Volume 126, Issue 42 pp. 11424-11429
Zuschrift

An Above-Room-Temperature Ferroelectric Organo–Metal Halide Perovskite: (3-Pyrrolinium)(CdCl3)

Dr. Heng-Yun Ye

Dr. Heng-Yun Ye

Ordered Matter Science Research Center, Southeast University, Nanjing 211189 (P. R. China)

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Dr. Yi Zhang

Dr. Yi Zhang

Ordered Matter Science Research Center, Southeast University, Nanjing 211189 (P. R. China)

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Dr. Da-Wei Fu

Dr. Da-Wei Fu

Ordered Matter Science Research Center, Southeast University, Nanjing 211189 (P. R. China)

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Prof. Ren-Gen Xiong

Corresponding Author

Prof. Ren-Gen Xiong

Ordered Matter Science Research Center, Southeast University, Nanjing 211189 (P. R. China)

Ordered Matter Science Research Center, Southeast University, Nanjing 211189 (P. R. China)Search for more papers by this author
First published: 02 September 2014
Citations: 53

This work was supported by 973 project (2014CB932103) and the National Natural Science Foundation of China (21290172, 91222101 and 21371032). X.R.G. sincerely thanks Professors Li Sheng-Hui, Chen Bin, and Yuan Guo-Liang for their help with the measurement of solid-state NMR experiments, APV effects, and PFM images, respectively.

Abstract

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 Tc=316 K and a spontaneous polarization Ps=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.

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