Simultaneous enhancement of visible light absorption and energy storage performances of W5+ implanted WO3-x thin film electrodes

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2024-11-13 DOI:10.1016/j.physb.2024.416737

Lukman O. Animasahun , Saheed A. Adewinbi , Bidini A. Taleatu , Abdulmajeed Abdullah Alayyaf , Haekyonug Kim , Adeniyi Y. Fasasi

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Abstract

Herein, we report the implantation of oxygen vacancy dopants in electro-coated WO₃ thin film electrodes for enhanced energy and environmental applications. The implantation method involved partial de-oxidation in sodium borohydride to introduce oxygen vacancies into the WO₃ electrodes. The doped WO_3-x demonstrated a significantly lowered average band energy of 2.11 eV, indicating its ability to absorb over 75 % of the visible light spectrum. Moreover, a thin film asymmetric supercapacitor assembled with WO_3-x negatrode demonstrated an improved areal capacitance of 1.15 mFcm⁻² and energy density of 0.33 μWhcm⁻² while consuming power at 17.50 μWcm⁻² when cycled at 25 μAcm⁻². Our solution-processed technique allows for controllable vacancy implantation and binder-free coating of WO_3-x on various substrates. It significantly reduces the processing time and requires low energy consumption, making it a practical and efficient method for enhancing the overall photo-conversion and energy storage performances of WO₃-based electrodes.

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同时增强 W5+ 植入 WO3-x 薄膜电极的可见光吸收和储能性能

在此，我们报告了在电镀 WO3 薄膜电极中植入氧空位掺杂剂以增强能源和环境应用的情况。植入方法包括在硼氢化钠中进行部分脱氧，从而在 WO3 电极中引入氧空位。掺杂的 WO3-x 显示出显著降低的 2.11 eV 平均带能，表明其能够吸收 75% 以上的可见光光谱。此外，用 WO3-x 负极组装的薄膜非对称超级电容器的面积电容提高到 1.15 mFcm-2，能量密度提高到 0.33 μWhcm-2，而在 25 μAcm-2 下循环时的功耗为 17.50 μWcm-2。我们的溶液加工技术可在各种基底上实现可控的空位植入和 WO3-x 无粘结剂涂层。它大大缩短了加工时间，能耗低，是提高基于 WO3 的电极的整体光电转换和储能性能的一种实用而高效的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces