reduces the lattice parameter. Generally, the halogens increasing in atomic size down the group in Periodic Table (Kragh, 1963;Yao et al, 2021) and as such, increasing the halide concentration results in decrease of the bandgap energy.…”

Anions Distorting Triggering Ferroelectricity in a Molecular Crystal†

“…[ 11‐17 ] Recently, molecular ferroelectrics have made significant progress in synthetic methods and performance improvements. [ 18‐23 ] Xiong et al . reported a series of molecular ferroelectrics such as TMCM‐MnCl 3 , [ 24 ] DIPAB, [ 25 ] MDABCO–NH 4 I 3 [ 26 ] and (TMFM) x (TMCM) 1– x CdCl 3 [ 27 ] to achieve or partially exceed the performance of inorganic ferroelectrics.…”

The Future of Hybrid and Inorganic Perovskite Materials: Technology Forecasting

“…The important characteristics of organic‐inorganic PSKs such as ambipolar charge transport, high mobility, low binding energy, [ 99 ] high dielectric constant, [ 100 ] and ferroelectric polarization, [ 101 ] enable them a superior prospect for the development of future optoelectronic devices. Furthermore, this category of materials has several advantages such as solution‐processability and low cost in comparison to crystalline silicon and III–V semiconductors.…”