15:05 〜 15:20
▲ [23p-D114-9] Optoelectrical characterization of Chiral Organic-inorganic Hybrid Perovskites
キーワード：perovskite, chirality, second harmonic generation
Chirality is a fundamental definition describing objects that cannot be superimposed on its mirror image, and is a very significant concept in chemistry and biology. In chiral molecules, the physical differences between a pair of enantiomers are almost neglectable, but they can make a significant difference to particular properties, such as the interaction with other chiral materials or the response to circularly polarized light. In the field of electrical engineering, the magnetic field is an axial vector and is expected to be closely related to chirality.
In this presentation, the "chirality" was introduced into the organic-inorganic hybrid perovskites (PVK) to discover the relationship between chirality and material’s optoelectrical properties. Electromagnetic properties such as photocurrent response were measured for chiral PVK to evaluate the corresponding effects initiated by the introducing induction of chirality. Second harmonic generation circular dichroism (SHGCD) measurement was employed for characterizing the chirality of samples shown in Fig 1. The chiral photoelectric response of the chiral perovskite was evaluated by photocurrent measurement excited with 450 nm laser.
SHG image were taken from small PVK crystals using left and right circularly polarized light (CPL), and the intensity difference between L-SHG and R-SHG was clearly reversed for S- and R+ PVK, indicating that S- and R+ samples show opposite responses to CPL. In order to investigate the electrical properties of the chirality, the photocurrent induced by the chiral light source was measured for the S- and R+ PVK samples [1]. As shown in Fig 2, the photoelectrical responses of the S- and R+ samples under incident left- and right-handed polarized light show the same trend, but the magnitudes are reversed, which clearly indicates the chiral sensing function of the chiral perovskite. This guarantees the chiral sensing function for the chiral perovskites in future applications.
In this presentation, the "chirality" was introduced into the organic-inorganic hybrid perovskites (PVK) to discover the relationship between chirality and material’s optoelectrical properties. Electromagnetic properties such as photocurrent response were measured for chiral PVK to evaluate the corresponding effects initiated by the introducing induction of chirality. Second harmonic generation circular dichroism (SHGCD) measurement was employed for characterizing the chirality of samples shown in Fig 1. The chiral photoelectric response of the chiral perovskite was evaluated by photocurrent measurement excited with 450 nm laser.
SHG image were taken from small PVK crystals using left and right circularly polarized light (CPL), and the intensity difference between L-SHG and R-SHG was clearly reversed for S- and R+ PVK, indicating that S- and R+ samples show opposite responses to CPL. In order to investigate the electrical properties of the chirality, the photocurrent induced by the chiral light source was measured for the S- and R+ PVK samples [1]. As shown in Fig 2, the photoelectrical responses of the S- and R+ samples under incident left- and right-handed polarized light show the same trend, but the magnitudes are reversed, which clearly indicates the chiral sensing function of the chiral perovskite. This guarantees the chiral sensing function for the chiral perovskites in future applications.