Details

Autor(en) / Beteiligte

• Teng, Yuan
• Chen, Jing-Hua
• Huang, Yu-Hua
• Zhou, Zi-Chun
• Wang, Xu-Dong
• Kuang, Dai-Bin
• Chen, Hong-Yan

Titel

Atom-triggered epitaxial growth of Bi-based perovskite heterojunctions for promoting interfacial charge transfer

Ist Teil von

• Applied catalysis. B, Environmental, 2023-10, Vol.335, p.122889, Article 122889

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The construction of high-quality heterojunction with staggered band structure and close-contact interface, to satisfy both the thermodynamic and dynamic prerequisites of charge transfer, is the key to improve the charge separation of halide perovskites. The in situ growth of perovskite heterojunction via cosharing atoms provides an appealing solution to tackle this dilemma, but it remains a big challenge owing to the lack of appropriate precursors. Here, we design a novel visible-light responsive CoxBi2−xO2CO3 nanosheet, and use it as self-template to epitaxially grow Cs3Bi2Br9 nanosheet. It is revealed that close-contact 2D/2D heterointerfaces with strong chemical and electronic coupling are built via Bi atom bridge. Moreover, incorporating Co3+ into Bi2O2CO3 plays critical roles in heterojunction growth by regulating both the electronic structure and growth dynamics of Cs3Bi2Br9. Triggered by the effect of Co and the matched Bi lattice with Cs3Bi2Br9, the CoxBi2−xO2CO3/Cs3Bi2Br9 heterojunction can drive the fast Z-scheme transfer and separation of photoexcited charge carriers. [Display omitted] •A novel CoxBi2−xO2CO3 nanosheet is developed to epitaxially grow Cs3Bi2Br9.•Bi atom bridge helps to form the strong chemical and interfacial coupling effects.•The Co3+ can regulate the electronic properties and growth dynamics of material.•The CoxBi2−xO2CO3/Cs3Bi2Br9 hybrid follows direct Z-scheme charge transfer channel.•The hybrid catalyst drives fast transfer and spacial separation of charge carriers.