2026-04-27 バッファロー大学（UB）
＜関連情報＞
- https://www.buffalo.edu/news/releases/2026/04/next-gen-semiconductors-that-share-lifes-handedness-just-got-more-practical.html
- https://www.nature.com/articles/s41467-026-70362-x
電荷移動状態を介したキラルペロブスカイトから分子ドーパントへのキラリティ伝達 Chirality transfer from chiral perovskite to molecular dopants via charge transfer states
Guan-Lin Chen,Hsinhan Tsai,Reshna Shrestha,Aaron Forde,Matthew R. Crawley,Cunyi Wei,Kai-Wei Tseng,Zhe-Yu Liu,Chi-An Dai,Xiao Tong,Mircea Cotlet,Leeyih Wang,Sergei Tretiak & Wanyi Nie
Nature Communications Published:10 March 2026
DOI:https://doi.org/10.1038/s41467-026-70362-x
Abstract
Chiral perovskites are semiconductors with broken mirror symmetries. Their photo responses are often constrained in the UV range. In this work, we demonstrate that doping 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane in the chiral perovskite matrix introduces a visible light absorption feature through the emerging charge-transfer electronic states. These charge-transfer states exhibits circular dichroism inherited from the chiral host, indicating effective chirality transfer from host to guest component via electronic coupling. Quantum-chemical modeling identifies a strong wave function overlap between an electron and a hole of the guest-host in a closely packed crystal configuration promoting the charge transfer state’s optical activity. We further integrate the doped chiral perovskite film into photodetectors and demonstrate a selective detection of circularly polarized light in both UV and visible regions. Our results suggest a universal approach of introducing visible photo absorption states to the chiral matrix to broaden the optical active range while enhancing the electrical conductivity.
