Dion–Jacobson Phase Perovskite Ca2Nan–3NbnO3n+1– (n = 4–6) Nanosheets as High-κ Photovoltaic Electrode Materials in a Solar Water-Splitting Cell

Aziza, Miladina Rizka ORCID: https://orcid.org/0000-0001-8832-7398, Chang, Chia-Wei, Mohapatra, Anisha, Chu, Chih-Wei, Kaun, Chao-Cheng and Su, Yen-Hsun (2020) Dion–Jacobson Phase Perovskite Ca2Nan–3NbnO3n+1– (n = 4–6) Nanosheets as High-κ Photovoltaic Electrode Materials in a Solar Water-Splitting Cell. ACS Applied Nano Materials, 3 (7). pp. 6367-6375. ISSN 2574-0970

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Abstract

A well-crystalline two-dimensional (2D) perovskite material, Ca2Nan−3NbnO3n+1− (CNNO−) nanosheets, derived from the Dion−Jacobson phase has the potential to generate hydrogen
through photoelectrochemical water splitting. Here, we demonstrate that a high-κ photovoltaic electrode consisting of CNNO− nanosheets with layer number n = 4−6 and a hole-transport polymer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), can form a p−n junction and an overall solar-to-hydrogen water-splitting cell, with the highest efficiency of 0.52% and a hydrogen evolution rate of 80.64 μmol h−1. First-principles calculations are carried out to confirm the energy-band diagram of this promising material, which significantly affects the electronic transition process in a solar water-splitting cell. 2D CNNO− nanosheets present great potential for serving as nanoelectronic water-splitting devices in single transistors.

Item Type:	Journal Article
Keywords:	two-dimensional perovskite; solar water splitting; hydrogen generation; renewable energy; first-principles calculation; Dion−Jacobson phase
Depositing User:	Miladina Rizka Aziza
Date Deposited:	14 Jun 2023 20:16

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