Chiral three-dimensional organic-inorganic lead iodide hybrid semiconductors.

Chiral hybrid metal halides (CHMHs) have received a considerable amount of attention in chiroptoelectronics, spintronics, and ferroelectrics due to their superior optoelectrical properties and structural flexibility. Owing to limitations in synthesis, the theoretical prediction of room-temperature stable chiral three-dimensional (3D) CHFClNH 3 PbI 3 has not been successfully prepared, and the optoelectronic properties of such structures cannot be studied. Herein, we have successfully constructed two pairs of chiral 3D lead iodide hybrids ( R / S / Rac -3AEP)Pb 2 I 6 (3 R / S / Rac , 3AEP = 3-(1-aminoethyl)pyridin-1-ium) and ( R / S / Rac -2AEP)Pb 2 I 6 (2 R / S / Rac , 2AEP = 2-(1-aminoethyl)pyridin-1-ium) through chiral introduction and ortho substitution strategies, and obtained bulk single crystals of 3 R / S / Rac . The 3 R / S exhibits optical activity and bulk photovoltaic effect induced by chirality. The 3 R crystal device exhibits stable circularly polarized light performance at 565 nm with a maximum anisotropy factor of 0.07, responsivity of 0.25 A W -1 , and detectivity of 3.4 × 10 12 jones. This study provides new insights into the synthesis of chiral 3D lead halide hybrids and the development of chiral electronic devices.