An Above‐Room‐Temperature Ferroelectric Organo–Metal Halide Perovskite: (3‐Pyrrolinium)(CdCl3)1. Issue 42 (4th September 2014)

• Record Type: Journal Article
• Authors: Ye, Heng‐Yun; Zhang, Yi; Fu, Da‐Wei; Xiong, Ren‐Gen
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 42(2014)
• Page Start: 11242
• Page End: 11247
• Publication Date: 2014-09-04
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201406810
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Hybrid organo–metal halide perovskite materials, such as CH₃NH₃PbI₃, have been shown to be some of the most competitive candidates for absorber materials in photovoltaic (PV) applications. However, their potential has not been completely developed, because a photovoltaic effect with an anomalously large voltage can be achieved only in a ferroelectric phase, while these materials are probably ferroelectric only at temperatures below 180 K. A new hexagonal stacking perovskite‐type complex (3‐pyrrolinium)(CdCl₃) exhibits above‐room‐temperature ferroelectricity with a Curie temperature <italic>T</italic>_c=316 K and a spontaneous polarization <italic>P</italic>_s=5.1 μC cm⁻². The material also exhibits antiparallel 180° domains which are related to the anomalous photovoltaic effect. The open‐circuit photovoltage for a 1 mm‐thick bulky crystal reaches 32 V. This finding could provide a new approach to develop solar cells based on organo–metal halide perovskites in photovoltaic research.</p> </abstract>