Spontaneous dissociation of excitons in polymeric photocatalysts for overall water splitting.

ABSTRACT: Poly (Triazine Imide) (PTI), like other polymeric semiconductors, suffers from the high exciton binding energy, which intrinsically impedes the separation of photo-induced charge carriers. Herein, we present a crystal structure engineering strategy that exploits the lattice mismatch between the CaCl₂ ( 1¯ 12) growth template and basal planes of PTI to synthesize unusual PTI nanoplates featuring spontaneous exciton dissociation. The measured exciton binding energy of 15.4 meV in PTI is much lower than the room-temperature thermal fluctuation energy (25.7 meV), which is an indicator of realizing spontaneous exciton dissociation. The in-plane lattice contraction and the interlayer Ca²⁺ doping are revealed as the underlying reasons for the desirable delocalization and ani

SUBMITTER: Bai K 

PROVIDER: S-EPMC12480120 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature