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A stable photoanode tailored by mesosphere TiO2 decorated SnO2 nanobeads exceeding power conversion efficiency of 9.09 % through Fermi energy modulation impacting on electron transport

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-05-24 DOI:10.1016/j.materresbull.2025.113564

S. Athithya , K. Gunasekaran , S. Kamalakannan , S. Muthu Mariappan , S. Harish , M. Navaneethan , H. Ikeda , J. Archana

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引用次数: 0

Abstract

The conventional TiO₂ charge extraction layers are used as photoanodes of dye sensitized solar cells (DSSC) and often encounter large electron-hole pair recombination due to the low carrier mobility. Hence, it is highly required to enhance the transport properties of TiO₂ to improve the photo conversion efficiency (PCE) of DSSC. Focusing on this issue, we prepare TiO₂/SnO₂ nanocomposite (with different weight percentages of SnO₂) as a charge extraction layer and study the performance of the fabricated DSSC. The DSSC device fabricated with TiO₂/SnO₂ photoanode attains a maximum PCE of 9.09 % along with a current density (J_SC) of 19.02 mA/cm². Meanwhile, the TiO₂ mesosphere photoanode-based DSSC device exhibits a PCE of 4.31 % with a current density of 10.10 mA/cm². Furthermore, the first-principles calculation reveals the most stable configuration of the system and the interactions between TiO₂ and SnO₂. Also, Bader charge analyses are performed to quantify the charge transferred between TiO₂ and SnO₂. To the best of our knowledge, the PCE reported in this work is the highest for the TiO₂/SnO₂ photoanode-based DSSC of this kind.

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通过影响电子输运的费米能量调制，由介层TiO2修饰的SnO2纳米球定制的稳定光阳极的功率转换效率超过9.09%

传统的TiO2电荷提取层用作染料敏化太阳能电池（DSSC）的光阳极，由于载流子迁移率低，经常遇到较大的电子-空穴对复合。因此，为了提高DSSC的光转换效率（PCE），需要增强TiO2的输运性质。针对这一问题，我们制备了TiO2/SnO2纳米复合材料（SnO2的重量百分比不同）作为电荷提取层，并研究了所制备的DSSC的性能。采用TiO2/SnO2光阳极制备的DSSC器件的最大PCE为9.09%，电流密度（JSC）为19.02 mA/cm2。同时，TiO2介层光阳极DSSC器件的PCE为4.31%，电流密度为10.10 mA/cm2。此外，第一性原理计算揭示了体系最稳定的构型以及TiO2和SnO2之间的相互作用。此外，还进行了Bader电荷分析来量化TiO2和SnO2之间转移的电荷。据我们所知，本文报道的PCE是此类TiO2/SnO2光阳极DSSC中最高的。

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

Materials Research Bulletin

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.

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