量子点敏化太阳能电池用Cu2ZnSnS4-Cu9S5异质结对电极

IF 1.4 4区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Solid-state Electronics Pub Date : 2025-07-14 DOI:10.1016/j.sse.2025.109190

Huanying Yang , Shixin Chen

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引用次数: 0

摘要

对电极（CEs）是量子点敏化太阳能电池（QDSSCs）中收集外电路电子和催化还原电解质的关键部件。因此，研究具有梯度势能的异质结ce对QDSSCs的电荷输运有积极的影响。本文设计了Cu2ZnSnS4-Cu9S5异质结作为CdS/CdSe量子点QDSSCs的CE，并制作了Cu9S5 CE进行比较。与Cu9S5 CE相比，基于Cu2ZnSnS4-Cu9S5 CE的QDSSCs具有显著的短路电流密度（13.71 mA/cm2）和功率转换效率（3.27%）。电化学阻抗谱和Tafel极化结果表明，含有Cu2ZnSnS4-Cu9S5 CE的器件具有较低的串联电阻（7.23 Ω/cm2）和较高的极限电流密度值。这是由于Cu2ZnSnS4-Cu9S5异质结具有较高的催化活性和优越的电荷输运特性。因此，这项工作表明异质结ce在光电器件领域具有很大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Cu2ZnSnS4-Cu9S5 heterojunction counter electrode for quantum dot-sensitized solar cells

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Cu2ZnSnS4-Cu9S5 heterojunction counter electrode for quantum dot-sensitized solar cells

Counter electrodes (CEs) are key components for collecting external circuit electrons and catalyzing reduced electrolytes in quantum dot-sensitized solar cells (QDSSCs). Hence, inquiry into heterojunction CEs with gradient potential energy can positively impact the charge transport of QDSSCs. In this work, a Cu₂ZnSnS₄-Cu₉S₅ heterojunction was designed as the CE for QDSSCs with CdS/CdSe quantum dots, and a Cu₉S₅ CE was fabricated for comparison. Compared to the Cu₉S₅ CE, QDSSCs based on the Cu₂ZnSnS₄-Cu₉S₅ CE exhibited a significantly improved short-circuit current density (13.71 mA/cm²) and power conversion efficiency (3.27 %). The electrochemical impedance spectroscopy and Tafel polarization results revealed that the device containing the Cu₂ZnSnS₄-Cu₉S₅ CE had a lower series resistance of 7.23 Ω/cm² and higher limiting current density values. This was attributed to the high catalytic activity and superior charge transport properties of the Cu₂ZnSnS₄-Cu₉S₅ heterojunction. Therefore, this work demonstrates that heterojunction CEs hold great potential in the field of optoelectronic devices.

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来源期刊

Solid-state Electronics 物理-工程：电子与电气

CiteScore

3.00

自引率

5.90%

发文量

212

审稿时长

3 months

期刊介绍： It is the aim of this journal to bring together in one publication outstanding papers reporting new and original work in the following areas: (1) applications of solid-state physics and technology to electronics and optoelectronics, including theory and device design; (2) optical, electrical, morphological characterization techniques and parameter extraction of devices; (3) fabrication of semiconductor devices, and also device-related materials growth, measurement and evaluation; (4) the physics and modeling of submicron and nanoscale microelectronic and optoelectronic devices, including processing, measurement, and performance evaluation; (5) applications of numerical methods to the modeling and simulation of solid-state devices and processes; and (6) nanoscale electronic and optoelectronic devices, photovoltaics, sensors, and MEMS based on semiconductor and alternative electronic materials; (7) synthesis and electrooptical properties of materials for novel devices.