Chirality-Dependent Circular Photogalvanic Effect in Enantiomorphic 2D Organic-Inorganic Hybrid Perovskites

Po-Jung Huang; Kouji Taniguchi; Masato Shigefuji; Takatsugu Kobayashi; Masakazu Matsubara; Takao Sasagawa; Hiroyasu Sato; Hitoshi Miyasaka

doi:10.1002/adma.202008611

Chirality-Dependent Circular Photogalvanic Effect in Enantiomorphic 2D Organic-Inorganic Hybrid Perovskites

Adv Mater. 2021 Apr;33(17):e2008611. doi: 10.1002/adma.202008611. Epub 2021 Mar 23.

Authors

Po-Jung Huang¹, Kouji Taniguchi^{1

2

3}, Masato Shigefuji⁴, Takatsugu Kobayashi⁴, Masakazu Matsubara^{4

5}, Takao Sasagawa⁶, Hiroyasu Sato⁷, Hitoshi Miyasaka^{1

2}

Affiliations

¹ Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan.
² Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
³ PRESTO, Japan Science and Technology Agency (JST), 5-3 Yonbancho, Chiyoda-ku, Tokyo, 102-8666, Japan.
⁴ Department of Physics, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan.
⁵ Center for Science and Innovation in Spintronics, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
⁶ Laboratory for Materials and Structures (MSL), Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan.
⁷ Application Laboratories, Rigaku Corporation, 3-9-12 Matsubara-cho, Akishima-shi, Tokyo, 196-8666, Japan.

PMID: 33754374
DOI: 10.1002/adma.202008611

Abstract

The control of the optoelectronic properties of 2D organic-inorganic hybrid perovskite (2D-OIHP) lead halides is an increasingly prevalent topic. Herein, the observation of the circular photogalvanic effect (CPGE) in new enantiomorphic 2D-OIHP lead iodides is reported, which are synthesized as a first OIHP-related system belonging to a chiral space group by incorporating organic chiral cations into the inorganic layers of lead iodides. The CPGE is an optoelectronic phenomenon associated with the spin-orbit coupling of heavy atoms in noncentrosymmetric systems. Owing to the CPGE, light-helicity-dependent steady photocurrents are generated without an external bias voltage under the irradiation of circularly polarized light. Furthermore, the sign reversal of the CPGE photocurrent depending on the chirality of the designed 2D-OIHP lead iodides is observed. This result indicates formation of the theoretically predicted radial spin-polarized texture in k-space of chiral systems owing to spin-momentum locking. Hence, chiral 2D-OIHP lead halides can be a promising platform for engineering opto-spintronic functionalities.

Keywords: chirality; circular photogalvanic effect; optoelectronics; perovskites; spintronics.